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DIN 17440 X4CrMoS18 Soft Annealed Steel – Superior Corrosion Resistance & Versatile Fastener Applications

Properties: - stainless free cutting steel - application in quenched and tempered state - corrosion resistance is similar to an 13%-Cr-steel, because of its sulfur additional - application temperature: -25 to 550 °C Application: - for application enviroment like water, steam, weak alkaline and neutral media - for screws, nuts, fittings, axis, bolts, spindles - for magnetic valve

Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.65 - 7.7 g/cm³

Mechanical

PropertyTemperatureValueComment

Elastic modulus

20.0 °C

196 - 216 GPa

100.0 °C

213 GPa

200.0 °C

207 GPa

300.0 °C

200 GPa

400.0 °C

192 GPa

Elongation

20.0 °C

20 %

Hardness, Brinell

20.0 °C

200 [-]

Poisson's ratio

23.0 °C

0.3 [-]

Typical for Martensitic Stainless Steel

Shear modulus

23.0 °C

77 GPa

Typical for Martensitic Stainless Steel

Tensile strength

20.0 °C

450 - 650 MPa

Yield strength Rp0.2

20.0 °C

270 MPa

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

-100.0 °C

9.2E-6 1/K

20.0 °C

9.9E-6 1/K

100.0 °C

1E-5 - 1.03E-5 1/K

200.0 °C

1.05E-5 - 1.08E-5 1/K

300.0 °C

1.05E-5 - 1.12E-5 1/K

400.0 °C

1.05E-5 - 1.16E-5 1/K

500.0 °C

1.1E-5 - 1.19E-5 1/K

600.0 °C

1.21E-5 1/K

700.0 °C

1.24E-5 1/K

800.0 °C

1.29E-5 1/K

900.0 °C

1.34E-5 1/K

1000.0 °C

1.39E-5 1/K

Melting point

1370 - 1530 °C

Typical for Martensitic Stainless Steel

Specific heat capacity

20.0 °C

450 - 460 J/(kg·K)

100.0 °C

482 J/(kg·K)

200.0 °C

506 J/(kg·K)

300.0 °C

525 J/(kg·K)

400.0 °C

547 J/(kg·K)

500.0 °C

576 J/(kg·K)

600.0 °C

616 J/(kg·K)

Thermal conductivity

20.0 °C

19.6 - 25 W/(m·K)

Thermal diffusivity

20.0 °C

5.7 mm²/s

Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

6.17E-7 - 7E-7 Ω·m

Chemical properties

PropertyValue

Carbon

0.06 %

Chromium

16.5 - 18.5 %

Manganese

1.5 %

Molybdenum

0.2 - 0.6 %

Phosphorus

0.06 %

Silicon

1 %

Sulfur

0.15 - 0.35 %


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