E M35

High speed steel
CHEMICAL COMPOSITIONHEAT TREATMENTCCrMoW

CoV

0.93

4.2

5.0

6.4

4.8

1.8

STANDARDS
USA: AISI M35
Europe: HS 6-5-2-5Germany: W.Nr. 1.3243(France: (AFNOR
Z90WDKCV6.5.5.4.2))• Sweden: SS 2723
• (UK: BM35)• Japan: (JIS SKH55)••••

DELIVERY HARDNESS• Soft annealing in a protective
atmosphere at 850-900°C for 3hours, followed by slow cooling 10°C
per hour down to 700°C, then aircooling.
• Stress-relieving at 600°C to 700°C
for approximately 2 hours, slow
cooling down to 500°C.
• Hardening
ina
protective
atmosphere with pre-heating in 2
steps at 450-500°C and 850-900°Cand austenitising at a temperature
suitableforchosen
workinghardness.
• 2tempers
at560°Carerecommended with at least 1 hourholding time each time.

Soft annealed max. 270 HB
Cold drawn
max. 320 HB
Cold rolledmax. 320 HB

GUIDELINES FOR HARDENINGDESCRIPTION

66

HRC
6864

E M35 contains cobalt for increased
hot hardness. The composition of E
M35 offers a good combination oftoughness and hardness. E M35 has agood machinability.

62
1220

60

1180

58

1150

56
1100

54

APPLICATIONS••••

Reamers
Milling cutters
End mills
Cutters

52HobsBroaches
Saws
Cold work

1050

500

520540••••

Wire rod
Drawn wireRound bars
Flat bars

Square bars
StripsSheets
Discs

580

600

Hardness after hardening, quenching and tempering
2 x 1 hour

Single-edge
cutting tools
Multi-edge cutting
tools
Cold work tools

Hardening

Tempering

1220°C

560°C

1180-1220°C

550-570°C

1050-1150°C

550-570°C

Available surface conditions: drawn,
ground, rolled, hot rolled, cold rolled,peeled, turned.
The above is for information only and does not create any binding contractual obligations
PDS_ EM35_EN_V0_2010

620°C

Tempering temperature

Tool

FORM SUPPLIED

560

PROCESSINGIMPACT STRENGTH

E M35 can be worked as follows:• machining(grinding,turning,milling)• polishing• plastic forming• electrical discharge machining• welding(specialprocedureincluding preheating and filler
materialsofbase
materialcomposition).

NmHRC

45684067

Impact energy

3566

3065

2564

20Hardness

6315621061560

01020

1060

11001140

Hardening temperature

GRINDING

During grinding, local heating of thesurface, which can alter the temper,
must be avoided. Grinding wheel
manufacturers can furnish advice on
the choice of grinding wheels.

Tempering 2 x 1 hour at 560°C
Unnotched test piece 7 x 10 x 55 mm

4-POINT BEND STRENGTH
kN/mm

2Nm186SURFACE TREATMENT

The steel grade is a good substratematerial for PVD and CVD coating. Ifnitriding is requested a small zone of2-15 µm is recommended. The steelgrade can also be steam-tempered if sodesired.

Rmb

5Tot.work

4123926131060

1100

1140

1180

01220 °C

Hardening temperature
Tempering 2 x 1 hour at 560°C
Dimension of test piece ∅ 4.7 mm

PHYSICAL PROPERTIES
Temperature
20°C

400°C

600°C

8.1

8.0

8.0

230

205

184

-

11.6x10-6

11.9x10-6

Rmb = Ultimate bend strengthin kN/mm²
Reb = Bend yield strengthin kN/mm²
Tot. work = Total work in Nm

COMPARATIVE PROPERTIES
Machinability

2428

27420

510

600

Wearresistance

E M2
E M3:1EM3:2
M9V
E M35
E M42C8WKE 42
ASP 2023
ASP 2030
ASP 2052
ASP 2053
ASP 2060

MATERIAL SAFETY DATA SHEETMSDS: B
The above is for information only and does not create any binding contractual obligations
PDS_ EM35_EN_V0_2010

15

Reb

01020

PROPERTIES

Densityg/cm3
Modulusof elasticity
kN/mm²
Thermalexpansion
ratio per °C
Thermalconductivity
W/m°C
Specific heat
J/kg °C

591220 °C

1180

Toughness

Hothardness

Grindability