ISO 683-4 Grade 35S20 quenched and tempered (+QT)

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Description

The free-cutting steel 35S20, suitable for quenching and tempering, is used for bulk parts of mean strength, especially for lower requirements to ductility in transversal direction opposite to comparable C-steels (e.g. C35). Increased cutting speed represents an advantage, the increased cracking risk at rising C-content has to be considered. Application in automotive engineering, as well as in apparatus equipment and machine engineering (e.g. screws, nuts, small-size parts).

Related Standards

Equivalent Materials

This material data has been provided by WIAM.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

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Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.8 - 7.85 g/cm³

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Mechanical

PropertyTemperatureValue

Elastic modulus

-100.0 °C

217 GPa

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20.0 °C

210 - 212 GPa

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100.0 °C

207 GPa

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200.0 °C

193 - 199 GPa

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300.0 °C

185 - 192 GPa

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400.0 °C

175 - 184 GPa

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500.0 °C

175 GPa

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600.0 °C

164 GPa

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Elongation

20.0 °C

15 - 17 %

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Poisson's ratio

20.0 °C

0.28 [-]

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Shear modulus

20.0 °C

81 GPa

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Tensile strength

20.0 °C

550 - 780 MPa

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Yield strength

20.0 °C

320 - 430 MPa

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Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

-100.0 °C

1.08E-5 1/K

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20.0 °C

1.19E-5 1/K

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100.0 °C

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

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200.0 °C

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

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300.0 °C

1.36E-5 1/K

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400.0 °C

1.32E-5 - 1.41E-5 1/K

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500.0 °C

1.45E-5 1/K

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600.0 °C

1.49E-5 1/K

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Max service temperature

500 °C

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Typical for Carbon Steel

Melting point

1380 - 1514 °C

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Typical for Medium Carbon Steel

Specific heat capacity

-100.0 °C

423 J/(kg·K)

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20.0 °C

420 - 461 J/(kg·K)

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100.0 °C

479 - 490 J/(kg·K)

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200.0 °C

499 - 530 J/(kg·K)

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300.0 °C

517 J/(kg·K)

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400.0 °C

536 - 610 J/(kg·K)

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500.0 °C

558 J/(kg·K)

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600.0 °C

587 J/(kg·K)

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Thermal conductivity

20.0 °C

44.9 - 49 W/(m·K)

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100.0 °C

46.2 W/(m·K)

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200.0 °C

45.5 W/(m·K)

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300.0 °C

43.1 W/(m·K)

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400.0 °C

40.4 W/(m·K)

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500.0 °C

37.7 W/(m·K)

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600.0 °C

34.9 W/(m·K)

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Thermal diffusivity

20.0 °C

12.5 mm²/s

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100.0 °C

12 mm²/s

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200.0 °C

11 mm²/s

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300.0 °C

9.8 mm²/s

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400.0 °C

8.6 mm²/s

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500.0 °C

7.3 mm²/s

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600.0 °C

5.9 mm²/s

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Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

1.2E-7 - 2.32E-7 Ω·m

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100.0 °C

2.77E-7 Ω·m

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200.0 °C

3.47E-7 Ω·m

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300.0 °C

4.35E-7 Ω·m

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400.0 °C

5.38E-7 Ω·m

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500.0 °C

6.56E-7 Ω·m

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600.0 °C

7.95E-7 Ω·m

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Chemical properties

PropertyValue

Carbon

0.32 - 0.39 %

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Manganese

0.7 - 1.1 %

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Phosphorus

0.06 %

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Silicon

0.4 %

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Sulfur

0.15 - 0.25 %

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