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EN 10028-7 Grade X2CrNiMo18-15-4 – Solution-Annealed Steel with Superior Corrosion Resistance

The austenitic steel X2CrNiMo18-15-4 shows very high resistance to unoxidizing and halogenated media due to its high Mo-content (more than 3%), furthermore resistance to intercrystalline corrosion even in sensitized condition. It is usable for mirror-polishing and is cold formable. The steel is permitted for pressure vessel construction. Application: in chemical apparatus engineering especially in cellulose industry, in textile and rayon industry, in tankship construction and for transport containers

Properties

General

PropertyTemperatureValue

Density

20.0 °C

8 - 8.01 g/cm³

Mechanical

PropertyTemperatureValue

Elastic modulus

-100.0 °C

206 GPa

20.0 °C

196 - 200 GPa

100.0 °C

190 - 194 GPa

200.0 °C

182 - 186 GPa

300.0 °C

174 - 179 GPa

400.0 °C

166 - 172 GPa

500.0 °C

158 - 165 GPa

600.0 °C

150 GPa

700.0 °C

142 GPa

800.0 °C

134 GPa

Elongation A80, transverse

20.0 °C

35 - 40 %

Elongation, transverse

20.0 °C

35 - 40 %

Poisson's ratio

20.0 °C

0.28 [-]

Shear modulus

20.0 °C

77.3 GPa

Tensile strength

20.0 °C

520 - 720 MPa

50.0 °C

486 MPa

100.0 °C

430 MPa

150.0 °C

410 MPa

200.0 °C

390 MPa

250.0 °C

385 MPa

300.0 °C

380 MPa

350.0 °C

380 MPa

Tensile strength, transverse

20.0 °C

520 - 720 MPa

Yield strength Rp0.2

50.0 °C

202 MPa

100.0 °C

172 MPa

150.0 °C

157 MPa

200.0 °C

147 MPa

250.0 °C

137 MPa

300.0 °C

127 MPa

350.0 °C

120 MPa

400.0 °C

115 MPa

450.0 °C

112 MPa

500.0 °C

110 MPa

550.0 °C

108 MPa

Yield strength Rp0.2, transverse

20.0 °C

220 - 240 MPa

Yield strength Rp1.0

50.0 °C

240 MPa

100.0 °C

206 MPa

150.0 °C

188 MPa

200.0 °C

177 MPa

250.0 °C

167 MPa

300.0 °C

156 MPa

350.0 °C

148 MPa

400.0 °C

144 MPa

450.0 °C

140 MPa

500.0 °C

138 MPa

550.0 °C

136 MPa

Yield strength Rp1.0, transverse

20.0 °C

260 - 270 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

1.6E-5 - 1.67E-5 1/K

200.0 °C

1.65E-5 - 1.72E-5 1/K

300.0 °C

1.7E-5 - 1.77E-5 1/K

400.0 °C

1.75E-5 - 1.81E-5 1/K

500.0 °C

1.8E-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

472 - 500 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

13.5 - 14 W/(m·K)

100.0 °C

14.9 W/(m·K)

200.0 °C

16.7 W/(m·K)

300.0 °C

18.3 W/(m·K)

400.0 °C

19.8 W/(m·K)

500.0 °C

21.3 W/(m·K)

600.0 °C

22.7 W/(m·K)

700.0 °C

24.2 W/(m·K)

800.0 °C

25.6 W/(m·K)

Thermal diffusivity

20.0 °C

3.6 mm²/s

100.0 °C

3.7 mm²/s

200.0 °C

4 mm²/s

300.0 °C

4.4 mm²/s

400.0 °C

4.6 mm²/s

500.0 °C

4.7 mm²/s

600.0 °C

4.9 mm²/s

700.0 °C

5.2 mm²/s

800.0 °C

5.5 mm²/s

Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

7.75E-7 - 8.5E-7 Ω·m

100.0 °C

8.42E-7 Ω·m

200.0 °C

9.04E-7 Ω·m

300.0 °C

9.62E-7 Ω·m

400.0 °C

1.01E-6 Ω·m

500.0 °C

1.06E-6 Ω·m

600.0 °C

1.1E-6 Ω·m

700.0 °C

1.13E-6 Ω·m

800.0 °C

1.16E-6 Ω·m

Chemical properties

PropertyValue

Carbon

0.03 %

Chromium

17.5 - 19.5 %

Manganese

2 %

Molybdenum

3 - 4 %

Nickel

13 - 16 %

Nitrogen

0.1 - 0.11 %

Phosphorus

0.05 %

Silicon

1 %

Sulfur

0.015 %


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