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EN 10217-7 Grade X1NiCrMoCu31-27-4 – Solution Annealed (+AT) Austenitic Steel for High-Performance Applications

The austenitic steel X1NiCrMoCu31-27-4 is available in the solution annealed condition. Welded circular tubes of this steel are used for compression load and for corrosive load at room temperature, low temperatures and elevated temperatures. The material is resistant to intercrystalline corrosion (up to 400 °C) also in the welded condition.

Properties

General

PropertyTemperatureValue

Density

20.0 °C

8 - 8.08 g/cm³

Mechanical

PropertyTemperatureValueComment

Elastic modulus

20.0 °C

191 - 195 GPa

100.0 °C

186 - 190 GPa

200.0 °C

179 - 182 GPa

300.0 °C

172 - 174 GPa

400.0 °C

166 GPa

500.0 °C

158 - 159 GPa

Elongation

20.0 °C

40 %

Elongation, transverse

20.0 °C

35 %

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

500 - 750 MPa

Tensile strength, transverse

20.0 °C

500 - 750 MPa

Yield strength Rp0.2

20.0 °C

215 MPa

50.0 °C

210 MPa

100.0 °C

190 MPa

150.0 °C

175 MPa

200.0 °C

160 MPa

250.0 °C

155 MPa

300.0 °C

150 MPa

350.0 °C

145 MPa

400.0 °C

135 MPa

450.0 °C

125 MPa

500.0 °C

120 MPa

550.0 °C

115 MPa

Yield strength Rp0.2, transverse

20.0 °C

215 MPa

Yield strength Rp1.0

20.0 °C

245 MPa

50.0 °C

240 MPa

100.0 °C

220 MPa

150.0 °C

205 MPa

200.0 °C

190 MPa

250.0 °C

185 MPa

300.0 °C

180 MPa

350.0 °C

175 MPa

400.0 °C

165 MPa

450.0 °C

155 MPa

500.0 °C

150 MPa

550.0 °C

146 MPa

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

100.0 °C

1.51E-5 - 1.58E-5 1/K

200.0 °C

1.55E-5 - 1.61E-5 1/K

300.0 °C

1.58E-5 - 1.65E-5 1/K

400.0 °C

1.62E-5 - 1.69E-5 1/K

500.0 °C

1.66E-5 - 1.73E-5 1/K

Melting point

1230 - 1480 °C

Typical for Austenitic Stainless Steel

Specific heat capacity

20.0 °C

450 - 452 J/(kg·K)

100.0 °C

463 J/(kg·K)

200.0 °C

474 J/(kg·K)

300.0 °C

483 J/(kg·K)

400.0 °C

491 J/(kg·K)

500.0 °C

500 J/(kg·K)

Thermal conductivity

20.0 °C

11.7 - 12 W/(m·K)

100.0 °C

13.2 W/(m·K)

200.0 °C

15 W/(m·K)

300.0 °C

16.8 W/(m·K)

400.0 °C

18.5 W/(m·K)

500.0 °C

20.2 W/(m·K)

Thermal diffusivity

20.0 °C

3.2 mm²/s

100.0 °C

3.5 mm²/s

200.0 °C

3.8 mm²/s

300.0 °C

4.1 mm²/s

400.0 °C

4.5 mm²/s

500.0 °C

4.8 mm²/s

Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

1E-6 - 1.04E-6 Ω·m

100.0 °C

1.07E-6 Ω·m

200.0 °C

1.1E-6 Ω·m

300.0 °C

1.13E-6 Ω·m

400.0 °C

1.16E-6 Ω·m

500.0 °C

1.18E-6 Ω·m

Chemical properties

PropertyValue

Carbon

0.02 %

Chromium

26 - 28 %

Copper

0.7 - 1.5 %

Manganese

2 %

Molybdenum

3 - 4 %

Nickel

30 - 32 %

Nitrogen

0.11 %

Phosphorus

0.03 %

Silicon

0.7 %

Sulfur

0.01 %


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