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EN 10263-4 Grade 35B2 – Annealed for Spheroidized Carbides, Optimized Cold-Forming & Strength

The cold-upsettable steel 35 B 2 can be cold-formed with a medium to high rate of forming according to the usual forming methods on single-stage and multi-stage presses. The steel 35 B 2 is one of the most frequently used steels for pressed parts, screws and tyre bolts of strength class 8.8 in the thin to medium dimension range. For 10.9 parts, the steel is usable up to an M8 dimension according to DIN 267..

Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.82 g/cm³

Mechanical

PropertyTemperatureValueComment

Elastic modulus

-100.0 °C

217 GPa

20.0 °C

212 GPa

100.0 °C

207 GPa

200.0 °C

199 GPa

300.0 °C

192 GPa

400.0 °C

184 GPa

500.0 °C

175 GPa

600.0 °C

164 GPa

Poisson's ratio

23.0 °C

0.29 [-]

Typical for Medium Carbon Steel

Reduction of area

20.0 °C

62 %

Shear modulus

23.0 °C

75 - 80 GPa

Typical for Carbon Steel

Tensile strength

20.0 °C

570 MPa

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

-100.0 °C

1.08E-5 1/K

20.0 °C

1.19E-5 1/K

100.0 °C

1.25E-5 1/K

200.0 °C

1.3E-5 1/K

300.0 °C

1.36E-5 1/K

400.0 °C

1.41E-5 1/K

500.0 °C

1.45E-5 1/K

600.0 °C

1.49E-5 1/K

Max service temperature

500 °C

Typical for Carbon Steel

Melting point

1380 - 1514 °C

Typical for Medium Carbon Steel

Specific heat capacity

-100.0 °C

423 J/(kg·K)

20.0 °C

461 J/(kg·K)

100.0 °C

479 J/(kg·K)

200.0 °C

499 J/(kg·K)

300.0 °C

517 J/(kg·K)

400.0 °C

536 J/(kg·K)

500.0 °C

558 J/(kg·K)

600.0 °C

587 J/(kg·K)

Thermal conductivity

20.0 °C

48 W/(m·K)

100.0 °C

48.9 W/(m·K)

200.0 °C

47.5 W/(m·K)

300.0 °C

44.7 W/(m·K)

400.0 °C

41.6 W/(m·K)

500.0 °C

38.6 W/(m·K)

600.0 °C

35.5 W/(m·K)

Thermal diffusivity

20.0 °C

13.3 mm²/s

100.0 °C

12.6 mm²/s

200.0 °C

11.5 mm²/s

300.0 °C

10.2 mm²/s

400.0 °C

8.9 mm²/s

500.0 °C

7.5 mm²/s

600.0 °C

6 mm²/s

Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

2.17E-7 Ω·m

100.0 °C

2.62E-7 Ω·m

200.0 °C

3.32E-7 Ω·m

300.0 °C

4.2E-7 Ω·m

400.0 °C

5.23E-7 Ω·m

500.0 °C

6.41E-7 Ω·m

600.0 °C

7.8E-7 Ω·m

Chemical properties

PropertyValue

Boron

1E-3 - 5E-3 %

Carbon

0.32 - 0.4 %

Manganese

0.5 - 0.8 %

Phosphorus

0.04 %

Silicon

0.4 %

Sulfur

0.035 %


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