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DIN 17243 Grade 20Mn5 – High‑Strength Normalized/Normalized‑Formed Steel (+N)

High temperature quenched and tempered steel. Application: larger forgings for mechanical engineering, steam vessels, pressure vessels

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 - 200 GPa

300.0 °C

192 - 193 GPa

400.0 °C

184 GPa

500.0 °C

175 GPa

600.0 °C

164 GPa

Elongation

20.0 °C

20 - 22 %

Poisson's ratio

23.0 °C

0.29 [-]

Typical for Low Carbon Steel

Shear modulus

23.0 °C

82 GPa

Typical for Low Carbon Steel

Tensile strength

20.0 °C

490 - 610 MPa

Yield strength Rp0.2

20.0 °C

260 MPa

100.0 °C

245 MPa

150.0 °C

225 MPa

200.0 °C

210 MPa

250.0 °C

190 MPa

300.0 °C

170 MPa

350.0 °C

150 MPa

400.0 °C

130 MPa

450.0 °C

105 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

1.11E-5 - 1.25E-5 1/K

200.0 °C

1.21E-5 - 1.3E-5 1/K

300.0 °C

1.29E-5 - 1.36E-5 1/K

400.0 °C

1.35E-5 - 1.41E-5 1/K

500.0 °C

1.39E-5 - 1.45E-5 1/K

600.0 °C

1.41E-5 - 1.49E-5 1/K

Max service temperature

500 °C

Typical for Carbon Steel

Melting point

1480 - 1526 °C

Typical for Low 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

39.6 W/(m·K)

100.0 °C

41 W/(m·K)

200.0 °C

41 W/(m·K)

300.0 °C

39.9 W/(m·K)

400.0 °C

38.1 W/(m·K)

500.0 °C

35.9 W/(m·K)

600.0 °C

33.6 W/(m·K)

Thermal diffusivity

20.0 °C

11 mm²/s

100.0 °C

10.6 mm²/s

200.0 °C

9.9 mm²/s

300.0 °C

9 mm²/s

400.0 °C

8.1 mm²/s

500.0 °C

6.9 mm²/s

600.0 °C

5.7 mm²/s

Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

2.63E-7 Ω·m

100.0 °C

3.12E-7 Ω·m

200.0 °C

3.85E-7 Ω·m

300.0 °C

4.7E-7 Ω·m

400.0 °C

5.71E-7 Ω·m

500.0 °C

6.88E-7 Ω·m

600.0 °C

8.25E-7 Ω·m

Magnetic

PropertyValueComment

Curie temperature

770 °C

Typical for Low Carbon Steel

Chemical properties

PropertyValue

Aluminium

0.015 - 0.05 %

Carbon

0.17 - 0.23 %

Chromium

0.3 %

Manganese

1 - 1.5 %

Phosphorus

0.04 %

Silicon

0.6 %

Sulfur

0.03 %


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