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EN 10216-2 X12CrMo91 Soft Annealed Steel – High-Performance Material for Hydrogenation & Petroleum Applications

High temperature steel for high pressure hydrogenation vessels. In the annealed condition it is resistant to high pressure hydrogen as well as to aggressive oils. Application: hydration facilities and petroleum distillation facilities for tubes, in the quenched and tempered condition also in the vessel and apparatus construction

Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.77 g/cm³

Mechanical

PropertyTemperatureValue

Elastic modulus

20.0 °C

211.67 - 218 GPa

95.0 °C

208.22 GPa

100.0 °C

213 - 214 GPa

150.0 °C

204.77 GPa

200.0 °C

206 - 207 GPa

205.0 °C

200.64 GPa

260.0 °C

196.5 GPa

300.0 °C

198 - 199 GPa

315.0 °C

191.67 GPa

370.0 °C

186.85 GPa

400.0 °C

190 GPa

425.0 °C

181.33 GPa

485.0 °C

175.82 GPa

500.0 °C

180 GPa

540.0 °C

170.3 GPa

595.0 °C

165.47 GPa

600.0 °C

167 - 168 GPa

650.0 °C

159.96 GPa

700.0 °C

150 GPa

760.0 °C

137.21 GPa

Elongation

20.0 °C

21 %

Elongation, transverse

20.0 °C

19 %

Hardness, Brinell

20.0 °C

179 [-]

Poisson's ratio

20.0 °C

0.3 [-]

95.0 °C

0.3 [-]

150.0 °C

0.3 [-]

205.0 °C

0.3 [-]

260.0 °C

0.3 [-]

315.0 °C

0.3 [-]

370.0 °C

0.3 [-]

425.0 °C

0.3 [-]

485.0 °C

0.31 [-]

540.0 °C

0.31 [-]

595.0 °C

0.3 [-]

650.0 °C

0.33 [-]

760.0 °C

0.33 [-]

Shear modulus

20.0 °C

81.7 GPa

95.0 °C

80.32 GPa

150.0 °C

78.95 GPa

205.0 °C

77.22 GPa

260.0 °C

75.5 GPa

315.0 °C

73.77 GPa

370.0 °C

71.71 GPa

425.0 °C

69.64 GPa

485.0 °C

67.22 GPa

540.0 °C

65.16 GPa

595.0 °C

63.43 GPa

650.0 °C

60.33 GPa

760.0 °C

51.71 GPa

Tensile strength

20.0 °C

460 - 640 MPa

100.0 °C

380 MPa

150.0 °C

360 MPa

200.0 °C

350 MPa

250.0 °C

350 MPa

300.0 °C

350 MPa

350.0 °C

350 MPa

400.0 °C

330 MPa

450.0 °C

305 MPa

500.0 °C

280 MPa

Tensile strength, transverse

20.0 °C

460 - 640 MPa

Yield strength Rp0.2

20.0 °C

210 MPa

100.0 °C

187 MPa

150.0 °C

186 MPa

200.0 °C

178 MPa

250.0 °C

177 MPa

300.0 °C

175 MPa

350.0 °C

171 MPa

400.0 °C

164 MPa

450.0 °C

153 MPa

500.0 °C

142 MPa

550.0 °C

120 MPa

Yield strength Rp0.2, transverse

20.0 °C

210 MPa

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

-100.0 °C

1E-5 1/K

20.0 °C

1.08E-5 1/K

100.0 °C

1.12E-5 - 1.13E-5 1/K

200.0 °C

1.16E-5 - 1.18E-5 1/K

300.0 °C

1.2E-5 - 1.23E-5 1/K

400.0 °C

1.23E-5 - 1.27E-5 1/K

425.0 °C

1.19E-5 1/K

485.0 °C

1.22E-5 1/K

500.0 °C

1.26E-5 - 1.3E-5 1/K

540.0 °C

1.23E-5 1/K

595.0 °C

1.25E-5 1/K

600.0 °C

1.29E-5 - 1.32E-5 1/K

650.0 °C

1.27E-5 1/K

700.0 °C

1.33E-5 1/K

Melting point

1382 - 1529 °C

Typical for Chromium Molybdenum Steel

Specific heat capacity

20.0 °C

429 J/(kg·K)

100.0 °C

464 - 500 J/(kg·K)

200.0 °C

492 - 530 J/(kg·K)

300.0 °C

511 - 560 J/(kg·K)

400.0 °C

531 - 610 J/(kg·K)

500.0 °C

554 - 680 J/(kg·K)

600.0 °C

585 - 780 J/(kg·K)

700.0 °C

626 J/(kg·K)

Thermal conductivity

20.0 °C

20.7 W/(m·K)

100.0 °C

22.6 - 23 W/(m·K)

200.0 °C

24 - 24.4 W/(m·K)

300.0 °C

25.8 - 26 W/(m·K)

400.0 °C

26.9 - 27 W/(m·K)

500.0 °C

27.8 - 28 W/(m·K)

600.0 °C

28.5 - 29 W/(m·K)

700.0 °C

28.8 W/(m·K)

Thermal diffusivity

20.0 °C

6.2 mm²/s

100.0 °C

5.9 mm²/s

200.0 °C

6 mm²/s

300.0 °C

6 mm²/s

400.0 °C

5.7 mm²/s

500.0 °C

5.4 mm²/s

600.0 °C

4.8 mm²/s

700.0 °C

4 mm²/s

Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

5.03E-7 Ω·m

100.0 °C

5.67E-7 - 5.7E-7 Ω·m

200.0 °C

6.47E-7 - 6.5E-7 Ω·m

300.0 °C

7.27E-7 - 7.3E-7 Ω·m

400.0 °C

8.09E-7 - 8.1E-7 Ω·m

500.0 °C

8.9E-7 Ω·m

600.0 °C

9.7E-7 - 9.72E-7 Ω·m

700.0 °C

1.06E-6 Ω·m

Chemical properties

PropertyValue

Carbon

0.15 %

Chromium

8 - 10 %

Manganese

0.3 - 0.6 %

Molybdenum

0.9 - 1.1 %

Phosphorus

0.03 %

Silicon

0.25 - 1 %

Sulfur

0.03 %


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