www.nipponsteel.com

Steel
Sheet

N I PPON STEEL QUALITY PRODUCTSZAM™ is a highly corrosion-resistant
hot-dip coated steel sheet that has a coating layerof zinc, 6% aluminum, and 3% magnesium.

2-6-1 Marunouchi, Chiyoda-ku,Tokyo 100-8071 Japan

Tel: +81-3-6867-4111

ZAM™
U110en_06_202312p© 2020, 2023 NIPPON STEEL CORPORATION

1 What is

TM

?

TM

1

What is
ZAM™?

What isTM?

2

N I PPON STEEL QUALITY PRODUCTS

Manufacturing
process3

Qualitycharacteristics

ZAM™ is a brand of highly corrosion-resistant hot-dip coated steel sheet
of NIPPON STEEL.

4Chromium-freetreatment

NIPPON STEEL has succeeded in launching ZAM™ on the market for theTMfirst time in the world.
Due to the effects of magnesium and aluminum, ZAM™ brand producthas excellent corrosion resistance, scratch resistance as well as formability, and can be applied in a wide range of fields.

5Standards

ZAM™ is a highly corrosion-resistant

6

hot-dip coated steel sheet that has a coating layer

Examplesofprocessed
productsof zinc, 6% aluminum, and 3% magnesium.

7

Acquiredcertifications
Certificates

NIPPON STEEL has provided not only steel products but also various
solutions for our customers.

8

We aim to create new market opportunities along with supplying high-val-

Masstablesue-added products, which we have developed with our advancing tech-9

nologies based on our worldwide research and development.

Typicalapplications

10

Affiliate
companies'
products

11

Precautions

NoticeWhile every effort has been made to ensure the accuracy of the information contained whithin this publication,the use of theinformation is at the reader’s risk and no warranty is implied or expressed by NIPPON STEEL CORPORATION with respect to theuse of the information contained herein. The information in the publication is subject to change or modaification without notice.
Please contact the NIPPON STEEL CORPORATION office for the latest information.
Please refrain from unauthorized reproduction or copying of the contents of this publication.
The names of our products and services shown in this publication are trademarks or registered trademarks of NIPPON STEELCORPORATION, affiliated companies, or third parties granting rights to NIPPON STEEL CORPORATION or affiliated companies.
Other product or service names shown may be trademarks or registered trademaks of their respective owners.

12

1 What is

TM

?

TM

Superior corrosion resistance - 2

Substitute for post
hot-dip galvanizing

Long product life

Excellent corrosion resistance is achieved on cut edge of ZAM™ with a fine zinc-based protective film that contains
Al and Mg leaching from the coating layer.

Chemical treatment

Light coating
weight yet highcorrosion resistance

1

ZAM™ coating layer

Substrate

Reduction inboth coating andtransportation costs

What isZAM™?

ZAM™ coating layer
Cut edges covered
with thin zincbased protective
film containing Mg

Substrate

LCC (Life Cycle Cost)
Reduced repair cost

TM

Reducedmanufacturing costEco-friendlinessthrough process saving

Red rust
Immediately after exposure

Intermediate exposure period(several weeks to several years)

Initial exposure period

2

Manufacturing
process

3 years after exposure3

Qualitycharacteristics

Magnified view(Thickness:3.2mm)

4Superior press formability

ZAM™ is a brand of highly corrosion-resistant hot-dip coated steel sheet of NIPPON STEEL.

Chromium-freetreatment

With a harder and smoother coating layer than hot-dip zinc-coated steel sheets, ZAM™ shows excellent press
formability contributing to higher productivity.
Comparison in drawing properties

5Standards

Hot-dip zinc-coatedHot-dip zinc-coated

TM

TM

6
Cracking

Superior corrosion resistance - 1
In terms of corrosion resistance, ZAM™ is 10 to 20 times better than hot-dip zinc-coated steel sheets*1 and 5 to 8 times
better than hot-dip zinc-5%aluminum alloy coated steel sheets*2.

● This comparison test was conducted on the same steel grades under thesame forming conditions.

Hot-dip zinc-coatedExamplesofprocessed
products

Large

7

Small

Acquiredcertifications
Certificates

Forming can be achieved
without cracking.

*1, *2: Estimated by salt spray test

Comparison of corrosion
resistance of flat sections

Remaining flange

ZAM™ leaves a smaller area of flange after forming.

Superior drawing properties

TM

8

Mass
tablesCost reduction through eliminating post hot-dip galvanizing process.

9

Typicalapplications

Cost reduction by post hot-dip galvanizing / post painting process omission● After 2,500 hours of salt spray test, the surface appearances of the samples were compared (coating weight: 90/90 g/m 2).

Corrosion mechanisms of flat sections

Hot-dip
zinc-coatedWhite rust composed
primarily of zinc oxide

Occurrenceof red rust

Post hot-dip
galvanizing
Post-painting

Hot-/cold-rolled
steel sheet

Processing
Transport

Forming

Post hot-dip Surface finish
galvanizing
inspection(Surface appearance)

Final productinspection

10

Affiliate
companies'
products

To customers
Post-painting

Zinc coating layer

11
Coated steel sheet

Substrate

Processing
Transport

Zinc and Zinc-Aluminum based
protective surface
film containing Magnesium

TM

Forming

These processes are
eliminated with ZAM™

Cost reduction/shortened delivery time

Precautions

Final productinspection
To customers

ZAM™ coating layer
TM

Substrate

3

ZAM™ can contribute to reducing costs significantly - for instance, it enables initial cost reduction through process
omission and life cycle cost reduction thanks to its superior corrosion resistance.
ZAM™ is a brand of highly corrosion-resistant hot-dip coated steel sheet that NIPPON STEEL has succeeded
in launching on the market for the first time in the world.
Due to the effects of magnesium and aluminum, ZAM™ brand product has excellent corrosion resistance,
scratch resistance.

42 Production process

TM

Production bases

ZAM™ production line

ZAM™ isSetouchi Works Hanshinarea (Toyo)HCGL (hot dipping line)

produced with HCGL in Setouchi Works
Hanshin area (Toyo), 1CGL in Setouchi
Works Hanshin area (Sakai), 3CGL in
Nippon Steel Coated Sheet Corporation
Higashi-Nihon Works Ichikawa (Chiba),
and AGL in Wheelig-Nippon Steel,Inc.
(U.S.A)

Wheelig-Nippon Steel, Inc.
AGL

1

In this hot dipping line (HCGL), a verticaldirect-fired reducing furnace and a horizontal
radiant tube furnace are combined toachieve improvement in both annealing
furnace operation and product quality.
Incorporating four pots, this production line
is capable of making several types ofcoated steel sheets (ZAM ™ , Hot-dip
galvanized sheet ). In addition, it covers awide range of steel sheet thicknesses.

What isZAM™?

2Manufacturing
process3

Qualitycharacteristics

Cooling tower
Cooling section
Tension leveler

Nippon Steel Coated Sheet
Corporation
Higashi-Nihon Works Ichikawa
3CGL
Setouchi Works
Hanshin area (Sakai)
1CGL

Production range

0.8 - 6.0

Setouchi Works
Hanshin area (Sakai)

0.25 - 1.2

Nippon Steel Coated Sheet Corporation
Higashi-Nihon Works Ichikawa

0.25 - 2.3

Wheelig-Nippon Steel,Inc.

0.35 - 3.2

4

Horizontal radianttube furnace

Chromium-freetreatment

Preheating
furnace
Oiler
Post-treatment

Verticaldirect-fired
reducing
furnace15Standards

6
Shipment

Sheet thickness(mm)Setouchi Works
Hanshin area (Toyo)

2

Tension reel
Payoff reelExit-side looper

Examplesofprocessed
products

Pre-treatment

7

Setouchi Works
Hanshin area (Toyo)
HCGL

Acquiredcertifications
Certificates

2-stand skin-pass mill
4-pot galvanizing bath

3

Entry
Welder

Entry-side looper

8

Pickling and cold-rolling equipment

Masstables9

Typicalapplications

10

Affiliate
companies'
products

11

Precautions

5

Setouchi Works Hanshin area (Toyo)

Setouchi Works Hanshin area (Sakai)962-14 Hojo, Saijo-City,
Ehime, 799-1354 Japan

5 Ishizunishimachi, Nishi-ku, Sakai-City,
Osaka, 592-8332 Japan

Nippon Steel Coated Sheet Corporation
Higashi-Nihon Works Ichikawa
7-1 Koyashinmachi, Ichikawa-City,
Chiba, 272-0011 Japan

1

2

3

Annealing furnace(Vertical direct-fired reducing furnace)

Annealing furnace(Horizontal radiant tube furnace)

Galvanizing pot

6

3 Quality characteristics

TM

Corrosion resistance mechanism of ZAM™

Comparison of properties with various types of coated steel sheets
Zinc-Aluminum based fineprotective film containing Mg

Mechanism of corrosion
resistance on flat section

Corrosion of coating
layer suppressed

Coating layer

Coating layer
Substrate
5μm● Galvanized coating layer also forms aprotective film on the surface. This
protective film, however, is not as fine as
in ZAM™, and less adhesive (see photo atright).
In contrast, the protective film formed on
the coating surface of ZAM™ is excellent inboth fineness and adhesion, andconsequently it inhibits permeation ofc o r ro s i o n fa c to rs, p re s e r v i n g h i g hcorrosion resistance over a long period.

(Thickness: 0.8 mm, coating weight: 90/90 g/m , untreated)
2

ZAM™

Initial period of exposure

Hot-dip galvanizing

Initial exposure period(up to several weeks)

1What isZAM™?

2Manufacturing
process

Red rust occurrence after salt spray test (untreated)
14,0003

ZAM™
55% Al-Zn alloy coated steel
Zn-5% Al alloy coated steel
Galvanized steel

12,00010,000Qualitycharacteristics

55% Al-Zn alloy
coated steel

8,000

4

Chromium-freetreatment

6,000
4,000
2,000
0

5
100

200

300

400

500

Standards

600

One-side coating weight (g/m )2

Zn-5% Al alloy
coated steel

6

Examplesofprocessed
products

Red rust
occurred7

Note: The color and the speed of change in color depend on sheet thicknesses andexposure environments (region, installation location, aspect, etc.).

Intermediate exposure period(several weeks to several years)

Initial rust due
to oxidation

Substrate

Acquiredcertifications
CertificatesLong exposure period

Cut endis covered
with protective film
due to sacrificial
protection.

Substrate

Graduallyturns
darker↓↓Eventuallychangesto gray-black

The fine zinc-based protective film containing
Mg covers the cut edge with leachingof Zn, Al, and Mg from the coating layer.

CI

Mass
tablesRed rust
occurred

ZAM™ shows better red-rust resistance(durability) on cut edge than any othercoated steel sheet.

Lapse of time
Zn

8
10mm

9

Typicalapplications

Mg

10(Thickness: 3.2 mm, coating weight: 120/120 g/m2, untreated)(Thickness: 2.3 mm, coating weight: 130/130 g/m2, post-treatment: chromate 50 mg/m2)

Fe

Galvanized steel

Corrosion resistance on
cut edge

Appearances of cut edges after salt spray test

Cross-sectional structure and distribution of elements formed on cut edges after 18 months of outdoor exposure test

AI

2,500h(Thickness: 3.2 mm, coating weight: 150/150 g/m2, post-treatment: chromate 50 mg/m2)

The exposed cut edge ofsubstrate is oxidized
due to rain, condensation, etc.

SEI

1,200h5mm

Coating layer

Substrate

Outdoor exposure for 3 years

500h

ZAM™

▶

Excellent corrosion resistance isachieved on cut edge parts by covering
the ends with a fine zinc-based
protective film that contains Al and Mg
leaching from the coating layer.

Lapse of time

Protective film formed on the coating surface
after salt spray test (4 hours)

2μm

Mechanism of corrosion
resistance on cut edge

(Coating weight: 90/90 g/m2, untreated)

ZAM™ has better resistance to red rustthan galvanized and hot-dip zinc-5%
aluminum alloy coated steel sheets.

Excellent corrosion resistance

Lapse of time before occurrence of red rust (hours)

Al and Mg in the coating layer of ZAM™
combine to form a fine, tightly adheredzinc-based protective film on its coating
surface as time passes. This protective
film suppresses corrosion of the ZAM™
coating.

Results of salt spray test (SST: JIS Z 2371)
Appearances of specimens after salt spray test

Corrosion resistance onflat parts

O

S

100h

1,000hAffiliate
companies'
products

5,000hZAM™

11Precautions

55% Al-Zn alloy
coated steel
B

Red rust
occurred
Red rust
occurredA
Zn-5% Al alloy
coated steel

Galvanized steel
10μm

Red rust
occurred

5mm

7

8

3 Quality characteristics

TM

Comparison of properties with various types of coated steel sheets
Change in the appearanceof cut edge during outdoor
exposure test
The cut edge of ZAM™ will be covered
with a protective film and change to a
subdued color as time passes.

Appearances of cut edge sections after outdoor exposure test (testing location: seaside industrial area in Sakai)(Thickness: 2.3 mm, coating weight: 90/90 g/m2, chromate treatment: 50 mg/m2)

Lapse of time

After 2 weeks

After 3 months

After 6 months

Corrosion resistance ofdrawn sections
ZAM™ shows better corrosion resistanceon drawn parts compared to hot-dip
zinc-5% aluminum alloy coated steel
sheets.

ZAM™
55% Al-Zn alloy
coated steel

Appearances of drawn parts after salt spray test
(Drawing height: 25 mm, thickness: 0.8 mm, coating weight: 70/70 g/m2, untreated)

Lapse of time0h1,000h2,000h1What is
ZAM™?

2

ZAM™

Manufacturing
process

Zn-5% Al alloy
coated steel

3

Galvanizedsteel

Qualitycharacteristics

4

Chromium-freetreatment(1t, 180° bending, thickness: 3.2 mm, 120/120 g/m2, untreated)

Lapse of time

100h

1,000h5Standards

4,000hZAM™

655% Al-Zn alloy
coated steel

Examplesofprocessed
products

Red rust
occurred

Red rust
occurred

5mm

ZAM ™ shows almost no change inappearance at the bent section.

(1t, 180° bending, thickness: 3.2 mm, 120/120 g/m2, untreated)

30 days

90 days

ZAM™

120

Corrosion loss of coating
layers after outdoor
exposure test
ZAM™ shows approximately four times
higher corrosion resistance than hot-dip
zinc-coated (according to the results of 8
years of exposure test)

Appearances of 1t bent section after outdoor exposure test

55% Al-Zn alloy
coated steel

Acquiredcertifications
Certificates

Red rust
occurred

Galvanizedsteel

Lapse of time7

Outdoor exposure test results

Zn-5% Al alloy
coated steel

Change in appearance atbent section during
outdoor exposure test

Red rust
occurredOutdoor exposure test site

Rural environment

120

ZAM™
Zn-5% Al alloy coated steel
Galvanized steel

100

80

60

Coastal environment
ZAM™
Zn-5% Al alloy coated steel
Galvanized steel

100

Corrosion loss (g/m2)

ZAM shows better corrosion (red-rust)
resistance even in bent sections thanany other coated steel sheets.
™

Zn-5% Al alloy
coated steel

Appearances of 1t bent section after salt spray test

Corrosion loss (g/m2)

Corrosion resistance ofbent sections

Typicalapplications

10

60

40

20

20

Affiliate
companies'
products

Exposure site
Red rust
occurred

Zn-5% Al alloy
coated steel
Galvanizedsteel

Rural environment

Kiryu-City, Gunma

Coastal environment

Nakagusukuson,
Okinawa(approx. 30m from theseashore)Masstables

9

80

40

8

11

0

2

4

6

Exposure period (years)

80Precautions

2

4

6

8

Exposure period (years)

10mm

9

10

3 Quality characteristics

TM

Corrosion potential

Chemical resistanceAcid/alkali resistanceCorrosion weight losses of coated steel sheets in acidic and alkaline aqueous solutions(Thickness: 2.3 mm, coating weight: 80/80 g/m2, untreated)

In acidic and alkaline aqueous solutions,
Z A M ™ s h ow s t h e s a m e c o r ro s i o nbehavior as other zinc-based coatedsteel sheets.

・Solution: Starting with an aqueous solution
containing 1 g/L Na2SO4 as the base mix, its pH
was varied from 1 to 14 by adding H2SO4 on theacidic side and NaOH on the alkaline side.
・To determine corrosion loss test pieces (n = 3)
were immersed for 24 hours in a solution
adjusted to each pH at 30ºC, and the corrosion
loss was determined. The cut edges and bottom
surfaces of the test pieces were sealed.

Corrosion potential in different solutions (after immersion for an hour)

ZAM
ZAM™

5%NaClpH6.5, 35ºC

HDZ

80

50

HDZ

Fe

Manufacturing
process

ZAM™
HDZ

30

Fe

SUS304
200

10

0

−200

Noble
1

2

3

4

7

11

12

13

2

AI

0.1%NaCl+H2SO4
pH4, 35ºC

20

What is
ZAM™?

ZAM™

SUS304400

1

5%NaCl+HNO3+H2SO4
pH3.5, 35ºC

ZAM™
55% Al-Zn alloy coated steel
Zn-5% Al alloy coated steel
Galvanized steel

60

AI

Fe

SUS30470
Corrosion loss (g/m2/day)

Test method

90

ZAM ™ and post hot-dip galvanizedproduct (HDZ) show nearly the samelevel of corrosion potential.

−400

3

AI

Qualitycharacteristics

−600

−800

−1000

−1200

4

Base

Potential (mV vs. SCE)

Chromium-freetreatment

14

pH

Corrosion potential test solutions

Z A M ™ s h ow s b e tte r re s i s ta n c e toammonia than hot-dip zinc-coated andhot-dip 55% aluminum-zinc alloy coatedsteel sheet

Test method
After immersion for 24 hours in 5% ammonia waterat 22ºC, the corrosion loss of each test pieces were
measured. The cut edges and bottom surfaces of
the test pieces were sealed.

pH

Temperature(ºC)

Remarks

5％ NaCl

6.5

35

Solution specified in JIS Z2371 (salt spray test)

Corrosion weight loss of coated steel sheets in ammonia water30
25
Corrosion loss (g/m2/day)Ammonia resistance

Solution

5％ NaCl＋HNO3 ＋H2SO4*1

3.5

35

Solution specified in JIS H8502(cyclic artificial acid rain test)

0.1％ NaCl ＋ H2SO4*2

4

35

Solution specified in acid rain simulated
combined-cycle corrosion test (see page 14)

20

Measurement was taken after the specimen was immersed in water solution for an hour and its corrosion
potential was found fairly stable.

15*1: 5% NaCl (10 L) + HNO3 (12 mL) + H2SO4 (17.3 mL), pH adjusted by NaOH
*2: H2SO4 is added to 0.1% NaCl solution to adjust pH to 4.

10

5Standards

6

Examplesofprocessed
products

7

Acquiredcertifications
Certificates8

Masstables5<Reference> Results of exposure test in a closed compost house (5 years)
0

ZAM™

Zn

55% Al-Zn

ZAM™

Hot-dip 55%Al-Zn
alloy coatedFlat part2t bent
sections

Cut
edge

9

Typicalapplications

10

Affiliate
companies'
products

ZAM™
K27
ZG treatment

11

Precautions

Exposure test in a compost house (Shibetsu-City, Hokkaido)
ZAM ™ showed better corrosion resistance than hot-dip 55%Al-Zn alloy
coated sheet.
(No red rust occurred in any of the flat sections bent sections, and cut edges.)

Hot-dip 55%Al-Zn
alloy coated
AZ150
Organic chromate
treatment
Red rust
occurred

50mm

11

1mm

1mm

12

3 Quality characteristics

TM

Results of corrosion resistance comparison with post hot-dip zinc-coated steel sheets
Corrosion resistancecomparison with post hotdip zinc-coated steel
sheets(HDZ55: JIS H8641)

Appearances of flat parts after salt spray test

With only 1/6 of the coating weight ofpost hot-dip zinc-coated steel sheets,
ZAM ™ exhibits corrosion resistanceequal to or better than theirs. The
following examination certifications admitthat ZAM ™ may replace post hot-dip
galvanized steel. (see page 38).

Thickness: 2.3 mm
90/90 g/m2

・Construction technology examination
certification (building technology)
Building Center of Japan
・Construction technology examination
certification
Public Works Research Center

500h

1,000h2,000h4,000h700

ZAM™ shows better corrosion resistancecompare to post hot-dip zinc-coatedsteel sheets (HDZ55) in a sulfur dioxide(sulfurous acid gas) environment.

ZAM™

ZAM™
Post hot-dip galvanizedproduct (HDZ55)

600

Red rust
occurred.

1

What is
ZAM™?

500

Corrosion loss (g/m2)

Lapse of time

Corrosion loss of ZAM™ and post hot-dip galvanized product in sulfur dioxide test

Corrosion resistancecomparison in a sulfur
dioxide environmentAppearances after 450 hours of sulfur dioxide test

2

400

Manufacturing
process

300
200

ZAM™
Post hot-dip
galvanized product(HDZ55)

3

Qualitycharacteristics

100

Thickness: 2.3 mm
90/90 g/m2

0

100

200

300

400

500

Test duration (hr)Thickness: 2.3 mm
560/560 g/m2

Chromium-freetreatment

Test conditions

Post hot-dip
galvanized product(HDZ55)20mm

4Sulfur dioxide concentration: 100 ppm
Testing temperature: 40ºC
Relative humidity: 98% or more

5Standards

Thickness: 2.3 mm
560/560 g/m2

6

Examplesofprocessed
products

10mm

Lapse of time

500h

1,000h2,000h4,000hZAM™

Corrosion resistancecomparison in acid rain
simulated combined-cycle
corrosion test
ZAM™ shows better corrosion resistancecompare to post hot-dip zinc-coatedsteel sheets (HDZ55) in an acid rain
environment.

Thickness: 2.3 mm
90/90 g/m2

Test conditions

ZAM™
Post hot-dip galvanizedproduct (HDZ55)

160
140

Acquiredcertifications
Certificates

Masstables120
100

9Typicalapplications

80
60

0

Moistening 3 hrs, 50ºC, relative humidity: 98%

7

8

10

Affiliate
companies'
products

20

Drying 4 hrs, 50ºC, relative humidity: 30%

Thickness: 2.3 mm
560/560 g/m2

180

40

Acid rain simulated solution spraying 1 hr, 35ºC, pH:4
（0.1％NaCl＋H2SO4）

Post hot-dip
galvanized product(HDZ55)

Corrosion loss of ZAM™ and post hot-dip galvanized product in acid rain simulated
combined-cycle corrosion test

Corrosion loss (g/m2)

Appearances of cut edges after salt spray test

0

200

400
Cycles600

11Precautions

Corrosion rates of ZAM™ and post hot-dip galvanized product酸性雨模擬液噴霧
1時間
35℃ pH4 corrosion testin acidrain simulated
combined-cycle*Post hot-dip products are first cut to shape and then coated.

（0.1％NaCl＋H2SO4）

5mm

乾

燥

4時間

50℃

湿

™
潤
3時間
50℃
90/90 g/m2, untreatedZAM

相対湿度30％Corrosion rate
相対湿度98％

Post hot-dip galvanized product560/560 g/m2, untreated

0.05 g/m2/cycle
0.32 g/m2/cycle

Note: Mean value during 500 cycles

13

14

3 Quality characteristics

TM

Comparison in characteristics with post galvanized (Electrogalvanized) and post-painted (cationic electrodeposition coating) products
Results of combined-cycle
corrosion tests of flatparts and cut edges
ZAM™ shows better corrosion resistancethan post hot-dip galvanized and postpainted products.

Appearances of flat parts and cut edges after combined-cycle corrosion test

Results of corrosion testsof painted materials

Thickness: 2.3 mm

Before test
Flat
sectionCutedge

60 cycles
Flat
section120 cycles

Cut
edge

Flat
sectionPost-paintability

Cut
edge

Appearances of coated materials after corrosion test (cross cut sections)

SST
500h

ZAM™ is superior to other coated steel
sheets in terms of corrosion resistanceafter painting.

CCT
62 cycles

1

What is
ZAM™?

ZAM™

ZAM™

2

90/90 g/m2

90/90 g/m2
ZC treatment

Manufacturing
process3

Qualitycharacteristics

Post galvanized(Electrogalvanized)
100/100 g/m2
Chromate
100 mg/m2

Zn-5% Al alloy
coated steel

4

Chromium-freetreatment

90/90 g/m2

Test conditions
JASO M609-91
Salt spray 2 hrs, 35ºC, 5%NaCl
Drying 4 hrs, 60ºC, relative humidity: 30%
Moistening 2 hrs, 50ºC, relative humidity: 95%

5

Post-painted(Cationic electrodeposition coating)
Film thickness:
15μm

Standards

Test conditions
Red rust*Post galvanized and post-painting were also provided on the cut edges. occurred
塩水噴霧

2時間

35℃

5％NaCl

乾

4時間

60℃

相対湿度30％

湿

燥
潤

2時間

50℃

Drawn sections of ZAM™ exhibit better
corrosion resistance than those of post
galvanized steel (galvanized after
processing).

①SST: JIS Z2371 (neutral salt spray test)
35ºC, continuous spraying with 5% NaCl
②CCT: JASO M609-91(combined-cycle corrosion test)
SST (2 hrs) → Drying (4 hrs) → BBT (2 hrs)

Examplesofprocessed
products

90/90 g/m2

7
20mm

Material tested: Untreated material of each coatedsteel sheet
Pre-treatment: Zinc phosphate treatment(PALBOND 138)
Paint: Acrylic resin Super Lac F-50
Film thickness: 30 µm

相対湿度95％Results of combined-cycle
corrosion tests of drawn
sectionAppearances of drawn section after combined-cycle corrosion test
Drawing height: 25 mm, thickness: 0.8 mm

Before test

60 cycles

120 cycles

ZAM™

・Precautions(1) As with Hot-dip Zn-5%Al alloy coated, it is recommended to control theconcentrations of treatment solutions because aluminum contained in thecoating layer dissolves into pre-treatment (zinc phosphate treatment) solutions
and lessens their effects.
(2) The above painting data is an example. It is recommended that each customer
test and check the paintability beforehand.
(3) When chemically-treated substrate is used, application of adequate primer isrecommended.

Acquiredcertifications
Certificates8

Masstables9

Typicalapplications

90/90 g/m2
ZC treatment

10

Post galvanized(Electrogalvanized)
100/100 g/m2
Chromate
100 mg/m2

11*Post galvanizing was conducted after processing. The cut edges were sealed.

15

20mm

6

Galvanized steel

Affiliate
companies'
products

Precautions

20mm

16

3 Quality characteristics

TM

Weldability

Arc welding
1. Welding machine
ZAM™ can be welded with a off-the-shelf
welding machine. Welding environment
can be improved with the use of invertercontrolled welding machines developedby equipment manufacturers to reduce
spatters.
2. Welding wire
Welding wires for carbon steel andstructural steel can be used. However, toreduce spatters, blow holes, pits, andother defects, it is advisable to use
welding wires developed specially forgalvanized steel. Recommended wires
are shown on the right.

Recommended welding wires for class 400N substrates

Recommended welding wire brand (shielding gas: Carbon dioxide)
General-purpose wire
Wire for coatedsteel sheets

Nippon Steel Welding & Engineering Co., Ltd.: YM28Z (G49A0C0),

Flux-cored wire

Nippon Steel Welding & Engineering Co., Ltd.: SM-1 (T49J0T15-0CA-G-UH5),
SM-1F (T49J0TI-0CA-UH5),

12

13

ZAM™ (60/60)

1What is
ZAM™?

Galvanized steel sheet (40/40)
Zn-5% Al alloy
coated steel sheet (75/75)

255%Al-Zn alloy
coated steel sheet (50/50)

Manufacturing
process

Galvanealed steel sheet (40/40)
Aluminized steel sheet (30/30)

3Qualitycharacteristics

Cold-rolled steel sheet

Share fracture
Test conditions
Electrode pressure : 200 kgf
Electrode tip shape: CF type, 6 mm in diameter

Electrode

OptimumWeld time : 12 cycles

Expulsion

Sticking

Thickness: 0.8 mm

Projection by press work

4

5

Expansion of theelectrification area
Increase of adequate
weld current

Electrode

To obtain defect-free joints with sufficient
weld strength and a desirable internal
sectional structure, it is essential toconduct welding under appropriate
conditions.

Spacer2

17

Welding current (kA)
8
9
10
11

7

Condition of an arc weld zone

Standards

6

Examplesofprocessed
products

7

NuggetGapless

Examples of gap installation

1

Condition of a spot weld zone

Acquiredcertifications
Certificates8

MasstablesSectional structure
3.2 mm, coating weight: 145/145 g/m2

Sectional structure
1.6 mm, coating weight: 70/70 g/m2

Photos of bead appearances<Examples of conventional
welding conditions><Examples of recommended
welding conditions>9

Typicalapplications

10

Affiliate
companies'
products

Decrease of welding defects with gaps
(ZAM™ Thickness: 2.3 mm, symbol; 90, lap-fillet welded joint)

11

80
70
Blowhole share ratio (%)

6. Installation of gaps
Lap fillet welding tends to cause such
defects as blowholes or pits frequently.
The most effective countermeasure is to
set up gaps between steel sheets. A gap
of 0.6 mm or wider helps substantiallyreduce these defects.

6

Coating layer melting

Quality of welds

4. Welding current and voltage
When welding ZAM™ at the same speed
as in the case of hot- or cold-rolled steel
sheets, the initial welding temperature
should be set slightly higher as more heatis absorbed by the evaporation of coating
material (current to be raised by 5%10%).

5

Spot welding of coated steel sheet (schematic)

Examples of gaps for blowhole countermeasures (lap-fillet welded joint)
Blowhole

Type of steel sheet

Chromium-freetreatment● Please consult us when welding wires for steel sheets other than class 400N are used.

3. Shielding gas
The third-class carbon dioxide stipulated
in JIS K 1106 is used. (The combinationof pulse current and Ar+20% CO2 gas willtend to decrease spatters to a greater
extent.)5. Welding speed
When such defects as blowholes or pits
are found, the welding speed should be
set lower than in the case of hot- or coldrolled steel sheets. Good beads can bemade if weld speed is slow enough torelease zinc vapor from the surface of themolten metal pool.

Nippon Steel Welding & Engineering Co., Ltd.: YM28,
Daido Steel: DS1A, etc. (equivalent to YGW12)When a coated steel sheet is spotwelded, the energizing path expands
due to melting of the coating layer,
resulting in a decrease in electric current
density. It is therefore necessary to use agreater welding current than in the caseof cold-rolled steel sheets.
The zinc contained in the coating layer
reacts with the copper alloy used for theelectrodes, which causes the electrodes
to wear rapidly, shortening their life. Fort h i s re a s o n , gra s p t h e l i fe o f t h eelectrodes in advance and periodically
dress or replace them.

Examples of spot welding conditions for various types of coated steel sheets

Cold-rolled steel sheet*In arc welding, high tensile stress may be caused around the weld beads depending on shapes and compositions of materials and procedures. When zinc coated steel sheets including
ZAM™ are welded, coating layer melted by the heat of welding may penetrate the grain boundary and cause cracks in the zones affected by such high tensile stress.

Spot welding

Coated steel sheet

As with other zinc-based coated steel sheets, weldability of ZAM™ is affected by its coating layer which is a metal with a low melting
point. In arc welding, ZAM™ is more susceptible to spatters, blow holes, crack-induced decline in joint strength and other defects thanhot-rolled and cold-rolled steel sheets. However, ZAM™ can be welded into joints with adequate strength under proper conditions.
Even in spot welding, adequate strength can be obtained under proper conditions. Since factors including types of welding machines
and shapes of joints influence the quality of welds, tests should be carried out beforehand to establish optimal welding parameters andprocedures. If you have any questions, please feel free to contact us.

60

Precautions：break in material：Break in welding bead

50
40
30
20
10
0
0.1
0.3
0.5
Gap between steel sheets (mm)0.7

Conventional welding conditions

Recommended welding conditions

Inverter type CO2 arc welding machine
Wire: YGW12Shielding gas: Carbon dioxide gas

Pulse MAG welding machine
Wire: YGW12Shielding gas: Ar + 20%CO2

Sputter and other problems can be prevented by conducing under appropriate conditions.

18

3 Quality characteristics

TM

Corrosion resistance of weld zones
Corrosion resistance of
weld zones (as welded)
Generally, the heat affected area oncoated steel by arc welding or spot
welding reduces corrosion resistancebecause the coating layer is melted orvaporized. The welded portion on ZAM™,
however, is less likely to suffer from redrust than other types of coated steels.

Touch-up painting (solvent)A Zn-Al based paint is recommended for touch-up of weld zones and cut eages.

Appearances of arc weld zones after salt spray test

Lapse of time

2,000h4,000hExamples of touch-up paints

Paint nameRoval Silver
Zinky special
O-well Mekki Silver (ZAM™ color)

ZAM™

Thickness: 2.3 mm
90/90 g/m2

Manufacturer

Type of paintColor

Roval Corporation
Nippon Paint Anti-corrosive Coatings Co., Ltd.
Nihon Ruspert Co., Ltd.

Zn-Al based
Zn-Al based
Zn-Al based

SilverSilverSilver1

What isZAM™?

2・Notes
1. Details of touch-up paints including their proper use, quality characteristics, and compatibility with environmental regulations
should be checked with respective makers.
2. In some cases, painting is not possible over touch-up paints. Be sure to check beforehand.

Manufacturing
process3

Qualitycharacteristics

Zn-5% Al alloy
coated steel

Corrosion resistance of
weld zones after touch-up

Thickness: 2.3 mm
90/90 g/m2

20mm

Weld beads

Satisfactory corrosion resistance can beobtained by touching up the weld zones
in an appropriate manner.

Appearances of touch-up painted areas after combined-cycle corrosion test

4

Thickness: 2.3 mm, coating weight: 85/85 g/m2

Paint

Chromium-freetreatment

Cycles
0

100

150

200

5

Standards

Zn based

6

Examplesofprocessed
products

Appearances of spot weld zones after salt spray test

Lapse of time

Before test

2,000h4,000h7

Acquiredcertifications
Certificates

ZAM™

Zn-Al based

Thickness: 2.3 mm
90/90 g/m2

8

Test conditions

Mass
tablesJASO M609-91

9

Salt spraying 2 hrs, 35ºC, 5%NaCl
Drying 4 hrs, 60ºC, relative humidity: 30%

Sample of welding method

Painting method

Moistening 2 hrs, 50ºC, relative humidity: 95%

・Welding method: CO2 arc welding
・Joint shape: Butt welding

・Pre-treatment: Wire brush・Degreasing: Organic solvent
・Painting: Brushed on・Drying: 60ºC, 10 min
・Film thickness: Approx. 40μm

Zn-5% Al alloy
coated steel

20mm

Typicalapplications

10

Affiliate
companies'
products

11

Thickness: 2.3 mm
90/90 g/m2

Corrosion resistance of
cut edges after touch-up
10mm

Additional corrosion resistance can beobtained by touching up the cut edges.

Appearances of touched-up cut edges after combined-cycle corrosion test

Precautions

Thickness: 2.3 mm, coating weight: 85/85 g/m2

Paint

Cycles100

200

Zn-Al based

19

20

3 Quality characteristics

TM

Other touch-up items
Va r i o u s m e t h o d s o f to u c h - u p a reavailable in addition to those withgeneral solvent-based touch-up paints.
(Before using any of the methods
described in this section, necessaryprior confirmation should be made by
the user.)

Scratch resistance of the coating layer① Touch-up painting can be easily conducted without drying.
Item
Name

Crayon containing Zn powder
Zinc Rich Pen

Advantages

・Can be applied only to necessary areas.
・No drying is required.

Distributor

Sanyu Chemical Industry Co., Ltd.

Appearance after one year of exposure test
ZAM™ 150/150 g/m2, 6.0mm thick, Ichikawa-city, Chiba

Touch-up with Zinc Rich Pen

No touch-up

Zinc Rich Pen

ZAM™ has a harder coating layer than hotdip galvanized or aluminum-zinc alloy
coated steel sheets. Thus, ZAM offers
better scratch resistance and can be used
in applications where it is subjected toscratching and repeated friction during
processing.

Scratch resistance of various types of coated steel sheets (scratch test)
18

Scratch load (gf)Touch-up painting<Reference> Hardness of the coating layer(Vickers hardness (HV) measurement examples)

ZAM™

140 〜 160

55%
Al-Zn alloy coated100 〜 110

Zn-5%
Al alloy coated

80 〜 100

Galvanized steel

55 〜 65

Scratch load measurement conditions

16

Testing needle material

Sapphire

14

Testing needle tip radius

0.05 mm12

Load0.0196 - 0.196 N(2 - 20 gf)

Travel distance

20 mm

10

・The surface was visually examined for any
scratching.
・The minimum load that produced scratching
was taken as the scratching load.

8
6
4
2

ZAM

™

55%
Zn-5%
Al-Zn alloy coated Al alloy coated

Usage

Immersion(Brushing is also possible.)

Sliding characteristics/Workability

Untreated

P (Pressing force)With ET CoatZAM™ - approximate color paintName#6900 Silver
Spray#6900 Silver← Before touch-up →P
0.12

Sample size

ZAM™

Galvanizedsteel

Galvanealed
steel

Workability
ZAM™ has better drawing characteristics
than other types of coated steel sheets.

Press oil

Z5 (Idemitsu Kosan)
0.72、1.45、2.90N/mm2

Pressing force

1、2、4kN

Pressing area

46 × 30mm2

Withdrawal rate

1000mm/min

Mold surface
roughness#1000 (Polishing foreach session)

Mold material

SKD11

Distributor

↑

Dd

BHF

Die

2.3

9

D＋∆D

D

Blank

Coating mass

ZAM™

70/70 g/㎡

Galvanized steel

60/60 g/㎡

Galvanealed steel

45/45 g/㎡

Material

Deep drawing
quality
Deep drawing
quality
Deep drawing
quality

Crack

Affiliate
companies'
products

Rp

2.2

C
Dp

2.1

Blank

11

Punch
Finished product
Limiting drawing ratio (LDR) = D/Dp

2

Samples

10

Rd

Vp

Inferior

Daiho Paint Co., Ltd.

← After touch-up →MasstablesTypicalapplications

Blank foldGeneral touch-up paint

21

8

Dp

・The color close to ZAM™ makes theAdvantages
touched-up area unnoticeable.

← Before touch-up →Acquiredcertifications
Certificates

2.4← After touch-up →Examplesofprocessed
products

7

0.8 mm (thickness) x 30 mm(width) x 300 mm (length)

Pressing pressure

0.08

0.04

Dynamic friction coefficient μ = F/2P

Sliding test conditions

Limiting drawing ratios (LDRs) of various typesof coated steel sheets

LDR

Usage

Comparison in appearance after touch-up

6(Withdrawal force)
0.16

↓

Item

F

Superior

Superior↑③ Can be touched up in a color approximate to that of ZAM™

Standards

0.20

Having a coating layer with high surface
hardness and smoothness, ZAM ™
exhibits superior sliding characteristics.

Sanyu Chemical Industry Co., Ltd.

5

Dynamic friction coefficients of various typesof coated steel

Sliding characteristics

・Materials with many end faces can be
Advantages
touched up at one time by immersing themin this solution.
Distributor

Chromium-freetreatment

Inferior

ET CoatDynamic friction coefficient

Name

Manufacturing
process

Qualitycharacteristics

GalvanizedsteelAppearance after one month of exposure test
ZAM™ 70/70 g/m2, 6.0 mm thick, Sakai-city, Osaka

2

4

↓

Item

What is
ZAM™?

3

0

② Even materials with many end faces can be easily touched up at one time.
Phosphate solution forcut edge treatment

1

ZAM™

Galvanizedsteel

Post-treatment

ZC treatment
ZC treatment

Galvanealed
steel

Precautions

Conditions for deep drawing test
Diameter of punch (Dp)

40mm

Diameter of die (Dd)

42mm

Shoulder radius of punch (Rp)

5mm

Shoulder radius of die (Rd)5mm

Stroke speed (Vp)

60mm/minPress forming oil

Z5 (Idemitsu Kosan)

ZC treatment

22

4 Chromium-free treatment

TM

ZC treatment Chromium-free inorganic treatment

Five different types of chromium-free treatments
With the superior corrosion resistance of ZAM™ maintained,
five different types of chromium-free treatments are available to suit various applications.
All of these treatments conform to the environmental regulations, including RoHS and ELV.

Electricalconductivity① Excellent electrical conductivity
The inorganic film has low electrical resistance and excellent
surface conductivity (spot weldability).

1② Corrosion resistance
The resultant film has corrosion resistance equivalent to thatobtained in the case of chromate treatment (A treatment).

Electrical conductivity

Processability

High processability

Post-paintability

Antidazzle property

Inorganic

Organic

Organic lubrication

Phosphate

Phosphate + organic

Chromium-freeinorganic treatment

Chromium-freeorganic special treatment

Chromium-freeorganic lubrication treatment

Chromium-freephosphate treatment

Chromium-free
low gloss treatment

ZC

ZG

ZJ

ZP

ZPG

Electrical conductivity
equivalent to that for
chromate treatment+
Weldability

Damage reduced
during processing

Page 24

High-processability
type that allows
continuous press

Page 25

Page 26

Superior
antidazzle property

Page 27

Page 28

Anticorrosion mechanism of films
Mechanism of corrosion control by chromate film

Mechanism of corrosion control by chromium-free film

(1) Corrosion control with environmental deprivation
・The chromate film covers the coating layer uniformly toprevent direct contact with corrosion factors.
(2) Corrosion control with self-repairing function
・If the chromate film is damaged due to processing for
instance, hexavalent chromium dissolves in a moist
environment to form an oxide film for self-repairing.

(1) Corrosion control with environmental deprivation
・The chromium-free film covers the coating layer uniformly
to prevent direct contact with corrosion factors.
(2) Corrosion control by self-repairing function
・If the chromium-free film is damaged due to processing
for insta nc e, soluble s a lt dis sol ve s und e r a moist
environment to form insoluble salt at the damaged are forself-repairing.

Corrosion factors
Cl - (NaCl) H2O
O2Corrosion factors
Cl - (NaCl) H2O
O2
Cr 6+

Chromate film

❶ Corrosion factor

shut-off

ZAM™ coating layer ❷ Self-repairing

Steel sheet

Chromium-free film ❶ Corrosion factor
shut-off
ZAM™ coating layer ❷ Self-repairing

Steel sheet

ZAM™ coating layer③ Superior compatibility with the environment
The resultant material is friendly to the environment because
its film is entirely free of chromium.

2

Steel sheet

Manufacturing
process3

Qualitycharacteristics

4

Chromium-freetreatment

5

Quality characteristics

Standards

Elution ofchromium

Corrosion resistance(SST72h)Contact
resistance value(grounded)

Fingerprint
resistanceAlkali
resistance

ZC treatment

No elution

White rust occurrence
10% or less10-5 〜 10-4 Ω

Δ L ≦ 1.0

Chromate treatment(A treatment)

ElutionWhite rust occurrence
10% or less10-5 〜 10-4 Ω

Δ L ≦ 1.0

Treatment

Superior
post-paintability

What is
ZAM™?

Chromium-free inorganic film

Solvent resistance
Ethanol

Acetone

○

○

○

○

○

○

Elution of chromium: Amount of chromium elution measured after the specimen has been immersed for 3 minutes in boiling water
Corrosion resistance: Salt spray test (JIS Z2371)
Contact resistance value: Measured by the four-terminal, four-probe method (Dia Instruments MCP-TPO3P)
Fingerprint resistance: Difference in brightness (ΔL) before and after impression with artificial finger-smudge solution (JIS K2246)
Alkali resistance: Appearance after immersion for 2 minutes in alkali degreasing agent (Nippon Paint SD-270) adjusted to pH of 12 and a temperature of 40ºC
Solvent resistance: Appearance after rubbing 5 times with gauze impregnated with the solvent(Evaluation standard/ ○ : no change, △ : some discoloration, × : film peeling)

Corrosion resistance of flat part

ZC treatment

A treatment

Corrosion resistance of bent part

(Reference)
Untreated

ZC treatment

A treatment

Product shape(Reference)
Untreated

90°

6

Examplesofprocessed
products

7

Acquiredcertifications
Certificates8

Masstables9

Typicalapplications

10

Affiliate
companies'
products

Appearances of bent parts
after 24 hours of humidity cabinet test (BBT)(90° bend, bending radius: 1 mmR)・No significant change in appearance wasfound in the ZC-treated material even with
BBT lasting 24 hours.

Dissolving ofsolublesalt
Appearances after 72 hours of salt spray test (SST)・No significant change in appearance was found in the
ZC-treated material even with SST lasting 72 hours.

10mm

11

Precautions

20mm

Test pieces
・ZC treatment: Coating weight symbol 90, thickness: 0.8 mm
・A treatment: Coating weight symbol 90, thickness: 0.8 mm
・Untreated: Coating weight symbol 90, thickness: 0.8 mm

2324

4 Chromium-free treatment

TM

ZG treatment Chromium-free organic special treatment

ZJ treatment Chromium-free organic lubrication treatment① Reducing damage during processing
It is expected that this processing reduces damage to thecoating layer during roll forming or press working.

Processability② Superior corrosion resistance
The special film provides better corrosion resistance both onflat and bent parts.

1② Superior corrosion resistance
Flat and bent sections show superior corrosion resistance.

Chromium-free organic special treatment film

ZAM™ coating layer③ Excellent fingerprint resistanceFingerprints left during handling are hardly noticeable.

Highformability① Good formability
The coefficient of friction is reduced by the addition of special
wax so that the product exhibits excellent formability andallows elimination of additional forming lubricants.

④ Superior compatibility with the environment
The resultant material is friendly to the environment because
its film is entirely free of chromium.

2

ZAM™ coating layer③ Excellent fingerprint resistanceFingerprints left during handling are hardly noticeable.

Steel sheet

What is
ZAM™?

Chromium-free organic lubrication treatment film

Manufacturing
process(Wax)
Steel sheet④ Superior compatibility with the environment
The resultant material is friendly to the environment because
its film is entirely free of chromium.

3

Qualitycharacteristics

4

Chromium-freetreatment

5

Quality characteristics
Quality characteristics

ScratchresistanceContact
resistance(grounded)

Fingerprint
resistanceAlkali
resistance

Solvent
resistance

SST240h, white rust occurrence
10% or less○∞Δ L ≦ 0.5○○

SST72h, white rust occurrence
10% or less△10-5 〜 10-4 Ω

Δ L ≦ 1.0○○

Elution ofchromium

Corrosion resistance

ZG treatment

No elution

ZC treatment

No elution

Treatment

Elution of chromium: Amount of chromium elution measured after the specimen has been immersed for 3 minutes in boiling water
Corrosion resistance: Salt spray test (JIS Z2371)
Scratch resistance: Appearance of the coating layer during processing
Contact resistance value: Measured by the four-terminal, four-probe method (Dia Instruments MCP-TPO3P)
Fingerprint resistance: Difference in brightness (ΔL) before and after impression with artificial finger-smudge solution (JIS K2246)
Alkali resistance: Appearance after immersion for 2 minutes in alkali degreasing agent (Nippon Paint SD-270) adjusted to pH of 12 and a temperature of 40ºC
Solvent resistance: Appearance after immersion for 2 minutes in acetone(Evaluation standard for alkali resistance and solvent resistance/ ○ : No change, △ : Some discoloration, × : Film peeling)

Scratch resistance ofbent section

Corrosion resistance of flat section

After 72 hrs of SST After 240 hrs of SST
ZG
ZC
ZG
ZC
treatment treatment treatment treatment

ZG
ZC
treatment treatment

Corrosion resistance ofbent section

ZG
ZC
treatment treatment

Corrosion resistanceContact
resistance(grounded)

Fingerprint
resistance

Treatment

Type

ZJ treatment

Organic

No elution

SST240h, white rust occurrence
10% or less

0.1∞

Δ L ≦ 0.5○○

Examplesofprocessed
products

ZG treatment

Organic

No elution

SST240h, white rust occurrence
10% or less

0.2∞

Δ L ≦ 0.5○○

7

No elution

SST72h, white rust occurrence
10% or less0.3 〜 0.4

10 〜10 Ω

Δ L ≦ 1.0○○

ZC treatment

Inorganic

Product shape

Bent section

Corrosion resistance of flat section

Scratch resistance ofbent section

After 72 hrs of SST After 240 hrs of SST

ZJ
ZC
treatment treatment

ZJ
ZC
ZJ
ZC
treatment treatment treatment treatment

35mm

Appearances after salt spray test

20mm

Test pieces
・ZG treatment: Coating weight symbol 90, thickness: 0.8 mm
・ZC treatment: Coating weight symbol 90, thickness: 0.8 mm

25After 72 hours of salt
spray test (SST)

10mm

・Drawn into a hat-shaped section

Top surface

20mm

Appearances after
processing

8

Masstables9

Bent section

10

Affiliate
companies'
products

Side

35mm

Appearances after salt spray test

Acquiredcertifications
Certificates

Product shape

11

2mmR
35mm

6

Typicalapplications

20mm

2mmR

10mm

-4

Side

20mm

Appearances after
processing-5

AlkaliSolvent
resistance resistance

Elution of chromium: Amount of chromium elution measured after the specimen has been immersed for 3 minutes in boiling water
Corrosion resistance: Salt spray test (JIS Z2371)
Coefficient of dynamic friction: Reference sheet: SUS304BA, load: 0.98 N, sliding rate: 150 mm/min
Contact resistance value: Measured by the four-terminal, four-probe method (Dia Instruments MCP-TPO3P)
Alkali resistance: Appearance after immersion for 2 minutes in alkali degreasing agent (Nippon Paint SD-270) adjusted to pH of 12 and a temperature of 40ºC
Fingerprint resistance: Difference in brightness (ΔL) before and after impression with artificial finger-smudge solution (JIS K2246)
Solvent resistance: Appearance after immersion for 2 minutes in acetone(Evaluation standard for alkali resistance and solvent resistance/ ○ : No change, △ : Some discoloration, × : Film peeling)

・Drawn into a hat-shaped section

Top surface

Standards

Coefficientof dynamic
friction

Elution ofchromium

35mm

Precautions

10mm

Test pieces
・ZJ treatment: Coating weight symbol 90, thickness: 0.8 mm
・ZC treatment: Coating weight symbol 90, thickness: 0.8 mm

26

4 Chromium-free treatment

TM

ZP treatment Chromium-free phosphate treatment

ZPG treatment Chromium-free low-gloss treatment
Postpaintability① Superior paintability
This material has superior paint adhesion, making it possible
to omit the process of pre-paint surface preparation.
② Excellent corrosion resistance after painting
Processed and spot welded parts of the material also exhibit
excellent corrosion resistance after painting.

1

What isZAM™?

② Superior corrosion resistance
Sealed with an organic film, this material has superior
corrosion resistance.

5μm(Photo of phosphate treatment film)

Chromium-free phosphate treatment film

③ Superior compatibility with the environment
The resultant material is friendly to the environment because
its film is entirely free of chromium.

Antidazzle
property① Excellent antidazzle property
This material features low metallic luster, reducing reflectionof sunlight.

Chromium-free organic phosphate treatment film™

ZAM coating layer③ Superior compatibility with the environment
The resultant material is friendly to the environment because
its film is entirely free of chromium.

ZAM™ coating layer
Steel sheet④ “Plus” high coating performance

Steel sheet

2

Manufacturing
process3

Qualitycharacteristics④ “Plus” high antiglade performance

4

Chromium-freetreatment

5Standards

6

Quality characteristics

SampleElution ofchromium

Corrosion
resistance (before
painting)(8 hrs of SST)

Primaryadhesion

Secondaryadhesion

Paint adhesion

Corrosion resistanceafter painting (150
cycles of CCT)

Name

Treatment

ZAM

ZP treatment

No elution

○

○

○

◎

Galvanealed Steel

Chromate treatment

Elution

○

○

○

○

Electrolytic Zinc-coatedsteel

Chromate-free
Phosphate treatment

No elution

○

○

○

△

™

The above data is an example of our products.
Elution of chromium: Amount of chromium elution measured after the specimen has been immersed for 3 minutes in boiling water
Corrosion resistance: Salt spray test (JIS Z2371) 8 hrs ( ○：White rust occurrence 10% or less, ×：white rust occurrence more than 10%)
Paint adhesion: Primary adhesion: Lattice pattern (1 mm) cutting and cellophane tape peeling test ( ○ : no peeling, × : peeling)
Secondary adhesion: After immersion for 2 hours in hot water (90ºC), lattice pattern cutting and cellophane tape peeling test ( ○ : no peeling,× : peeling)
Corrosion resistance after painting: Combined-cycle test (JIS G0594) 150 cycles (superior ◎ ○ △ inferior)
Paint adhesion for ZP treatment

SampleZAM
ZP treatment™

Comparison between chromate
and low-gloss treatments

60º specular gloss (10 points on average) JIS Z8741

26

Low-gloss fluorine
painted steel sheet

28

8

Mass
tables

Chromate
treatment

130
0

50

100

9

150

Typicalapplications

Reflection ratio

Chromate treatment

10

Corrosion resistance after painting (after 150 cycles of CCT)

Galvanealed
steel
Chromate
treatment

Electrolytic
Zinc-coated steel
Chromate-free
Phosphatetreatment

Sample7

Acquiredcertifications
Certificates(60º gloss)

ZAM™ ZPG
treatment

Examplesofprocessed
products

Affiliate
companies'
products

Electrolytic
Galvanealed
Zinc-coated steel
steel
ZAM
Chromate-free
ZP treatment Chromate
Phosphatetreatment
treatment™

11

Precautions

Secondaryadhesion
Cross-cut
section<Painting conditions>
Acrylic paint (30μm: spraying + baking finish)<Samples>・ZAM™ ZP treatment steel : Thickness: 0.8 mm, one-side coating weight: 47 g/m 2
・Galvanealed steel Chromate treatment : Thickness: 0.8 mm, one-side coating weight: 40 g/m 2
・Electrolytic Zinc-coated steel Chromate-free Phosphate treatment : Thickness: 0.8 mm,
one-side coating weight: 10 g/m 2<Paintability evaluation>
・Secondary adhesion: After immersion for 2 hours in hot water (90ºC),
lattice pattern cutting and cellophane tape peeling test
<Corrosion resistance evaluation>
・Combined-cycle test (JIS G0594)
1 hr of SST → 4 hrs of drying (50ºC) → 3 hrs of BBT (50ºC, 95%RH or higher)

27

ZPG treatment

Spot welded
sectionApplication example to sound insulation wall28

5 Standards

TM

NIPPON STEEL Standard

Mechanical properties(1) Bendability
When the bendability of flat sheets and coils is tested according to the following table, coating peel-off, cracking of the base sheet (tothe extent it can be confirmed with the naked eye), or ruptures should not occur on the surface (measured at min. 7 mm from eachlongitudinal edge of the test piece).

Types and symbols
See the following tables for the types of sheets and coils available.
Types and symbols (in the case of hot-rolled base sheets)

Types and symbols (In the case of cold-rolled base sheets)

Type
Product
symbolBase sheet Application
classificatio
symbolApplication

Product
symbolBase sheet Application
classificatio
symbolH

C

General use

MSM

C

C

General use

MSM

H

D＊

Drawing

MSM

C

D

Drawing

MSM

H

K370

Class 370N for structural use

MSM

C

E

Deep drawing

MSM

H

K390

Class 390N for structural use

MSM

C

U＊

Ultra-deep drawing

MSM

H

K400

Class 400N for structural use

MSM

C

K370

Class 370N for structural use

H

K440 ＊Class 440N for structural use

MSM

C

K390

Class 390N for structural use

MSM

HK490 ＊Class 490N for structural use

MSM

C

K400

Class 400N for structural use

MSM

HK540 ＊Class 540N for structural use

MSM

C

K440

Class 440N for structural use

MSM

HWhat isZAM™?

Application

MSM

MSM

1

Type

K590 ＊Class 590N for structural use

MSM

Remarks:Contact us for the products marked with an asterisk (*) and other grades
not listed here.
:If no hot-rolled sheet is designated for a thickness between 1.6mm and
3.2mm, there may be cases where cold-rolled sheets satisfying the hotrolled base sheet specifications are used.

MSM

C
C

K490 ＊K540 ＊

Bendability

Symbol of the type
(Cold- or hot-rolled base sheet)

Class 490N for structural use
Class 540N for structural use

MSM

CK570 ＊Class 570N for structural use

MSM

CK590 ＊Class 590N for structural use

2

Bending angle of 180°

Manufacturing
process

Nominal thickness
Under 1.6 mm

Nominal thickness
1.6 mm or more, less than 3.0 mm

Nominal thickness
3.0 mm and overCoating weight symbol(Upper: NIPPON STEEL Standard 1,
lower: NIPPON STEEL Standard 2)

Coating weight symbol(Upper: NIPPON STEEL Standard 1,
lower: NIPPON STEEL Standard 2)

Coating weight symbol(Upper: NIPPON STEEL Standard 1,
lower: NIPPON STEEL Standard 2)

K27 or lower
190 or lower

K27 or lower
190 or lower

K27 or lower
190 or less

K35

K45
300

K35

K45
300

K35

K45
300

General use

1

1

2

1

2

2

2

2

2

Drawing

1

̶

̶

1

̶

̶

̶

̶

̶

Deep drawing / Ultra-deep drawing

0

̶

̶

0

̶

̶

̶

̶

̶

Class 370N for structural use

1

1

2

1

1

2

2

2

3

Class 390 / 400N for structural use

2

2

2

2

2

2

3

3

3

Class 440 / 490 / 500 / 540N
for structural use

3

3

3

3

3

3

3

3

3

Class 590N for structural use

̶

̶

̶

̶

̶

̶

̶

̶

̶

Remarks 1: In the case of hot-rolled sheets, nominal thicknesses of 1.6 mm and over apply.
2: The figures in the table are the numbers of sheets of the nominal thickness at the inside spacing of the bend.
3: The deep drawing and ultra-deep drawing columns apply only to cold-rolled sheets.

3

Qualitycharacteristics

4

Chromium-freetreatment

5Standards

6

Examplesofprocessed
products

Surface finish

7(2) Tensile tests
The following table shows the yield point, tensile strength, and elongation of flat sheets and coils.

The standard surface finish is skin-passed (symbol: D).

Acquiredcertifications
Certificates

Yield point, tensile strength, and elongation

Coating mass

Chemical treatments and oiling

Products can be manufactured with the coating weights listed in thefollowing table.

Application

Minimum
Symbolaverage coating(NIPPONmass at
STEEL
triple-spot test
Standard 1)(g/m2)

̶

Min. 270

Chemical conversion treatment types and symbols

Minimum
Symbolaverage coating(NIPPONmass at
STEEL
triple-spot test
Standard 2)(g/m2)

Minimum
coatingmass ata single spot
(g/m2)

K 06＊

60

51

45

70

60

K 08

80

68

60

90

77

Chemical conversion treatment

SymbolChromium-free inorganic treatment

ZC

Chromium-free organic special treatment

ZG

Chromium-free organic lubrication treatment

ZJ

Chromium-free phosphate treatment

ZP
ZPG

K 10

100

85

—

̶

̶

Chromium-free low-gross treatment

K 12

120

102

—

̶

̶

High corrosion-resistance chromate

A

UntreatedM

Deep drawing application

̶

Min. 270

Elongation
Nominal thickness (mm)(%)

0.4 incl. to under 0.6

Min. 34

0.6 incl. to under 1.0

Min. 36

1.0 incl. to under 1.6

Min. 37

1.6 incl. to 2.3 incl.

Min. 38

0.4 incl. to under 0.6

Min. 36

0.6 incl. to under 1.0

Min. 38

1.0 incl. to under 1.6

Min. 39

1.6 incl. to 2.3 incl.

Min. 40

0.6 incl. to under 1.0

Min. 40

1.0 incl. to under 1.6

Min. 41

1.6 incl. to 2.3 incl.

Min. 42

Ultra-deep drawing application

̶

Min. 270

Class 370N for structural use

Min. 265

Min. 370

Min. 18

Class 390N for structural use

Min. 285

Min. 390

Min. 18

Class 400N for structural use

Min. 295

Min. 400

Min. 18

K 14

140

119

90

140

119

K 18

180

153

120

190

162

K 20

200

170

—

̶

̶

K 22

220

187

150

230

196

Oiling types and symbols

Class 440N for structural use

Min. 335

Min. 440

K 25

250

213

—

̶

̶

Type of oiling

SymbolClass 490N for structural use

Min. 365

Min. 490

K 27

275

234

190

290

247

OilingO

Class 540N for structural use

Min. 400

Min. 540

Min. 16

K 35＊

350

298

—

̶

̶

No oiling

No symbol

Class 570N for structural use

Min. 560

Min. 570

̶

K 45＊

450

383

300＊

500

425

Class 590N for structural use

Min. 560

Min. 590

̶

Notes

29

Minimum
coatingmass ata single spot
(g/m2)

Tensile strength(N/mm2)

Chemical conversion treatments and oiling are
performed according to the following tables.
Drawing application

Minimum coating mass (total mass on both sides)

Yield point(N/mm2)

1: Coating weight can be specified by NIPPON STEEL Standard 1 or 2.
2: The coating weight symbol in NIPPON STEEL Standard 2 represents the coating weighton one side (g/m2).
3: For items marked ＊, contact us for information.

Remarks: For items not listed above, contact us.

Applies to 0.4 mm and over
Reference value for under 0.4 mm

8Mass
tables9

Typicalapplications

10

Affiliate
companies'
products

11

Precautions

Min. 18
Min. 16

Remarks: Deep drawing and ultra-deep drawing columns apply only to cold-rolled sheets.

30

5 Standards

TM

Size tolerances

Chemical composition(1) Thickness tolerances
In the case where base sheet thicknesses are indicated, the following coating weights should be added to such respective thicknesses
to identify the applicable size tolerances. (before coating thickness)
In the case where coated sheet thicknesses are indicated, size tolerances for such thicknesses apply. (after coating thickness)
The thickness tolerance is according to the following table. The thickness is measured at any point no less than 25 mm from the edge.

Thickness tolerances
Cold-rolled base steel
Width(Unit: mm)

Under 630

Nominalthickness

630 to under
1,000 to1,000
under 1,250

Hot-rolled base steel
Width1,250 to1,325 incl.

Nominalthickness(Unit: wt%)

Cold-rolled sheet

Application symbol

C

Si

Mn

P

S

Application symbol

C

Si

Mn

P

S

C

Max. 0.15

̶

Max. 0.80

Max. 0.05

Max. 0.05

C

Max. 0.15

̶

Max. 0.80

Max. 0.05

Max. 0.05

K400

Max. 0.25

̶

Max. 1.70

Max. 0.20

Max. 0.05

D

Max. 0.12

̶

Max. 0.60

Max. 0.04

Max. 0.04

K440

Max. 0.25

̶

Max. 2.00

Max. 0.20

Max. 0.05

E

Max. 0.10

̶

Max. 0.45

Max. 0.03

Max. 0.03

K490

Max. 0.30

̶Max. 2.00

Max. 0.20

Max. 0.05

U

Max. 0.08

̶

Max. 0.45

Max. 0.03

Max. 0.03

K540

Max. 0.30

̶Max. 2.50

Max. 0.20

Max. 0.05

K400

Max. 0.25

̶

Max. 1.70

Max. 0.20

Max. 0.05

K440

Max. 0.25

̶

Max. 2.00

Max. 0.20

Max. 0.05

K490

Max. 0.30

̶Max. 2.00

Max. 0.20

Max. 0.05

K570

Max. 0.30

̶Max. 2.50

Max. 0.20

Max. 0.05(Unit: mm)

600 to under
1,200 to1,200
under 1,325

0.25 incl. to under 0.40

± 0.05± 0.05± 0.05± 0.061.60 incl. to under 2.30

± 0.17± 0.180.40 incl. to under 0.60

± 0.06± 0.06± 0.06± 0.072.30 incl. to under 2.50

± 0.18± 0.200.60 incl. to under 0.80

± 0.07± 0.07± 0.07± 0.072.50 incl. to under 3.20

± 0.20± 0.220.80 incl. to under 1.00

± 0.07± 0.07± 0.08± 0.093.20 incl. to under 4.00

± 0.22± 0.241.00 incl. to under 1.25

± 0.08± 0.08± 0.09± 0.104.00 incl. to under 5.00

± 0.25± 0.271.25 incl. to under 1.60

± 0.09± 0.10± 0.11± 0.125.00 incl. to under 6.00

± 0.27± 0.291.60 incl. to under 2.00

± 0.11± 0.12± 0.13± 0.146.00± 0.30± 0.312.00 incl. to 2.30 incl.

± 0.13± 0.14± 0.15± 0.16

Thickness is measured at any point no less than 25 mm from the edge.

Hot-rolled sheet(Unit: wt%)

Thickness is measured at any point no less than 25
mm from the edge.

K06

K08

K10

K12

K14

K18

K20

K22

K25

K27

K35

K45

Equivalent coating thickness(mm, total of both sides)

0.015

0.020

0.025

0.031

0.034

0.041

0.048

0.051

0.059

0.064

0.076

0.094

Coating mass symbol
NIPPON STEEL Standard 2

45

60

—

—

90

120

—

150

—

190

—

300

5

Equivalent coating thickness(mm, total of both sides)

0.015

7

0.050

̶

0.063

̶

0.100

1,250

Width (mm)● The coating density of ZAM ™ for calculating thickness of coating layer : 6.0g /cm 3(2) Width and length tolerances
The width and length tolerances are shown in the following tables.

1,050

Length tolerance (flat sheets)
Width tolerance

Wide coils and flat sheets＋ 25mm,-0＋ X , -0

＋ 10mm,-0Remarks: X may be set anywhere in the range of 2 to 15.

＋ 7mm,-0＋ 3mm,

-0

600
0.25

0.8

2.3

1.6

6.0

0.35

Length tolerance (mm)Thickness (mm)Thickness (mm)9Typicalapplications

10

Affiliate
companies'
products± 0.5mm

Slit coils

8

Masstables600

Width tolerances

Acquiredcertifications
Certificates

1,325

Width (mm)̶

Examplesofprocessed
products

Hot-rolled sheet

1,325

Product shapeStandards

6
Cold-rolled sheet

0.040

3

Available sizes

Coating mass symbol
NIPPON STEEL Standard 1

0.030

Manufacturing
process

Chromium-freetreatment

・For sizes other than those shown in the figure below, consult us.

̶

2

4

・The production range varies depending on the specifications. For details contact us.

̶What is
ZAM™?

Qualitycharacteristics

Corresponding coating thickness

0.020

1

± 0.3mm11

Precautions

Standard labeling method

Label examples

MS M - □ △△△△ - △ △△ ＊＊ ＊①②③

① ZAM™ product symbol② Base sheet classification(H: hot-rolled, C: Cold-rolled)③ Application symbol

31

④

⑤

④ Surface finish⑤ Chemical conversion
treatment and oiling⑥ Coating mass symbol⑥

Example 1

Example 2

MSM - CC - DZC 90

MSM - HK400 - DZG K27

Type: Cold-rolled base sheet
for general use
Post-treatment: Chromium-freeinorganic treatment
Coating mass: 140 g/m2 (minimum
value on both sides)

Type: Class 400N hot-rolled sheet
for structural use
Post-treatment: Chromium-freeorganic special treatment
Coating mass: 275 g/m2 (minimum
value on both sides)32

5 Standards

TM

Chemical Requirements A

ASTM A1046/A1046M - 09 (Excerpts From ASTM Standard)

Designation
SS Grade33[230]37[255]40[275]50[340] Class1. 2 and 4
50[340] Class3
80[550]HSLAS E40[275]50[340]60[410]70[480]80[550]HSLAS-F F
40[275]50[340]60[410]70[480]80[550]Standard Specification for Steel Sheet, Zinc-Aluminum-Magnesium Alloy-Coatedby the Hot-Dip ProcessThis specification is applicable to orders in either inch-pound units (as A 1046) or SI units (as A 1046M).
Values in inch-pound and SI units are not necessarily equivalent.
Within the text, SI units are shown in brackets. Each system shall be used independently of the other.

1. Weight (Mass) of Coating
Weight [Mass] of Coating Requirement A
Inch-Pound Units
Minimum Requirement
Coating Designation

Triple-Spot Test
Total Both Sides, oz/ft 2
0.20
0.30
0.40
0.60
0.75
0.90
1.15
1.40
1.65
2.10

ZM20
ZM30
ZM40
ZM60
ZM75
ZM90
ZM115
ZM140
ZM165
ZM210

Single-Spot Test
Total Both Sides, oz/ft 2
0.16
0.25
0.30
0.50
0.65
0.80
1.00
1.20
1.40
1.80

Composition, %-Heat Analysis Element. max (unless otherwise shown)
P
S
Cu
Ni
Cr
Mo

C

Mn

0.20
0.20
0.25
0.25
0.25
0.20

̶
̶
̶
̶
̶
̶

0.04
0.10
0.10
0.20
0.04
0.04

0.040
0.040
0.040
0.040
0.040
0.040

0.20
0.20
0.20
0.20
0.20
0.20

0.20
0.20
0.20
0.20
0.20
0.20

0.15
0.15
0.15
0.15
0.15
0.15

0.20
0.20
0.20
0.20
0.20

1.50
1.50
1.50
1.65
1.65

̶
̶
̶
̶
̶

0.035
0.035
0.035
0.035
0.035

̶
0.20
0.20
0.20
0.20

0.20
0.20
0.20
0.20
0.20

0.15
0.15
0.15
0.15
0.15

1.50
1.50
1.50
1.65
1.65

̶
̶
̶
̶
̶

0.035
0.035
0.035
0.035
0.035

̶
0.20
0.20
0.20
0.20

0.20
0.20
0.20
0.20
0.20

ZMM60
ZMM90
ZMM120ZMM180
ZMM220
ZMM275
ZMM350ZMM450
ZMM500
ZMM600A

Designation

SS

HSLAS

Designation

Chemical Requirements A

CS Type B C. F
CS Type C C. D. E
FS Type A C. G
FS Type B C. F
DDS D. E. H
EDDS H. I

0.60

0.030

0.035

̶

0.20

0.20

0.15

0.60
0.50

0.100
0.020

0.035
0.035

̶
̶

0.20
0.20

0.20
0.20

0.50

0.020

0.030

̶

0.20

0.50
0.40

0.020
0.020

0.025
0.020

0.01
0.01

0.20
0.20

0.008
0.008
0.008
0.008
0.008
0.015

0.025
0.025
0.025
0.025
0.025
0.025

̶
̶

0.15
0.15
0.15
0.15
0.15

0.16
0.16
0.16
0.16
0.16

0.01min
0.01min
0.01min
0.01min
0.01min0.005min
0.005min
0.005min
0.005min
0.005min

0.01min
0.01min
0.01min
0.01min
0.01min

̶
̶
̶
̶
̶

0.15
0.15
0.15
0.15
0.15

0.16
0.16
0.16
0.16
0.16

0.01min
0.01min
0.01min
0.01min
0.01min0.005min
0.005min
0.005min
0.005min
0.005min

0.01min
0.01min
0.01min
0.01min
0.01min

̶
̶
̶
̶
̶

V
0.008

Cb
0.008

Ti B
0.025

N
̶

0.06

0.008

0.008

0.025

̶

0.15
0.15

0.06
0.06

0.008
0.008

0.008
0.008

0.025
0.025

̶
̶

0.20

0.15

0.06

0.008

0.008

0.025

̶

0.20
0.20

0.15
0.15

0.06
0.06

0.008
0.10

0.008
0.10

0.025
0.15

̶
̶

Where an ellipsis (̶) appears in this table, there is no requirement, but the analysis shall be reported.
For steels containing more than 0.02% carbon, titanium is permitted to 0.025% provided the ratio of % titanium to % nitrogen does not exceed 3.4,
When a deoxidized steel is required for the application, the purchaser has the option to order CS and FS to a minimum of 0.01% total aluminum.
D
Steel is permitted to be fumished as a vacuum degassed or chemically stabilized steel, or both, at the producer s option.
E
For carbon levels less than or equal to 0.02%,vanadium, columbium, or titanium, or combinations thereof are permitted to be used as stabilizing elements at the producer's option. In
such cases, the applicable limit for vanadium and columbium shall be 0.10% max, and the limit for titanium shall be 0.15% maz.
F
For CS and FS, specify Type B to avoid carbon levels below 0.02%
G
Shall not be furnished as a stabilized steel.
H
Minimum Al content is not required if agreed to by purchaser and supplier.
I
Shall be fumished as a stabilized steel.

SS

HSLAS

A

B

C

HSLAS-F

1

What isZAM™?

2Manufacturing
process3

Qualitycharacteristics

4

Chromium-freetreatment

5

Grade
33
37
40
50 Class1
50 Class2
50 Class3
50 Class4
80 B
40
50
60
70
80
40
50
60
70
80

2. Chemical Composition

Mn
0.60

0.008
0.008
0.008
0.008
0.008
0.008

Standards

Mechanical Property Requirements, Base Metal (Longitudinal)

HSLAS-F

C
0.10
0.02
to 0.15
0.08
0.10
0.02
to 0.10
0.06
0.02

0.06
0.06
0.06
0.06
0.06
0.06

3. Mechanical Properties

The coating designation number is the term by which this product is specified. Because of the many variables and changing conditions that are characteristic of coutinuous hot-dip
coating lines, the weight [mass] of the coating is not always evenly divided between the two surfaces of a sheet, nor is the coating evenly distributed from edge to edge. However, it
can normally be expected that not less than 40% of the single-spot test limit will be found on either surface.

Designation
CS Type A C. D. E

N

Where an ellipsis(̶)appears in this table there is no requirement, but the analysis shall be reported.
For carbon levels less than or equal to 0.02%, vanadium, columbium or titanium, or combinations thereof, are permitted to be used as stabilizing elements at the producer' s option.
In such cases, the applicable limit for vanadium and columbium shall be 0.10 % max. and the limit for titanium shall be 0.15 % max.
C
Titanium is permitted for SS steels to 0.025% provided the ratio of % titanium to % nitrogen does not exceed 3.4.
DFor steels containing more than 0.02 % carbon, titanium is permitted to 0.025%, provided the ratio of % titanium to % nitrogen does not exceed 3.4.
E
HSLAS and HSLAS-F steels commonly contain the strengthening elements columbium, vanadium, and titanium added singly or in combination. The minimum requirements only
apply to the microalloy elements selected for strengthening of the steel.
F
The producer has the option to treat HSLAS-F steels by means of small alloy additions to effect sulfide inclusion control.

Single-Spot Test
Total Both Sides, g/m 2
50
75
90
150
190
235
300
385
425
510

Composition, %-Heat Analysis Element, max (unless otherwise shown)
P
S
Al,min
Cu
Ni
Cr
Mo
0.030
0.035
̶
0.20
0.20
0.15
0.06

Ti B C D

B

Minimum Requirement
Triple-Spot Test
Total Both Sides, g/m 2
60
90
120
180
220
275
350
450
500
600

Cb B

A

SI Units
Coating Designation

VB

Grade
230
255
275
340 Class1
340 Class2
340 Class3
340 Class4
550 B
275
340
410
480
550
275
340
410
480
550

Inch-Pound Units
Yield Strength min, ksi

Tensile Strength min, ksi A

Elongation in 2 in.. min.% A

33
37
40
50
50
50
50
80 C
40
50
60
70
80
40
50
60
70
80

45
52
55
65
̶
70
60
82
50 D
60 D
70 D
80 D
90 D
50 D
60 D
70 D
80 D
90 D

20
18
16
12
12
12
12
̶
22
20
16
12
10
24
22
18
14
12

SI Units
Yield Strength min, MPa

Tensile Strength min, MPa A

Elongation in 50 mm, min.% A

230
255
275
340
340
340
340
550 C
275
340
410
480
550
275
340
410
480
550

310
360
380
450
̶
480
410
570
340 D
410 D
480 D
550 D
620 D
340 D
410 D
480 D
550 D
620 D

20
18
16
12
12
12
12
̶
22
20
16
12
10
24
22
18
14
12

6

Examplesofprocessed
products

7

Acquiredcertifications
Certificates8

Masstables9

Typicalapplications

10

Affiliate
companies'
products

11

Precautions

Where an ellipsis (̶) appears in this table there is no requirement.
For sheet thickness of 0.028 in.[0.71 mm] or thinner, no tension test is required if the hardness result in Rockwell B 85 or higher.
As there is no discontinuous yield curve, the yield strength should be taken as the stress at 0.5 % elongation under load or 0.2 % offset.
D
If a higher tensile strength is required, the user should consult the producer.
A

B

C

33

34

5 Standards

TM

Typical Ranges of Mechanical Properties (Nonmandatory) A, B

AS 1397 (Excerpts From Australian Standard)(Longitudinal Direction)r m Value C

N Value D

≧ 20

E

E

[205/380]

≧ 20

E

E

[170/410]

≧ 15

E

E

25/45

[170/310]≧ 26

1.0/1.4

0.17/0.21

1. Chemical Composition

3. Coating Mass

DDS

20/35

[140/240]≧ 32

1.4/1.8

0.19/0.24

Requirements For Chemical Composition

Coating Mass Requirements : Type 'ZM' Coatings

EDDS F

15/25[105/170]≧ 40

1.6/2.1

0.22/0.27

Designation

Yield Strength
ksi

MPa

Elongation in
2 in. [50mm]%

CS TypeA

25/55[170/380]

CS TypeB

30/55

CS TypeC

25/60

FS TypesA and B

Continuous hot-dip metallic coated steel sheet and strip–Coatings of zinc and zinc alloyed with aluminum and magnesium

The typical mechanical property values presented here are nonmandatory. They are intended solely to provide the purchaser with as much information as possible to make an
informed decision on the steel to be specified. Values outside of these ranges are to be expected. The purchaser may negotiate with the supplier if a specific range or a more
restrictive range is required for the application.
B
These typical mechanical properties apply to the full range of steel sheet thicknesses. The yield strength tends to increase and some of the formability values tend to decrease as the
sheet thickness decreases.
C rm Value - Average plastic strain ratio as determined by Test Method E 517.
DN Value-Strain-hardening exponent as determined by Test Method E 646.
E
No typical mechanical properties have been established.
F
EDDS Sheet will be free from changes in mechanical properties over time, that is, nonaging.
A

4. Bend Test

CS, FS, DDS, EDDS
Sheet Thickness

Coating
Designation A

Through0.039 in
0

Over
0.039
Through0.079 in

SSGrade B

Over
0.079 in

0

0

33
1½

37
2

HSLAS B

40
2½

40
1½

50
1½

HSLAS-F

60
3

40
1

50
1

60
1

70
1½

80
1½

ZM30

0

0

0

1½

2

2½

1½

1½

3

1

1

1

1½

1½

ZM40

0

0

0

1½

2

2½

1½

1½

3

1

1

1

1½

1½

ZM60

0

0

0

1½

2

2½

1½

1½

3

1

1

1

1½

1½

ZM70

0

0

0

1½

2

2½

1½

1½

3

1

1

1

1½

1½

ZM90

0

0

1

1½

2

2½

1½

1½

3

1

1

1

1½

1½

ZM115

0

0

1

1½

2

2½

1½

1½

3

1

1

1

1½

1½

ZM140

1

1

2

2

2

2½

ZM165

2

2

2

2

2

2½

ZM210

2

2

2

2

2

2½

CS, FS, DDS, EDDS
Sheet Thickness

Coating
Designation A

B
CSSGrade C

HSLAS CHSLAS-F

Through
1.0mm

Over 1.0
Through
2.0mm

Over
2.0mm

230

255

275

275

340

410

275

340

410

480

550

0

0

0

1½

2

2½

1½

1½

3

1

1

1

1½

1½

ZMM90

0

0

0

1½

2

2½

1½

1½

3

1

1

1

1½

1½

ZMM120

0

0

0

1½

2

2½

1½

1½

3

1

1

1

1½

1½

ZMM180

0

0

0

1½

2

2½

1½

1½

3

1

1

1

1½

1½

ZMM210

0

0

0

1½

2

2½

1½

1½

3

1

1

1

1½

1½

ZMM275

0

0

1

1½

2

2½

1½

1½

3

1

1

1

1½

1½

1½

1½

3

1

1

1

1½

1½

ZMM350

0

0

1

1½

2

2½

ZMM450

1

1

2

2

2

2½

ZMM500

2

2

2

2

2

2½

ZMM600

2

2

2

2

2

2½

If other coatings are required, the user should consult the producer for availability and suitable bend test requirements.
SS Grade 50 and 80 and HSLAS Grade 70 and 80 are not subject to bend test requirements.
SS Grade 340 and 550 and HSLAS Grade 480 and 550 are not subject to bend test requirements.

● The coating density of ZAM ™ for calculating thickness of coating layer : 6.0g /cm 3

35

0.20
0.30
0.12
0.10
0.08

1.20
1.60
0.50
0.45
0.40

0.040
0.100
0.040
0.030
0.020

Coating classdesignation

Sulfur
0.030
0.035
0.035
0.030
0.025

ZM60
ZM90
ZM120
ZM150
ZM180
ZM220
ZM275
ZM350
ZM450

NOTE: For grade G300, nitrogenized steel may be used for sections greater than
1.00 mm thick.

Steel grade
designation

SI-Units
Ratio of the Bend Diameter to Thickness of the Specimen (Any Direction)A

Manganese Phosphorus

Mechanical Property Requirements For Formability Grades
inch-pound Units
Ratio of the Bend Diameter to Thickness of the Specimen (Any Direction)

ZMM60

Chemical composition (cast analysis), % max.
CarbonMinimum coating mass, g/m 2
Total both surfaces
One surface
Triple spot
Single spot
Single spot
60
54
24
90
80
35
120
110
50
150
135
60
180
160
70
220
200
90
275
250
110
350
315
140
450
405
180

2. Mechanical Properties

Coating Bend Test Requirements

ZM20

Steel grade
designation
AS1397
G450, G500, G550
G300, G350 (see Note)
G250, G1
G2
G3

1

G1
G2 (Note 3)
G3 (Note 3)

Transverse tensile test (seeNote 1)
Min. elongation, %Transverse
bend test

on 50mm

on 80mm

Degree of
bend

̶
30
35

̶
27
32

180º
180º
180º

Thicknessrange forlockseam(see Note 2)mm̶≦ 1.60All

4. Coating Adhesion

Steel grade
designation
G250
G300
G350
G450
G500
G550
G1
G2
G3

Mechanical Property Requirements For Structural Grades
Transverse bend
test
DiameterMin. yield
Min.
Min.
elongation,
%
Angle
of
Steel
of
strengthtensile
(Note
2)
bend
grade
mandrel(Note 1) strength
designain terms
tionof
test pieceMPa
MPa
L 0 =50mm L 0 =80mm degrees thickness
(t )
G250
250
320
25
22
180
0
G300
300
340
20
18
180
t
G350
350
420
15
14
180
2t
G450
450
480
10
9
90
4t
(Note 3)
G500
500
520
8
7
90
6t
(Note 4)
G550
550
550
2
2
̶
̶
(Note 5)

2

Manufacturing
process3

Qualitycharacteristics

4

Chromium-freetreatment

Coating Adesion (180º Bend Test) Requirements

NOTES 1: Applies to test picces equal to or greater than 0.60 mm thick. Refer tosupplier for typical yield and tensile strengths for design purposes.
2: The ability of grades to lockseam is dependent on recognized profilingpractices and machine settings to avoid excessive stretching of the
product.
3: For information on fabricating characteristics see Paragraph D2 ofAppendix D.

Longitudinal tensile test

What is
ZAM™?

Diameter of mandrel in terms of thickness of product (t )Coating class
ZM90,
ZM120,ZM220,ZM350
ZM450
ZM150,ZM275
ZM180,
0
0
0
t
0
t
t
t
0
t
t
t
2t
2t
2t
t
2t
2t
2t
2t
2t
2t
2t
2t
0
0
0
t
0
0
0
t
0
0
0
t

5

Standards

6

Examplesofprocessed
products

7

Acquiredcertifications
Certificates

NOTE : 0 indicates that the coated steel is bent flat on iteself

NOTES 1: The yield strength is the lower yield stress. If well-defined yielding is not
obvious, the 0.2% proof stress should be determined.
2: Applies to test pieces equal to or greater than 0.6 mm in thickness. For
material up to 0.6 mm in thickness, the minimum elongation values inthe table are not covered by this standard.
L。=original gauge lenghth.
3: Applies to recovery annealed , i.e. not recrystallized after annealing,material equal to or greater than 1.50 mm thick.
4: Applies to recovery annealed ,i.e. not recrystallized after annealing,material between 1.00 mm and 1.50 mm thick.
5: Applies to recovery annealed, i.e. not recrystallized after annealing,material up to and including 1.00 mm thick; the values of yieldstrength,0.2% proof stress and tensile strength are, for practical
purposes, the same.

8

Masstables9

Typicalapplications

10

Affiliate
companies'
products

11

Precautions● The coating density of ZAM ™ for calculating thickness of coating layer : 6.0g /cm 336

6 Examples of processed products

7 Acquired certifications(Examples of processing performed by our company and its subsidiary companies)

Shaped steel

Light gauge
steel sections
for general structure( JIS G 3350 )Specialshaped steel

H-shaped steel(H-beams)

Steel pipe

Pre-notchedshaped steel

Carbon steel tubes
for general structure(JIS G 3444)

Lightweight welded
H-shaped steel(H-beams)
for general structure

OthersCorrugated sheet
Punching metal● Non-slip metal●●

Carbon steel square
and rectangular tubes
for general structure(JIS G 3466)Light grooved
shaped steel (Channel)

Hat-shaped steel

Lip shaped steel(Lipped channel)

Light mountainshaped steel (Angle)

List of building work technology/technology examination certifications
Certifications

TM

Shaped steel
produced by continuously shaping on thesame line steel strips
which have been
notched by a pressb e f o r e h a n d ( S t e el
strips pre-shaped andpre-notched with thepres s are continuously formed on thesame processing line.)

TM

Architecture execution technology
and technology examination
certification

Explanation

Certification number

Acquisition date

A "Construction execution technology
and technology examination
certificate" has been obtained from the
Building Center of Japan.

BCJ Examination certificate
No.85

October 2, 2005
Renewed July 10, 2015
Minor change April 19, 2019

As for chromium-free after-treatment,"Construction execution technology
and technology examination
certificate" has also been obtained
from the Building Center of Japan.

BCJ Examination certificate
No.138January 31, 2008
Renewed January 31, 2018
Minor change April 19, 2019

Examination certificate No.0122

March 18, 2002
Renewed March 18, 2017
Content change May 13, 2019

Construction technology
examination certification"Construction technology examination
certification" has been obtained fromthe Civil Engineering Research Center.

Law concerning promotion of
housing quality assurance, etc.

Under the provisions of the "Quality
Assurance Law," we have obtained
certification by the Minster of Land
Infrastructure and Transport for special
evaluation methods for degradation
measure classes (structures, etc.) to
be displayed in accordance with theJapan housing performance labelingstandards.

1

What isZAM™?

2Manufacturing
process3

Qualitycharacteristics

4

Chromium-freetreatment

Certification No.618

June 7, 2005

5

Standards

6

Light Z-shaped steel

Architecture standards law

Pre-notchedshaped steel
Round pipes

Corrugated sheet

Nippon Expressway Company
Limited New technology and newbuilding methods

New technology for Tokyo
expressways
Square pipes

Punching metal

Certification by the Minister of Land
Infrastructure and Transport has beenobtained as a product conforming to
the provisions of Item 2 of Article 37 of
the Building Standards Act.

Toyo Works MSTL-0064
Sakai Works MSTL-0065

The product is registered in a database of new technologies and new
construction methods of expressways
managed by NEXCO, Nippon Expressway Company Ltd.

200100085

The "high-durability hot-dip steel sheet
ZAM™ is mentioned on the Metropolitan
Expressway CO., Ltd. and in "Systems
u s i n g n e w te c h n o l o g y " ( i n te r n a lcompany database).

ー

December 21, 2001

Examplesofprocessed
products

7

Acquiredcertifications
Certificates

April 20, 2001

8

MasstablesNovember 20, 2007

9

Typicalapplications

10

Affiliate
companies'
products

11
Non-slip metal

General structure material
lightweight shaped steel(Light gauge steel sections
for general structure)37

Pre-notched shaped steel

Lightweight H-shaped steel(H-beams)

Precautions

Made-to-order:
Nippon Steel Coated Sheet
Corporation(Example of steel processedby a customer)38

7 CertificatesTM

Architecture execution technology andtechnology examination certificate

Construction technology examination
certificate

Architecture Standards Law certificate

Special evaluation certificate under the Law Concerning
Promotion of Housing Quality Assurance, etc.

Issued on October 2, 2005/Renewed on July 10, 2015/Minor change April 19, 2019

Issued on March 18, 2002/Renewed on March 18, 2017/Content change May 13, 2019

Issued on December 21, 2001

Issued on June 7, 2005

1

What isZAM™?

2Manufacturing
process3

Qualitycharacteristics

4

Chromium-freetreatment

5Standards

6

Examplesofprocessed
products

Issued on January 31, 2008/Renewed on January 31, 2018/Minor change April 19, 2019

We have obtained "Architecture execution technology
and technology examination certificate (BCJ examination
certificate No.85)" from the Building Center of Japan and"Construction technology examination cer tificate(construction technology examination cer tificate
No.0122)" from the Civil Engineering Research Center.
These awards attest that ZAM™ can "replace post hotdip zinc-coated steel sheets, having at least equivalentcorrosion resistance with only about one-sixth of thecoating weight."
Such technical information in these certifications does
not guarantee that any whatsoever of our products.

Certification by the Minister of Land, Infrastructure andTransport has been obtained proclaiming the product's
compliance with the provisions of the ArchitectureStandards Low, article 37, number 2.

Under the provisions of the "Quality Assurance Law,"certification by the Minister of Land ,Infrastructure andTransport has been obtained for special evaluation methods
to classify measures against degradation measures classes(structures, etc.) to be displayed in accordance with theJapan housing performance labeling standards. Withacquisition of this certification, performance of ZAM™ canbe labeled according to these standards.

7

Acquiredcertifications
Certificates8

Masstables9

Typicalapplications

10

Affiliate
companies'
products

11

Precautions

Also, acquisition of the Building Center of Japan "Construction technology examination certificate (building
technology)" (BCJ Examination certificate 138) certifies
that the chromium-free treatments (ZC treatment and ZG
treatment), which are ZAM™ , after-treatments, " havewhite-rust resistance that is at least equivalent to that ofhigh-corrosion-resistance chromate treatment (Atreatment), without using chromium."3940

8 Mass tables

TM

Mass of cut sheets

Mass of cut sheets

The mass of a cut sheet is expressed in kilograms and is stated as theoretical mass.

ZAM™ Mass table for coating mass symbol 60

Coating mass
symbol 60

ZAM™ Mass table for coating mass symbol 90

ZAM™ Mass table for coating mass symbol K08

ZAM™ Mass table for coating mass symbol K14

1

Nominal size

3×6

4×8

Nominal size

3×6

4×8

Nominal size

3×6

4×8

Nominal size

3×6

4×8

Width (mm)

914

1,219

Width (mm)

914

1,219

Width (mm)

914

1,219

Width (mm)

914

1,219

Length (mm)

1,829

2,438

Length (mm)

1,829

2,438

Length (mm)

1,829

2,438

Length (mm)

1,829

2,438

(m2)

1.672

2.972

(m2)

1.672

2.972

(m2)

1.672

2.972

(m2)

1.672

2.972

Area
Coating mass constaintCoating mass
symbol 90

Area

0.120

Coating mass constaint0.180

Coating mass
symbol K08

Area
Coating mass constaintCoating mass
symbol K14

Area

0.120

Thickness (mm)Unit mass (kg/m2)

Mass/sheet (kg)

Mass/sheet (kg)Thickness (mm)Unit mass (kg/m2)

Mass/sheet (kg)

Mass/sheet (kg)Thickness (mm)Unit mass (kg/m2)

0.27

2.240

3.75

6.66

0.27

2.300

3.85

6.83

0.27

2.240

0.3

2.475

4.14

7.36

0.3

2.535

4.24

7.53

0.3

2.475

0.4

3.260

5.45

9.69

0.4

3.320

5.55

9.87

0.4

3.260

0.5

4.045

6.76

12.0

0.5

4.105

6.86

12.2

0.5

4.045

Coating mass constaint

Mass/sheet (kg)

Mass/sheet (kg)Thickness (mm)

3.74

6.66

4.14

7.36

5.45
6.76

What is
ZAM™?

2

0.203
Unit mass (kg/m2)

Mass/sheet (kg)

Mass/sheet (kg)

0.27

2.323

3.88

6.90

0.3

2.558

4.28

7.60

9.69

0.4

3.343

5.59

9.94

12.0

0.5

4.128

6.90

12.3

0.6

4.830

8.08

14.4

0.6

4.890

8.18

14.5

0.6

4.830

8.07

14.4

0.6

4.913

8.21

14.6

0.8

6.400

10.7

19.0

0.8

6.460

10.8

19.2

0.8

6.400

10.7

19.0

0.8

6.483

10.8

19.3

1.0

7.970

13.3

23.7

1.0

8.030

13.4

23.9

1.0

7.970

13.3

23.7

1.0

8.053

13.5

23.9

1.2

9.540

16.0

28.4

1.2

9.600

16.1

28.5

1.2

9.540

15.9

28.4

1.2

9.623

16.1

28.6

1.6

12.68

21.2

37.7

1.6

12.74

21.3

37.9

1.6

12.68

21.2

37.7

1.6

12.76

21.3

37.9

2.0

15.82

26.5

47.0

2.0

15.88

26.6

47.2

2.0

15.82

26.4

47.0

2.0

15.90

26.6

47.3

2.3

18.18

30.4

54.0

2.3

18.24

30.5

54.2

2.3

18.18

30.4

54.0

2.3

18.26

30.5

54.3

3.2

25.24

42.2

75.0

3.2

25.30

42.3

75.2

3.2

25.24

42.2

75.0

3.2

25.32

42.3

75.2

4.0

31.52

52.7

93.7

4.0

31.58

52.8

93.9

4.0

31.52

52.7

93.7

4.0

31.60

52.8

93.9

4.5

35.44

59.3

105

4.5

35.50

59.4

106

4.5

35.45

59.3

105

4.5

35.53

59.4

106

6.0

47.22

79.0

140

6.0

47.28

79.1

141

6.0

47.22

78.9

140

6.0

47.30

79.1

141

Manufacturing
process3

Qualitycharacteristics

4

Chromium-freetreatment

5Standards

6

Examplesofprocessed
products

7
ZAM™ Mass table for coating mass symbol 120

Coating mass
symbol 120

Nominal size

3×6

4×8

Width (mm)

914

1,219

Length (mm)

1,829

2,438

(m2)

1.672

2.972

Area
Coating mass constaint41

ZAM™ Mass table for coating mass symbol 190

Coating mass
symbol 190

Nominal size

3×6

4×8

Width (mm)

914

1,219

Length (mm)

1,829

2,438

(m2)

1.672

2.972

Area

0.240

Coating mass constaintThickness (mm)Unit mass (kg/m2)

Mass/sheet (kg)

Mass/sheet (kg)Thickness (mm)

0.27

2.360

3.95

7.01

0.27

0.3

2.595

4.34

7.71

0.4

3.380

5.65

0.5

4.165

6.96

0.6

4.950

0.8

ZAM™ Mass table for coating mass symbol K18

0.380
Unit mass (kg/m2)

Coating mass
symbol K18

ZAM™ Mass table for coating mass symbol K27

Nominal size

3×6

4×8

Width (mm)

914

1,219

Length (mm)

1,829

2,438

(m2)

1.672

2.972

Area
Coating mass constaintAcquiredcertifications
Certificates

Coating mass
symbol K27

Nominal size

3×6

4×8

Width (mm)

914

1,219

Length (mm)

1,829

2,438

(m2)

1.672

2.972

Area

0.244

Coating mass constaint8

Masstables0.381

Mass/sheet (kg)

Mass/sheet (kg)Thickness (mm)Unit mass (kg/m2)

Mass/sheet (kg)

Mass/sheet (kg)Thickness (mm)Unit mass (kg/m2)

Mass/sheet (kg)

Mass/sheet (kg)

2.500

4.18

7.43

0.27

2.364

3.95

7.03

0.27

2.501

4.18

7.43

0.3

2.735

4.57

8.13

0.3

2.599

4.34

7.72

0.3

2.736

4.57

8.13

10.0

0.4

3.520

5.89

10.5

0.4

3.384

5.66

10.1

0.4

3.521

5.89

10.5

12.4

0.5

4.305

7.20

12.8

0.5

4.169

6.97

12.4

0.5

4.306

7.20

12.8

8.28

14.7

0.6

5.090

8.51

15.1

0.6

4.954

8.28

14.7

0.6

5.091

8.51

15.1

6.520

10.9

19.4

0.8

6.660

11.1

19.8

0.8

6.524

10.9

19.4

0.8

6.661

11.1

19.8

1.0

8.090

13.5

24.0

1.0

8.230

13.8

24.5

1.0

8.094

13.5

24.1

1.0

8.231

13.8

24.5

1.2

9.660

16.2

28.7

1.2

9.800

16.4

29.1

1.2

9.664

16.2

28.7

1.2

9.801

16.4

29.1

1.6

12.80

21.4

38.0

1.6

12.94

21.6

38.5

1.6

12.80

21.4

38.1

1.6

12.94

21.6

38.5

2.0

15.94

26.7

47.4

2.0

16.08

26.9

47.8

2.0

15.94

26.6

47.4

2.0

16.08

26.9

47.8

2.3

18.30

30.6

54.4

2.3

18.44

30.8

54.8

2.3

18.30

30.6

54.4

2.3

18.44

30.8

54.8

3.2

25.36

42.4

75.4

3.2

25.50

42.6

75.8

3.2

25.36

42.4

75.4

3.2

25.50

42.6

75.8

4.0

31.64

52.9

94.0

4.0

31.78

53.1

94.5

4.0

31.64

52.9

94.0

4.0

31.78

53.1

94.4

4.5

35.56

59.5

106

4.5

35.70

59.7

106

4.5

35.57

59.5

106

4.5

35.71

59.7

106

6.0

47.34

79.2

141

6.0

47.48

79.4

141

6.0

47.34

79.1

141

6.0

47.48

79.4

141

9

Typicalapplications

10

Affiliate
companies'
products

11

Precautions

Coating mass symbol

45

60

90

120

150

190

300

Coating mass symbol

K06

K08

K10

K12

K14

K18

K20

K22

K25

K27

K35

K45

Coating mass constant

0.090

0.120

0.180

0.240

0.300

0.380

0.600

Coating mass constant

0.090

0.120

0.150

0.183

0.203

0.244

0.285

0.305

0.350

0.381

0.458

0.565

42

9 Typical applications

TM

Construction
Road/civil engineering

Railroad

Farming▲ Heavy-duty shutter

Construction▲ Refrigerant duct

▲ Sound barrier louver▲ Indoor baseball field▲ Ceiling crosspiece

Housing

Others▲ House frame

Farming
9

Typicalapplications▲ Greenhouse▲▼ Henhouse roof

▲ Compost house▲ Compost house▲ Grape arbor prop

▲ Fish preserve (frame)

①
●
②
●

(Enlarged view)▲ Greenhouse43▲ Cropper ❶ rotary case ❷ Front cover44

9 Typical applications

TM

Road / Civil engineering

Railroad(Enlarged view)Rock bolt (section)▲ Pipe for joining bolt of concrete block▲ Rock bolt

(Enlarged view)(Enlarged view)▲ Bridge reinforcing plate (steel plate adhesion method)
ZAM™ ZKS processing, ZAM Grout▲ Sound barrier louver (station building)▲ Wind barrier panel▲ Windbreak screen▲ Ventilation duct for train depot(Front side)(Enlarged view)(Back side)▲ Sound barrier▲ Sound barrier member(Enlarged view)▲ Drain reinforcement pipe

（拡大）▲ Handrail in tunnel▲ Cable bracket

9

Typicalapplications(Enlarged view)▲ Snow fence▲ Guardrail▲ Bridge railing▲ Steel pipe pile

▲ Fireproof protection for optical fiber

Change in appearance of actual constructions
Snow fence (Hokkaido)

Guardrail▲ Cable duct①②

① Inspection catwalk② Middle step②

No red rust was observed on its surface orend face even after the lapse of 10 years sinceconstruction.

No red rust was observed on its surface evenafter the lapse of 5 years since construction.

③③ Inspection catwalk▲ The Second Tomei Expressway [Yahagigawa Bridge (Toyoda arrows bridge)]45▲ Inner panel of platform door46

9 Typical applications

TM

Electric power and electric equipment▲ Cable rack
▲ Solar battery module frame▲ Power control board▲ Air conditioning unit

▲ Cable rack

▲ Solar battery module frame▲ Solar battery module frame▲ Switchboard▲ Cable rack9

Typicalapplications▲ Parking palette

Others▲ Multistory mechanical parking garage47▲ Bicycle racks▲ Self-propelled multistory parking garage (distant view)▲ Deck plate for parking lot (enlarged view)▲ Fire-hydrant cabinet48

9 Typical applications

TM

Housing
Electrical machinery/construction▲ Trestle for outdoor unit of
air conditioner (unpainted)▲ Antenna mounting bracket▲ Fuel tank for oil fan heater▲ Grounding rod▲ Trestle for outdoor unit of
air conditioner (pained)▲ EV charger

9

Typicalapplications▲ Bottom plate for outdoor unit of air conditioner▲ Mounting strap▲ Structural material for residential house49▲ Joint metal▲ Structural material for housing (crossbeam)▲ Structural material for housing (crossbeam)▲ Mounting strap▲ Window anchor▲ Door supporter50

9 Typical applications

TM

Automobile parts■ Filter case

■ Wiper linkage■ Battery module cover for HEV(Frame + cover)■ Radiator fan motor cover■ Constant velocity joint cover■ Tank heat protector■ Starter motor yoke

9

Typicalapplications■ Latch■ Splash guard■ Horn■ Pulley■ Window regulator motor yoke

■ Hood lock■ Lower sash

▲ Engine room parts

51▲ Car body parts▲ Door inner parts52

10 Affiliate companies' products
RPE rock bolt

TM

Nippon Steel Coated Steel Pipe Co., Ltd.

Tunnel wall surface

GroundMechanism of RPE rock bolt

After expansion■

Main body

Coating weightsymbolAdvantages
High corrosion resistance,high concrete resistanceChemical conversion
treatment

90

Untreated

Since this product leaves practically no waste materials,
unlike plywood forms,it promises to decrease environmental destruction like deforestation and significantly
lessen the amount of carbon dioxide generated at thetime of waste material incineration. Naturally, it is also
expected that the decrease in the number of necessary
vehicles and heavy machines will have the effect of reducing carbon dioxide emissions.

Thickness (mm)54.0 mm in dia.
X 2.0 (expanded)
54.0 mm in dia.
X 2.3 (expanded)

Field
Building material■

Standing seam folded-plate roof HK-500 (ZAM™ is used for its parts) NST Nihonteppan Co., Ltd.
Features

Application

Advantages

Coating weightsymbolChemical treatment

Thickness (mm)Main body of Sepamate

High corrosion resistance,high concrete resistance60

ZC treatment

0.4

For information on the product, contact: Nippon Steel Coated Sheet Corporation Building Material Sales Dept. (Tel: (81-3)-6880-2820 http://www.niscs.nipponsteel.com

Slide type bicycle rack
This newly-designed slide type cycle rack is
about 20% lighter in weight
than conventional models.

❶ Excellent performance
・As fitting positions are provided on both sides of the main body, the productexhibits superior resistance to wind load.
・A layer of air formed after seam finish prevents capillary action, increasingwater-tightness.
・A fitting rib is provided to improve bending rigidity.

Tsuzuki Corporation, Higashi Tokyo Office (Koto-ku, Tokyo)
Designed by: City Architectural Planning Laboratory
Installed by: Kanetomo Co., Ltd.
Photographed by: Nobuaki Nakagawa

Double tight frame F type・ Enhanced durability is assured through the adoption of ZAM™ brandproduct, a high corrosion resistant coated steel sheet.

■53

Nippon Steel Nisshin Business Service Co., Ltd.

Fea- ❶ 1.5 times higher in capacity than conventional racks
tures ・With
20 bicycles stowed, model H-2 has a width of 5,600 mm while front wheel
model Z-1 has a width of 8,600 mm.

❸ Distinguished durability and environmental
friendliness provided by ZAM™

❷ High installation efficiency

・Employing ZAM™, Nippon Steel's high corrosion resistant hot-dip coated steel
sheet, this product requires no painting, contributing to resource saving.

・Without any need for a suspender, this product can be easily mounted to a tightframe.
・Because of the plate shape characteristic of the HK Series, it is easy to provide
a seam finish.
The seam finishing machine is as light in weight as 19 kg.

・Even the upper rack of model H-2 has a height of 800 mm.
・The capacity is nearly the same as that of double-deck type.

❹ Wide field of view to ensure security❺ The parking lot for bicycles can be flexibly designed
without any concern for the height of the ceiling height.

・Even in the presence of beams or ducts, this product can be installed without
problems, thereby increasing the freedom of bicycle-parking area design.

Application
Double tight frame F type

Building
material Universal clamp
Seam fitting spacer

Advantages
High corrosion
resistance,high processability

Thickness
Coating(mm)
weight symbol Chemical treatment
Equipment

2.8
90

A treatment

2.8

Application

Coating weight Chemical conversion
symboltreatment

Manufacturing
process

Qualitycharacteristics

4

Chromium-freetreatment

1.6
φ12.7×1.2

SliderHigh corrosion resistance,high processability,
process simplification

90

ZC treatment

5Standards

6

Examplesofprocessed
products

7

Acquiredcertifications
Certificates8

MasstablesTypicalapplications

10

Affiliate
companies'
products

11

Precautions

Thickness (mm)Tire guide

Base■

Advantages

Main body

Rail

1.6

For information on the product, contact: Exterior Building Material Sales Division of NST Nihonteppan Co., Ltd. (Tel: 03-3272-5120, http://www.np-nippan.co.jp)

29❷ Easy to take bicycles in and out
・The rack itself can be freely moved laterally for easy storage of bicycles.

Field
Field

What isZAM™?

❸ Reduced environmental load

The compact and lightweight high pressure generator and the seal head lighten the work load.

(Maximum diameter: 54.0 mm)

1

3

Since no form removal is necessar y, the worker canproceed to backfilling only by removing reinforcing materials after concrete placement, making it possible to shorten the work period. With only horizontal reinforcing materials required, this product involves only a small amount ofmaterials to be carried out, leaving practically no wastematerials. Nearly free of incineration cost, it also cuts
down cost.

❸ Reduced environmental load

For information on the product, contact: Sales Division of Nippon Steel Coated Steel Pipe Co., Ltd. (Tel: (81-3)-5117-4218 http://www.nscsp.nipponsteel.com)

High corrosion resistance coatedsteel sheet ZAM™ tight frame❷ Process simplification,
cost reduction

Multiple (2 to 5) rock bolts can be installed at one
time.

Application

Rock bolt main body (18-ton proof strength)

FeaturesThis product is light in weight and easy to handle, contributing to the enhancement of work ef ficiency and theimprovement of the work environment. Because theproduct is made of a light-gauge steel sheet of 0.4 mm, it
can be stored in a narrow space to secure a wider work
space. These features work to decrease the number ofpackages, lessen the amount of materials to be carried inand out, a reduce the number of trucks, and shor ten
operation time of heavy machines.

❷ High installation efficiency

The ground is pressured byhydraulically expanding the steel pipe,
thereby brining about a clamping effect.

Rock bolt main body (12-ton proof strength)❶ Lightweight, space-saving

This product uses Z AM™, which is a prestressforce-retaining elastic body and at the same time ahigh corrosion resistant steel sheet involving only aminium of thickness reduction. It contribute greatly
to the enhancement of long-term corrosion resistance of a tunnel.

(Diameter: 36.0 mm)

Civil engineering

Features❶ High corrosion resistant material

Hydraulicpressure

Field

Nippon Steel Coated Sheet Corporation

A rock bolt is a type of anchor bolt used forpreventing collapse of the inner wall of an
excavated tunnel. Rock bolts currently available
use cement mor tar as a fixing material andtherefore require several hours for stabilizing.
With this RPE rock bolt, a ground clamping effectcan be obtained in as short as 30 seconds by
hydraulically expanding the irregular shaped steel
pipe. In addition, it has overcome the problem of
low corrosion resistance, which has been aweakness of conventional products with expanded
steel pipes.

RPE rock bolt

Before expansion

Steel framework “Sepamate”

2.3
3.2
3.2

For information on the product, contact: Bicycle Parking Space Division of Nippon Steel Nisshin Business Service Co., Ltd. (Tel: 03-3553-8516, http://www.bs.nisshin.nipponsteel.com)

54

11 Precautions
Precautions for use

Phenomenon of darkening of hot-dip zinc-based coating● Use underwater or in flowing waterIn applications underwater or with frequent exposure to flowing water, the stable protective film layer that is characteristic of ZAM™
is difficult to form, so that sometimes ZAM™ may gather red rust early without showing superiority to hot-dip zinc-coated steel
sheets. Be aware of this when using it in such applications.

● Overview
・It is known that with the passage of time, hot-dip zinc-coated steel sheets are subject to what is called darkening, namely,
decrease in surface glossiness. ZAM™ may also suffer discoloration as with other hot-dip zinc-based alloy coated steel sheets.

● Handling・In order not to damage the coating surface, handle the product carefully and do not put any sweat or finger smudges on thesurface.
・If the surface should become damaged, repair it.
・Be careful when removing a coil band because the end of the coil could spring up as it unwinds.
・Store products securely, so that coils do not tip over and stacked-up cut sheets do not topple.
・Be careful to prevent water stains and dew condensation.
If packaging paper is damaged, repair it.
● Processing
・If the surface is damaged during processing, it could adversely affect corrosion resistance and paintability.
In particular, some types of lubricating oil may corrode the coating layer during press working. It is therefore necessary to checkthe type of lubricating oil to be used. When lubricant is used, perform degreasing or other post-treatment after the processing.
・As time passes, a steel sheet tends to harden, resulting in a decrease in workability. To avoid this, use the steel sheet as soon as
possible.
● Precautions to prevent galvanic corrosion(1) Avoid direct contact with lead or copper (or copper ion drops)(2) For metal fittings and attachments, use products made of stainless steel (SUS304) or aluminum or those which are painted orheavily coated with zinc for increased durability.
(3) When using ZAM™ in a salt-damaged or snow-covered area, use metal fittings and attachments made of a similar metal(aluminum, zinc-coated metal) or stainless steel insulated properly and treated with an anticorrosive (or a sealing material)(4) In such applications as lightning conductors where corrosion is likely to occur, insulation tape or aluminum wire should be used.
(Source: Preventive measures of bimetallic corrosion of prepainted/zinc-based coated steel sheets: Hot-dip zinc-coatedCommittee, The Japan Iron & Steel Federation)● Precautions to prevent corrosion due to contact with a preservative-treated or termite resistant wood
ZAM™ should not be left in contact with wood containing preservative/ant repellant for an extended period of time.
Wood and laminated wood treated with preservatives and ant-repellants (primarily copper-based agents) adversely affectcorrosion resistance property of coated steel sheets and prepainted steel sheets. Therefore, where these steel sheets are likely tocome in contact with wood materials (parts of the roofs including eaves, roof edges and joints for example), insulation underthatch(roofing stock or butyl tape) should be used for rust prevention and steel-wood direct contact should be avoided.
(Source: Preventive measures of bimetallic corrosion of prepainted/zinc-based coated steel sheets: Hot-dip zinc-coatedCommittee, The Japan Iron & Steel Federation.)● Welding・When conducting resistance welding, proper care should be taken of the electrodes to remove zinc pickups.
・For coated steel sheets containing ZAM™, coatings evaporate due to heat from welding, so that greater amounts of sputtering andfume are generated than in the case of hot- or cold-rolled steel sheets. Take appropriate safety measures at the time of welding
work.
<Safety measures for welding hot-dip zinc-coated steel sheets>
When welding hot-dip zinc-coated steel sheets, in addition to such common welding hazards as electrification, damage to theeyes caused by arc ray, burn caused by contact with hot objects and fire, be careful of;
1. increase in volume of fume generated by evaporating zinc, and2. burns or fires due to larger volumes of spatters generated.
Especially, since fume is inevitable when welding hot-dip zinc-coated steel sheets, proper measures should be put in place.

55

TM● What is darkening?
・Darkening is a phenomenon in which the steel sheet appears gray due to the presence of a very thin oxide film on the zinc surface
layer. In hot-dip hot-dip zinc-coated steel sheets, a very thin oxide film whose principal component is ZnO is formed on the zinccoating surface layer even immediately after manufacturing, and it has the property of changing and growing as time passes.
From our experience to date, we infer that this phenomenon of darkening occurs by the following mechanism.
① An oxide film grows↓② The structure and thickness of the oxide film change↓③ The changed state of ② causes a change in the optical absorption coefficient↓④ The surface takes on a gray appearance● Characteristics of darkening
・In hot-dip zinc-based alloy coated steel sheet the zinc surface layer is covered with a very thin oxide film (mainly composed of
ZnO). But the rate at which the oxide film changes and grows varies depending on such conditions as the structure andcomposition of the material as well as environmental factors, and the time until darkening becomes noticeable varies.
This darkening is unavoidable, but it is known to occur more readily under conditions of high temperature and high humidity.
Darkening is just an oxidation phenomenon on the zinc coating layer, thus the product quality is normal except for its grayappearance.
・This phenomenon develops when this material is stored either in the form of coil or cut sheet. It is therefore recommended to use
the product as early as possible.

1

What isZAM™?

2Manufacturing
process3

Qualitycharacteristics

4

Chromium-freetreatment

5Standards

6

Examplesofprocessed
products

7

Acquiredcertifications
Certificates8

Masstables9

Typicalapplications

10

Affiliate
companies'
products

11

Precautions56

11 Precautions

TM

Guide to ordering● Material, coating weight, chemical conversion treatment, oiling・Select steel grade, coating weight, and chemical treatment to fit your application. Apart from the type of chemical treatment, you
can choose either antirust oiling or no oiling. Oiling is recommended to minimize lubrication during press processing, soiling, andscratching. Oiling is necessary when no treatment is made.
● Size・Design according to the production range described in this catalog. Contact us beforehand if your conditions for use require more
stringent specifications.
Please consult us for sizes outside the range.
● Product Shapes
・Choose either mill edge or slit edge according to your application.
Also, choose either coils or cut sheets according to your cutting and processing conditions.
From the standpoint of promoting continuous, automated operations and optimizing yield, it is recommended to use coils.
When using coils, be aware that sometimes defective parts may be mixed in(because such parts cannot be removed by the inspection).
● Inside diameter and outside diameter・In the case of coils, specify the inside diameter and outside diameter to fit the specifications of your equipment. In specifying theinside diameter, allow for possible buckling in inner laps of the coil depending on the sheet thickness.
● Packing mass・Specify the packing mass according to handling capacity, etc. For coils, specify the maximum mass (if necessary, the minimum unitmass). The greater the mass, the easier the operation will be.
● Applications and processing methods
・Quality control better suited to your application and processing method can be applied if relevant information is timely provided.

1

What isZAM™?

2Manufacturing
process3

Qualitycharacteristics

4

Chromium-freetreatment

5Standards

6

Examplesofprocessed
products

7

Acquiredcertifications
Certificates8

Masstables9

Typicalapplications

10

Affiliate
companies'
products

11

Precautions

57

58