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EN 10088-1 X6CrMoS17 Soft Annealed Steel – High-Performance Stainless Free Cutting Grade

Material X6CrMoS17 is comparable to X 4 CrMoS 18 acc. to DIN 17440 : 1985-07. The stainless free cutting steel is applicated in tempered condition as construction parts for machine processing, such as screws, nuts, fittings, axles, bolts, spindles as well as for magnetic valves. Application in water, steam as well as in alkalescent and neutral media. Corrosion resistance is due to sulphur addition equivalent to a 13 per cent Cr-steel. Welding is not common.

Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.65 - 7.7 g/cm³

Mechanical

PropertyTemperatureValueComment

Elastic modulus

20.0 °C

196 - 220 GPa

100.0 °C

215 GPa

200.0 °C

210 GPa

300.0 °C

205 GPa

400.0 °C

195 GPa

Elongation

20.0 °C

7 - 20 %

Hardness, Brinell

20.0 °C

200 [-]

Hardness, Brinell, trans

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

430 - 950 MPa

Tensile strength, transverse

20.0 °C

430 - 630 MPa

Yield strength Rp0.2

20.0 °C

250 - 330 MPa

100.0 °C

230 MPa

150.0 °C

220 MPa

200.0 °C

215 MPa

250.0 °C

210 MPa

300.0 °C

205 MPa

350.0 °C

200 MPa

400.0 °C

195 MPa

Yield strength Rp0.2, transverse

20.0 °C

250 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

0.08 %

Chromium

16 - 18 %

Manganese

1.5 %

Molybdenum

0.2 - 0.6 %

Phosphorus

0.04 %

Silicon

1.5 %

Sulfur

0.15 - 0.35 %


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