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DIN 17176 12CrMo19‑5 Quenched & Tempered (QT1) – High‑Temperature Steel for Hydrogenation Vessels

High temperature steel for high pressure hydrogenation vessels. It is scale resistant up to 650 °C as well as chemical resistant to aggressive (e.g. sulphurous) oils. Application: hydration facilities and petroleum distillation facilities for tubes and shapes, in the quenched and tempered condition also in the steam boiler construction for overheater tubes and collectors

Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.77 g/cm³

Mechanical

PropertyTemperatureValue

Elastic modulus

20.0 °C

212 - 212.36 GPa

95.0 °C

208.22 GPa

100.0 °C

207 - 212 GPa

150.0 °C

204.77 GPa

200.0 °C

199 - 205 GPa

205.0 °C

200.64 GPa

260.0 °C

195.81 GPa

300.0 °C

192 - 198 GPa

315.0 °C

191.67 GPa

370.0 °C

187.54 GPa

400.0 °C

184 - 189 GPa

425.0 °C

182.71 GPa

485.0 °C

177.89 GPa

500.0 °C

175 - 180 GPa

540.0 °C

172.37 GPa

595.0 °C

166.85 GPa

600.0 °C

164 - 168 GPa

650.0 °C

159.96 GPa

705.0 °C

151.69 GPa

760.0 °C

139.27 GPa

Elongation

20.0 °C

17 - 20 %

Elongation, transverse

20.0 °C

17 %

Hardness, Brinell

20.0 °C

175 - 220 [-]

Poisson's ratio

20.0 °C

0.31 [-]

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

0.32 [-]

540.0 °C

0.3 [-]

595.0 °C

0.31 [-]

650.0 °C

0.32 [-]

705.0 °C

0.33 [-]

760.0 °C

0.33 [-]

Shear modulus

20.0 °C

81.36 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

72.05 GPa

425.0 °C

70.33 GPa

485.0 °C

67.57 GPa

540.0 °C

66.19 GPa

595.0 °C

63.78 GPa

650.0 °C

60.67 GPa

705.0 °C

57.23 GPa

760.0 °C

52.4 GPa

Tensile strength

20.0 °C

470 - 640 MPa

100.0 °C

450 MPa

150.0 °C

425 MPa

200.0 °C

400 MPa

250.0 °C

390 - 400 MPa

300.0 °C

380 - 390 MPa

350.0 °C

365 - 380 MPa

400.0 °C

345 - 360 MPa

450.0 °C

325 - 335 MPa

500.0 °C

305 - 310 MPa

Tensile strength, transverse

20.0 °C

470 - 640 MPa

Yield strength

20.0 °C

275 MPa

Yield strength Rp0.2

20.0 °C

275 MPa

100.0 °C

245 MPa

150.0 °C

237 MPa

200.0 °C

230 MPa

250.0 °C

223 MPa

300.0 °C

216 MPa

350.0 °C

206 MPa

400.0 °C

196 MPa

450.0 °C

181 MPa

500.0 °C

167 MPa

Yield strength Rp0.2, transverse

20.0 °C

275 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

1.13E-5 - 1.14E-5 1/K

200.0 °C

1.18E-5 - 1.2E-5 1/K

300.0 °C

1.23E-5 - 1.24E-5 1/K

400.0 °C

1.27E-5 - 1.28E-5 1/K

425.0 °C

1.24E-5 1/K

485.0 °C

1.26E-5 1/K

500.0 °C

1.3E-5 - 1.32E-5 1/K

540.0 °C

1.28E-5 1/K

595.0 °C

1.29E-5 1/K

600.0 °C

1.32E-5 - 1.34E-5 1/K

650.0 °C

1.32E-5 1/K

700.0 °C

1.33E-5 1/K

705.0 °C

1.32E-5 1/K

Max service temperature, long

0 - 650 °C

Melting point

1382 - 1529 °C

Typical for Chromium Molybdenum Steel

Specific heat capacity

-100.0 °C

423 J/(kg·K)

20.0 °C

461 J/(kg·K)

100.0 °C

479 - 490 J/(kg·K)

200.0 °C

499 - 530 J/(kg·K)

300.0 °C

517 - 560 J/(kg·K)

400.0 °C

536 - 610 J/(kg·K)

500.0 °C

558 - 670 J/(kg·K)

600.0 °C

587 - 760 J/(kg·K)

Thermal conductivity

20.0 °C

20.3 W/(m·K)

100.0 °C

22.7 - 23 W/(m·K)

200.0 °C

25 W/(m·K)

300.0 °C

26 - 26.4 W/(m·K)

400.0 °C

27 - 27.3 W/(m·K)

500.0 °C

27.7 - 28 W/(m·K)

600.0 °C

27.8 - 28 W/(m·K)

700.0 °C

27.5 W/(m·K)

Thermal diffusivity

20.0 °C

5.7 mm²/s

100.0 °C

5.9 mm²/s

200.0 °C

6.1 mm²/s

300.0 °C

6 mm²/s

400.0 °C

5.8 mm²/s

500.0 °C

5.4 mm²/s

600.0 °C

4.7 mm²/s

Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

5.14E-7 Ω·m

100.0 °C

5.6E-7 - 5.63E-7 Ω·m

200.0 °C

6.3E-7 - 6.32E-7 Ω·m

300.0 °C

7.1E-7 - 7.12E-7 Ω·m

400.0 °C

7.97E-7 - 8E-7 Ω·m

500.0 °C

8.9E-7 - 8.93E-7 Ω·m

600.0 °C

9.96E-7 - 1E-6 Ω·m

700.0 °C

1.12E-6 Ω·m

Chemical properties

PropertyValue

Carbon

0.08 - 0.15 %

Chromium

4 - 6 %

Manganese

0.3 - 60 %

Molybdenum

0.45 - 0.65 %

Phosphorus

0.03 - 0.04 %

Silicon

0.3 - 0.5 %

Sulfur

0.03 - 0.035 %


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