LEX Technical Note

High Carbon-type LEX
Mean coefficient of thermal expansion [x 10-6/°C]

Applicable lower limit temperature [°C]8.007.0

LEX 5

LEX 15

LEX 25

LEX 35

LEX 45

LEX 55

LEX 40K

LEX 35

LEX 45

LEX 55

LEX 40K-50

6.0-100

5.0
4.0-150

3.0-200

2.0-250

1.00.0

LEX 5

LEX 15

LEX 25

LEX 35

LEX 45

LEX 55

LEX 40K-300

0.2% yield strength [MPa]Tensile strength [MPa]

350

500

300

400

250300200
150200100100500

LEX 5

LEX 15

LEX 25

LEX 35

LEX 45

LEX 55

LEX 40K0LEX 5

LEX 15

LEX 25Attributes, photos, diagrams and evaluations, etc., listed in this catalog are representative items drawn from Nippon Chuzo data, they do not guarantee the quality of the product. Also note that the content of this catalog is subject to change without notice.

1

High Carbon-type LEXElongation [%]Hardness HB20150

15100
1050
50

LEX 5

LEX 15

LEX 25

LEX 35

LEX 45

LEX 55

LEX 40K0

LEX 5

LEX 15Young’s modulus (bending resonance method) [GPa]Poisson’s ratio

1500.35

LEX 25

LEX 35

LEX 45LEX 55

LEX 40K

LEX 25

LEX 35

LEX 45

LEX 55

LEX 40K

0.30
0.25

1000.200.15
500.100.05

0

LEX 5

LEX 15

LEX 25

LEX 35

LEX 45

LEX 55

LEX 40K0

LEX 5

LEX 15Attributes, photos, diagrams and evaluations, etc., listed in this catalog are representative items drawn from Nippon Chuzo data, they do not guarantee the quality of the product. Also note that the content of this catalog is subject to change without notice.

2

High Carbon-type LEX
Specific heat [J/kg°C]

Thermal conductivity [W/m°C]

600

20500
154003001020051000

LEX 5

LEX 15

LEX 25

LEX 35

LEX 45

LEX 55

LEX 40K0

LEX 5

LEX 15

LEX 25

LEX 35

LEX 45

LEX 55

LEX 40K

Attributes, photos, diagrams and evaluations, etc., listed in this catalog are representative items drawn from Nippon Chuzo data, they do not guarantee the quality of the product. Also note that the content of this catalog is subject to change without notice.

3Low Carbon-type LEX
Mean coefficient of thermal expansion [x 10-6/°C]

Applicable lower limit temperature [°C]4.50LEX-ZERO

LEX-SF1LEX-IF1

LEX-IF2

LEX-15K

LEX-18E

LEX-35E+LEX-IF2

LEX-15K

LEX-18E

LEX-35E+4.0
3.5-503.02.5-100

2.0
1.5-150

1.00.5-200

0-0.5

LEX-ZEROLEX-SF1

LEX-IF1

LEX-IF2

LEX-15K

LEX-18E

LEX-35E+-250

0.2% yield strength [MPa]Tensile strength [MPa]

400

600

350

500

300
400

250
200

300

150

200

100
100

500

LEX-ZEROLEX-SF1

LEX-IF1

LEX-IF2

LEX-15K

LEX-18E

LEX-35E+0LEX-ZERO

LEX-SF1

LEX-IF1

Attributes, photos, diagrams and evaluations, etc., listed in this catalog are representative items drawn from Nippon Chuzo data, they do not guarantee the quality of the product. Also note that the content of this catalog is subject to change without notice.

4Low Carbon-type LEXElongation [%]Hardness HB
150

4035
30

100

25201550

1050

LEX-ZEROLEX-SF1

LEX-IF1

LEX-IF2

LEX-15K

LEX-18E

LEX-35E+

Young’s modulus (bending resonance method) [GPa]0LEX-ZEROLEX-SF1

LEX-IF1

LEX-IF2

LEX-15K

LEX-18E

LEX-35E+

LEX-IF1

LEX-IF2

LEX-15K

LEX-18E

LEX-35E+

Poisson’s ratio0.350.30

1500.250.20

1000.150.10

500.050LEX-ZEROLEX-SF1

LEX-IF1

LEX-IF2

LEX-15K

LEX-18E

LEX-35E+

0LEX-ZEROLEX-SF1

Attributes, photos, diagrams and evaluations, etc., listed in this catalog are representative items drawn from Nippon Chuzo data, they do not guarantee the quality of the product. Also note that the content of this catalog is subject to change without notice.

5

Low Carbon-type LEX
Specific heat [J/kg°C]

Thermal conductivity [W/m°C]

600

15500
400

10300
200

51000LEX-ZERO

LEX-SF1

LEX-IF1

LEX-IF2

LEX-15K

LEX-18E

LEX-35E+

0LEX-ZEROLEX-SF1

LEX-IF1

LEX-IF2

LEX-15K

LEX-18E

LEX-35E+

Attributes, photos, diagrams and evaluations, etc., listed in this catalog are representative items drawn from Nippon Chuzo data, they do not guarantee the quality of the product. Also note that the content of this catalog is subject to change without notice.

6LEX-ZERO®
Mean coefficient of thermal expansion [x 10-6/°C]
0.20

Applicable lower limit temperature [°C]
03D printer material

Casting material

Forging material

Casting materialForging material

0.15-50

0.100.05-1000-150-0.05-0.10-200(Stable at -196 C)-0.15-0.20

3D printer materiali

Casting material

Forging material-2500.2% yield strength [MPa]Tensile strength [MPa]

350

500

300

400

250
300

200
1502001001005003D printer material

Casting material

Forging material

03D printer material

Attributes, photos, diagrams and evaluations, etc., listed in this catalog are representative items drawn from Nippon Chuzo data, they do not guarantee the quality of the product. Also note that the content of this catalog is subject to change without notice.

7LEX-ZERO®
Elongation [%]Hardness HB451504035301002520155010503D printer material

Casting material

Forging material

03D printer material

Young’s modulus (bending resonance method) [GPa]Poisson’s ratio

1500.35

Casting material

Forging material

Casting material

Forging material

0.300.25

1000.200.15
500.100.0503D printer material

Casting material

Forging material

03D printer material

Attributes, photos, diagrams and evaluations, etc., listed in this catalog are representative items drawn from Nippon Chuzo data, they do not guarantee the quality of the product. Also note that the content of this catalog is subject to change without notice.

8LEX-ZERO®
Specific heat [J/kg°C]

Thermal conductivity [W/m°C]

600

15500
400

10300200

510003D printer material

Casting material

Forging material

03D printer material

Casting material

Forging material

Attributes, photos, diagrams and evaluations, etc., listed in this catalog are representative items drawn from Nippon Chuzo data, they do not guarantee the quality of the product. Also note that the content of this catalog is subject to change without notice.

9LEX-ZERO®
LEX-ZERO® Cutting Resistances for Manufactured Goods (End Mills)

LEX-ZERO® Tool Attrition Rates for Manufactured Goods (End Mills)
45Casting
鋳造品

Tool attrition rate (μm)

Cutting resistance (N)450

Forging
鍛造品

400

3D forming
3D造形品
350Casting
鋳造品

300

鍛造品
Forging
250

3Dforming
3D造形品
200050100

150200

3D forming macro structure

35

3D forming

30CastingForging252015Casting

10Forging

50250

Cutting speed (m/min)
10mm diameter 4-blade end mill with 30mm protrusion
Tool: VQMHVD1000Depth of cut: 5mm in axial direction (ap)
1mm in radial direction (ae)Feed rate: 0.05mm/tooth
Wet process

403D forming
051015202530354045

Processing distance (m)10mm diameter 4-blade end mill with 30mm protrusion
Tool: VQMHVD1000
Cutting speed: 100m/min
Depth of cut: 5mm in axial direction (ap)
1mm in radial direction (ae)Feed rate: 0.05mm/tooth
Wet process

Casting macro structure

Forging macro structure

Attributes, photos, diagrams and evaluations, etc., listed in this catalog are representative items drawn from Nippon Chuzo data, they do not guarantee the quality of the product. Also note that the content of this catalog is subject to change without notice.

107.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0

050

100

150200

250

300

350

400

450500Temperature ( C)LEX-ZERO

Materials usedby customers

LEX25

LEX40K

Coeﬃcient ofthermal expansion(x 10-6/ C)

Nippon Chuzoʼssuitable materials

Aptitude areas
Engineering ceramics

Silicon nitride

3.2

LEX 25

Silicon carbide

4.1

ーLiO2-AI2O3-SiO2≒0LEX-ZERO

Quartz glass

0.5LEX-SF1Graphite

5.0

LEX 55

CFRP

Aluminum

7.0

LEX 75

Semiconductors, precision instruments

Cordierite≒0LEX-ZERO

Automobile exhaust puriﬁers

Invar

1〜2

LEX-IF1、LEX 15

Super invar

1LEX-SF1

Super invar cast iron

3〜4

LEX-35E+

Cutting resistances of principle materials (N)Mean coeﬃcient of thermal expansion (x 10-6/ C)

Temperature Dependability, Machinability andMaterial Comparison for Coefficient of Thermal Expansion
1,800

Tool: Super Hard P20
Depth of cut: 2mm

1,600

Feed rate: 0.2mm/rev.
1,400

1,200

1,000

800

600050100150200

250

Cutting speed (m/min)
LEX-SF1

Super invar

LEX15

Semiconductors,
precision instruments

Semiconductors,
precision instruments

Attributes, photos, diagrams and evaluations, etc., listed in this catalog are representative items drawn from Nippon Chuzo data, they do not guarantee the quality of the product. Also note that the content of this catalog is subject to change without notice.

11

Example of Surface Treatment
Electroless Nickel Plating

Before plating

After plating

Black electroless nickel plating
and black chrome plating also available.
*In addition to plating, thermal spraying also is possible.
*Other ﬁnishes can be prepared in accordance with customer requests.

Attributes, photos, diagrams and evaluations, etc., listed in this catalog are representative items drawn from Nippon Chuzo data, they do not guarantee the quality of the product. Also note that the content of this catalog is subject to change without notice.

12

LEX related contact details

Head Oﬃce Sales Section
2-1 Shiraishicho, Kawasaki-ku, Kawasaki City, Kanagawa 210-9567
TEL: 044-322-3756

FAX: 044-355-0870

Osaka Sales Oﬃce
3F Sankyohonmachi Building, 1-10-24 Utsubohonmachi, Nishi-ku, Osaka City, Osaka 550-0004
TEL: 06-6445-3326

FAX: 06-6445-3327

https://www.nipponchuzo.co.jp