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X20CrMoV12-1 Steel (DIN 17243) – Quenched & Tempered for High‑Temperature Applications

High temperature steel for high pressure hydrogenation vessels up to 600 °C. It is scale resistant in air and steam up to 700 °C. Application: in the chemical industry, steam vessel and turbine construction for blades, screws and other high temperature parts

Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.76 g/cm³

50.0 °C

7.75 g/cm³

100.0 °C

7.74 g/cm³

150.0 °C

7.73 g/cm³

200.0 °C

7.71 g/cm³

250.0 °C

7.7 g/cm³

300.0 °C

7.68 g/cm³

350.0 °C

7.67 g/cm³

400.0 °C

7.65 g/cm³

450.0 °C

7.64 g/cm³

500.0 °C

7.62 g/cm³

550.0 °C

7.61 g/cm³

600.0 °C

7.59 g/cm³

Mechanical

PropertyTemperatureValue

Elastic modulus

20.0 °C

217.68 - 218 GPa

50.0 °C

216.02 GPa

100.0 °C

212.98 - 213 GPa

150.0 °C

209.64 GPa

200.0 °C

206 - 206.21 GPa

250.0 °C

202.38 GPa

300.0 °C

198 - 198.26 GPa

350.0 °C

193.94 GPa

400.0 °C

189 - 190 GPa

450.0 °C

184.33 GPa

500.0 °C

178.93 - 180 GPa

550.0 °C

172.85 GPa

600.0 °C

165.79 - 167 GPa

Elongation

20.0 °C

16 - 17 %

Elongation, transverse

20.0 °C

14 %

Poisson's ratio

20.0 °C

0.28 [-]

50.0 °C

0.28 [-]

100.0 °C

0.28 [-]

150.0 °C

0.28 [-]

200.0 °C

0.29 [-]

250.0 °C

0.29 [-]

300.0 °C

0.29 [-]

350.0 °C

0.29 [-]

400.0 °C

0.3 [-]

450.0 °C

0.3 [-]

500.0 °C

0.31 [-]

550.0 °C

0.31 [-]

600.0 °C

0.31 [-]

Shear modulus

20.0 °C

84.95 GPa

50.0 °C

84.27 GPa

100.0 °C

82.99 GPa

150.0 °C

81.62 GPa

200.0 °C

80.05 GPa

250.0 °C

78.48 GPa

300.0 °C

76.71 GPa

350.0 °C

74.95 GPa

400.0 °C

73.08 GPa

450.0 °C

70.93 GPa

500.0 °C

68.57 GPa

550.0 °C

66.02 GPa

600.0 °C

63.27 GPa

Tensile strength

20.0 °C

690 - 850 MPa

100.0 °C

650 MPa

150.0 °C

625 MPa

200.0 °C

600 MPa

250.0 °C

590 MPa

300.0 °C

580 MPa

350.0 °C

545 MPa

400.0 °C

510 MPa

450.0 °C

455 MPa

500.0 °C

400 MPa

550.0 °C

325 MPa

Tensile strength, transverse

20.0 °C

690 - 850 MPa

Yield strength Rp0.2

20.0 °C

490 - 500 MPa

100.0 °C

460 MPa

150.0 °C

445 MPa

200.0 °C

430 MPa

250.0 °C

415 MPa

300.0 °C

390 MPa

350.0 °C

380 MPa

400.0 °C

360 MPa

450.0 °C

330 MPa

500.0 °C

290 MPa

550.0 °C

250 MPa

600.0 °C

160 MPa

Yield strength Rp0.2, transverse

20.0 °C

490 - 500 MPa

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

20.0 °C

1.02E-5 1/K

100.0 °C

1.05E-5 - 1.08E-5 1/K

200.0 °C

1.09E-5 - 1.12E-5 1/K

300.0 °C

1.13E-5 - 1.16E-5 1/K

400.0 °C

1.16E-5 - 1.19E-5 1/K

500.0 °C

1.2E-5 - 1.21E-5 1/K

600.0 °C

1.22E-5 - 1.23E-5 1/K

Max service temperature, long

0 - 600 °C

Melting point

1370 - 1530 °C

Typical for Martensitic Stainless Steel

Specific heat capacity

20.0 °C

439 J/(kg·K)

100.0 °C

474 - 490 J/(kg·K)

200.0 °C

498 - 540 J/(kg·K)

300.0 °C

517 - 580 J/(kg·K)

400.0 °C

538 - 630 J/(kg·K)

500.0 °C

564 - 710 J/(kg·K)

600.0 °C

598 - 830 J/(kg·K)

Thermal conductivity

20.0 °C

24 W/(m·K)

100.0 °C

24 - 24.4 W/(m·K)

200.0 °C

24.8 - 25 W/(m·K)

300.0 °C

25 - 25.1 W/(m·K)

400.0 °C

25.6 - 26 W/(m·K)

500.0 °C

26 - 26.1 W/(m·K)

600.0 °C

26 - 26.4 W/(m·K)

Thermal diffusivity

20.0 °C

7.1 mm²/s

100.0 °C

6.3 mm²/s

200.0 °C

6 mm²/s

300.0 °C

5.7 mm²/s

400.0 °C

5.4 mm²/s

500.0 °C

4.9 mm²/s

600.0 °C

4.1 mm²/s

Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

6.03E-7 Ω·m

50.0 °C

6.26E-7 Ω·m

100.0 °C

6.68E-7 - 6.7E-7 Ω·m

150.0 °C

7.06E-7 Ω·m

200.0 °C

7.4E-7 - 7.43E-7 Ω·m

250.0 °C

7.83E-7 Ω·m

300.0 °C

8.17E-7 - 8.2E-7 Ω·m

350.0 °C

8.54E-7 Ω·m

400.0 °C

8.9E-7 Ω·m

450.0 °C

9.25E-7 Ω·m

500.0 °C

9.6E-7 - 9.62E-7 Ω·m

550.0 °C

9.99E-7 Ω·m

600.0 °C

1.03E-6 - 1.04E-6 Ω·m

Chemical properties

PropertyValue

Carbon

0.17 - 0.23 %

Chromium

10 - 12.5 %

Manganese

1 %

Molybdenum

0.8 - 1.2 %

Nickel

0.3 - 0.8 %

Phosphorus

0.03 %

Silicon

0.5 %

Sulfur

0.03 %

Vanadium

0.25 - 0.35 %


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