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EN 10272 Grade X1NiCrMoCu25-20-5: Solution-Annealed Austenitic Steel for High-Performance Pressure Vessels

The austenitic steel grade X1NiCrMoCu25-20-5 acc. to DIN EN 10272 : 2001-01is used for hot and cold formed rods for pressure vessel. The material shows high resistance to highly aggressive organic and inorganic acids, high pitting and largely stress corrosion resistance. With an interaction parameter (Pitting index) of 39 after 1.4529 is it the second best of all steels. The material is resistant to intercrystalline corrosion also in sensitized condition.

Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.76 - 8 g/cm³

Mechanical

PropertyTemperatureValueComment

Elastic modulus

-100.0 °C

206 GPa

20.0 °C

195 - 196 GPa

100.0 °C

190 GPa

200.0 °C

182 GPa

300.0 °C

174 GPa

400.0 °C

166 GPa

500.0 °C

158 GPa

600.0 °C

150 GPa

700.0 °C

142 GPa

800.0 °C

134 GPa

900.0 °C

127 GPa

1000.0 °C

120 GPa

Elongation

20.0 °C

35 %

Elongation, transverse

20.0 °C

30 %

Hardness, Brinell

20.0 °C

230 [-]

Hardness, Brinell, trans

20.0 °C

230 [-]

Poisson's ratio

23.0 °C

0.3 [-]

Typical for Austenitic Stainless Steel

Shear modulus

23.0 °C

77 GPa

Typical for Austenitic Stainless Steel

Tensile strength

20.0 °C

530 - 730 MPa

100.0 °C

500 MPa

150.0 °C

480 MPa

200.0 °C

460 MPa

250.0 °C

450 MPa

300.0 °C

440 MPa

350.0 °C

435 MPa

Tensile strength, transverse

20.0 °C

530 - 730 MPa

Yield strength Rp0.2

20.0 °C

230 MPa

100.0 °C

205 MPa

150.0 °C

190 MPa

200.0 °C

175 MPa

250.0 °C

160 MPa

300.0 °C

145 MPa

350.0 °C

135 MPa

400.0 °C

125 MPa

450.0 °C

115 MPa

500.0 °C

110 MPa

550.0 °C

105 MPa

Yield strength Rp0.2, transverse

20.0 °C

230 MPa

Yield strength Rp1.0

20.0 °C

260 MPa

100.0 °C

235 MPa

150.0 °C

220 MPa

200.0 °C

205 MPa

250.0 °C

190 MPa

300.0 °C

175 MPa

350.0 °C

165 MPa

400.0 °C

155 MPa

450.0 °C

145 MPa

500.0 °C

140 MPa

550.0 °C

135 MPa

Yield strength Rp1.0, transverse

20.0 °C

260 MPa

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

-100.0 °C

1.49E-5 1/K

20.0 °C

1.61E-5 1/K

100.0 °C

1.58E-5 - 1.67E-5 1/K

200.0 °C

1.61E-5 - 1.72E-5 1/K

300.0 °C

1.65E-5 - 1.77E-5 1/K

400.0 °C

1.69E-5 - 1.81E-5 1/K

500.0 °C

1.73E-5 - 1.84E-5 1/K

600.0 °C

1.88E-5 1/K

700.0 °C

1.91E-5 1/K

800.0 °C

1.94E-5 1/K

900.0 °C

1.97E-5 1/K

1000.0 °C

2E-5 1/K

Melting point

1230 - 1480 °C

Typical for Austenitic Stainless Steel

Specific heat capacity

-100.0 °C

440 J/(kg·K)

20.0 °C

450 - 472 J/(kg·K)

100.0 °C

487 J/(kg·K)

200.0 °C

503 J/(kg·K)

300.0 °C

512 J/(kg·K)

400.0 °C

520 J/(kg·K)

500.0 °C

530 J/(kg·K)

600.0 °C

541 J/(kg·K)

700.0 °C

551 J/(kg·K)

800.0 °C

559 J/(kg·K)

900.0 °C

565 J/(kg·K)

1000.0 °C

571 J/(kg·K)

Thermal conductivity

20.0 °C

11.9 - 12 W/(m·K)

100.0 °C

13.3 W/(m·K)

200.0 °C

15.1 W/(m·K)

300.0 °C

16.7 W/(m·K)

400.0 °C

18.3 W/(m·K)

500.0 °C

19.8 W/(m·K)

600.0 °C

21.3 W/(m·K)

700.0 °C

22.8 W/(m·K)

800.0 °C

24.3 W/(m·K)

900.0 °C

25.7 W/(m·K)

1000.0 °C

27.1 W/(m·K)

Thermal diffusivity

20.0 °C

3.3 mm²/s

100.0 °C

3.4 mm²/s

200.0 °C

3.7 mm²/s

300.0 °C

4.1 mm²/s

400.0 °C

4.3 mm²/s

500.0 °C

4.5 mm²/s

600.0 °C

4.7 mm²/s

700.0 °C

5 mm²/s

800.0 °C

5.4 mm²/s

900.0 °C

5.7 mm²/s

1000.0 °C

5.8 mm²/s

Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

9.59E-7 - 1E-6 Ω·m

100.0 °C

1.01E-6 Ω·m

200.0 °C

1.05E-6 Ω·m

300.0 °C

1.1E-6 Ω·m

400.0 °C

1.13E-6 Ω·m

500.0 °C

1.17E-6 Ω·m

600.0 °C

1.19E-6 Ω·m

700.0 °C

1.22E-6 Ω·m

800.0 °C

1.24E-6 Ω·m

900.0 °C

1.26E-6 Ω·m

1000.0 °C

1.28E-6 Ω·m

Chemical properties

PropertyValue

Carbon

0.02 %

Chromium

19 - 21 %

Copper

1.2 - 2 %

Manganese

2 %

Molybdenum

4 - 5 %

Nickel

24 - 26 %

Nitrogen

0.15 %

Phosphorus

0.03 %

Silicon

0.7 %

Sulfur

0.01 %


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