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EN 10277-3 35S20 Cold-Drawn, Quenched & Tempered Steel – High Strength, Superior Ductility

The free cutting case hardening steel 35S20 is used for bulk parts of mean strength, especially if ductility demands in transversal direction are as high as for usual C-steels (e.g. C35). Cutting speed is increased but higher cracking risk according to rising C-content has to be considered. Application in car industry, apparatus, equipment and machine engineering (e.g. screws, nuts, small-size parts). As a bright steel product it is used in the form of bars, bright, straight, in various conditions (see DIN EN 10277 : 1999-10).

Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.8 - 7.85 g/cm³

Mechanical

PropertyTemperatureValue

Elastic modulus

-100.0 °C

217 GPa

20.0 °C

210 - 212 GPa

100.0 °C

207 GPa

200.0 °C

193 - 199 GPa

300.0 °C

185 - 192 GPa

400.0 °C

175 - 184 GPa

500.0 °C

175 GPa

600.0 °C

164 GPa

Elongation

20.0 °C

16 - 17 %

Poisson's ratio

20.0 °C

0.28 [-]

Shear modulus

20.0 °C

81 GPa

Tensile strength

20.0 °C

550 - 750 MPa

Yield strength Rp0.2

20.0 °C

320 - 380 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

1.1E-5 - 1.25E-5 1/K

200.0 °C

1.18E-5 - 1.3E-5 1/K

300.0 °C

1.36E-5 1/K

400.0 °C

1.32E-5 - 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

420 - 461 J/(kg·K)

100.0 °C

479 - 490 J/(kg·K)

200.0 °C

499 - 530 J/(kg·K)

300.0 °C

517 J/(kg·K)

400.0 °C

536 - 610 J/(kg·K)

500.0 °C

558 J/(kg·K)

600.0 °C

587 J/(kg·K)

Thermal conductivity

20.0 °C

44.9 - 49 W/(m·K)

100.0 °C

46.2 W/(m·K)

200.0 °C

45.5 W/(m·K)

300.0 °C

43.1 W/(m·K)

400.0 °C

40.4 W/(m·K)

500.0 °C

37.7 W/(m·K)

600.0 °C

34.9 W/(m·K)

Thermal diffusivity

20.0 °C

12.5 mm²/s

100.0 °C

12 mm²/s

200.0 °C

11 mm²/s

300.0 °C

9.8 mm²/s

400.0 °C

8.6 mm²/s

500.0 °C

7.3 mm²/s

600.0 °C

5.9 mm²/s

Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

1.2E-7 - 2.32E-7 Ω·m

100.0 °C

2.77E-7 Ω·m

200.0 °C

3.47E-7 Ω·m

300.0 °C

4.35E-7 Ω·m

400.0 °C

5.38E-7 Ω·m

500.0 °C

6.56E-7 Ω·m

600.0 °C

7.95E-7 Ω·m

Chemical properties

PropertyValue

Carbon

0.32 - 0.39 %

Manganese

0.7 - 1.1 %

Phosphorus

0.06 %

Silicon

0.4 %

Sulfur

0.15 - 0.25 %


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    4. EN 10277‑3 Grade 35SPb20 – Cold‑Drawn, Quenched & Tempered Steel for High‑Strength Applications
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    8. EN 10277-3 Grade 35S20 – High-Strength, Ductile Quenched & Tempered Steel for Automotive & Machinery
    9. EN 10277-3 Grade 46S20: Premium Cold-Drawn, Quenched & Tempered Steel (C+QT)
    10. DIN 1651 Grade 35S20 Steel – Cold Drawn, Quenched & Tempered (C+QT)