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DIN 17440 Grade X4CrNi18-12 Heat‑Treated Stainless Steel – Corrosion‑Resistant Wire & Components

According DIN 17440 : 1996-09 the steel X4CrNi18-12, mat. no. 1.4303, is used for wire and is resistant to intercrystalline corrosion in the delivery condition (for thicknesses up to 6 mm and diameter up to 40 mm) and in the welded condition (possible limited by the chemical composition and the welding condition. Acc. DIN 17400 : 1985-07 (X 5 CrNi 18 12) and DIN EN 10088-1,-2,-3 : 1995-08 (X4CrNi18-12) application in the chemical industry as well as for the production of screws, nuts and cold extrudings. The steel is, like the grade X5CrNi18-10 (1.4301), high resistant to corrosion and resistant up to an ph-value of 4.5 to weak chlorides. In the civil engineering the X4CrNi18-12 is used for joining elements. Standard parts like screws, nuts and threads are made by non-cutting processing.

Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.9 - 7.93 g/cm³

Mechanical

PropertyTemperatureValue

Elastic modulus

-100.0 °C

206 GPa

20.0 °C

196 - 202.24 GPa

100.0 °C

190 - 194.36 GPa

200.0 °C

182 - 186 GPa

300.0 °C

174 - 179 GPa

400.0 °C

166 - 172 GPa

500.0 °C

157.59 - 165 GPa

600.0 °C

149.24 - 150 GPa

700.0 °C

142 GPa

800.0 °C

134 GPa

900.0 °C

127 GPa

1000.0 °C

120 GPa

Poisson's ratio

20.0 °C

0.29 [-]

100.0 °C

0.29 [-]

200.0 °C

0.3 [-]

300.0 °C

0.3 [-]

400.0 °C

0.31 [-]

500.0 °C

0.32 [-]

600.0 °C

0.33 [-]

Shear modulus

20.0 °C

78.33 GPa

100.0 °C

75.08 GPa

200.0 °C

71.07 GPa

300.0 °C

67.21 GPa

400.0 °C

63.34 GPa

500.0 °C

59.64 GPa

600.0 °C

56.08 GPa

Tensile strength

20.0 °C

800 - 900 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

1.7E-5 - 1.72E-5 1/K

300.0 °C

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

400.0 °C

1.8E-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

14.3 - 15 W/(m·K)

100.0 °C

15.8 W/(m·K)

200.0 °C

17.5 W/(m·K)

300.0 °C

19 W/(m·K)

400.0 °C

20.5 W/(m·K)

500.0 °C

21.9 W/(m·K)

600.0 °C

23.3 W/(m·K)

700.0 °C

24.6 W/(m·K)

800.0 °C

26 W/(m·K)

900.0 °C

27.4 W/(m·K)

1000.0 °C

28.8 W/(m·K)

Thermal diffusivity

20.0 °C

3.8 mm²/s

100.0 °C

4 mm²/s

200.0 °C

4.2 mm²/s

300.0 °C

4.6 mm²/s

400.0 °C

4.8 mm²/s

500.0 °C

4.9 mm²/s

600.0 °C

5 mm²/s

700.0 °C

5.3 mm²/s

800.0 °C

5.6 mm²/s

900.0 °C

5.9 mm²/s

1000.0 °C

6 mm²/s

Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

7.1E-7 - 7.3E-7 Ω·m

100.0 °C

7.76E-7 Ω·m

200.0 °C

8.49E-7 Ω·m

300.0 °C

9.14E-7 Ω·m

400.0 °C

9.71E-7 Ω·m

500.0 °C

1.02E-6 Ω·m

600.0 °C

1.07E-6 Ω·m

700.0 °C

1.1E-6 Ω·m

800.0 °C

1.14E-6 Ω·m

900.0 °C

1.17E-6 Ω·m

1000.0 °C

1.19E-6 Ω·m

Chemical properties

PropertyValue

Carbon

0.06 %

Chromium

17 - 19 %

Manganese

2 %

Nickel

11 - 13 %

Nitrogen

0.11 %

Phosphorus

0.05 %

Silicon

1 %

Sulfur

0.015 - 0.03 %


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