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SEW 470 – Soft‑Annealed X10CrAlSi7 Chrome Steel (Grade X10CrAlSi7, +A)

The ferritic chrome steel X10CrAlSi7, mat. No 1.4713, shows very high resistance to oxidizing sulphureous gases, it is unsuitable for oxygen deficient and nitrogenous gases. Temperature limit for permanent operation accounts for 700 °C, scaling resistance up to 800 °C (highest application temperature in air). Application for oven components (sheet-metal brackets, tubes), in apparatus engineering for air preheater, annealing bells, pyrometer sheath tubes.

Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.65 - 7.7 g/cm³

Mechanical

PropertyTemperatureValueComment

Elastic modulus

20.0 °C

218 GPa

100.0 °C

213 GPa

200.0 °C

206 GPa

300.0 °C

198 GPa

400.0 °C

190 GPa

500.0 °C

180 GPa

600.0 °C

167 GPa

Elongation

20.0 °C

20 %

Elongation, transverse

20.0 °C

15 %

Hardness, Brinell

20.0 °C

192 [-]

Poisson's ratio

23.0 °C

0.3 [-]

Typical for Ferritic Stainless Steel

Shear modulus

23.0 °C

77 GPa

Typical for Ferritic Stainless Steel

Tensile strength

20.0 °C

420 - 620 MPa

Tensile strength, transverse

20.0 °C

420 - 620 MPa

Yield strength Rp0.2

20.0 °C

220 MPa

Yield strength Rp0.2, transverse

20.0 °C

220 MPa

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

-100.0 °C

1E-5 1/K

20.0 °C

1.08E-5 1/K

100.0 °C

1.13E-5 1/K

200.0 °C

1.15E-5 - 1.18E-5 1/K

300.0 °C

1.23E-5 1/K

400.0 °C

1.2E-5 - 1.27E-5 1/K

500.0 °C

1.3E-5 1/K

600.0 °C

1.25E-5 - 1.32E-5 1/K

800.0 °C

1.3E-5 1/K

Max service temperature, long

0 - 700 °C

Melting point

1425 - 1530 °C

Typical for Ferritic Stainless Steel

Specific heat capacity

20.0 °C

425 - 450 J/(kg·K)

100.0 °C

461 J/(kg·K)

200.0 °C

489 J/(kg·K)

300.0 °C

508 J/(kg·K)

400.0 °C

527 J/(kg·K)

500.0 °C

550 J/(kg·K)

600.0 °C

579 J/(kg·K)

700.0 °C

618 J/(kg·K)

Thermal conductivity

20.0 °C

20.5 - 23 W/(m·K)

100.0 °C

21.9 W/(m·K)

200.0 °C

23.2 W/(m·K)

300.0 °C

24.2 W/(m·K)

400.0 °C

24.9 W/(m·K)

500.0 °C

25 - 25.4 W/(m·K)

600.0 °C

25.6 W/(m·K)

700.0 °C

25.5 W/(m·K)

Thermal diffusivity

20.0 °C

6.3 mm²/s

100.0 °C

5.9 mm²/s

200.0 °C

5.8 mm²/s

300.0 °C

5.7 mm²/s

400.0 °C

5.4 mm²/s

500.0 °C

5 mm²/s

600.0 °C

4.4 mm²/s

700.0 °C

3.8 mm²/s

Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

7E-7 - 7.07E-7 Ω·m

100.0 °C

7.43E-7 Ω·m

200.0 °C

7.94E-7 Ω·m

300.0 °C

8.52E-7 Ω·m

400.0 °C

9.16E-7 Ω·m

500.0 °C

9.87E-7 Ω·m

600.0 °C

1.06E-6 Ω·m

700.0 °C

1.15E-6 Ω·m

Chemical properties

PropertyValue

Aluminium

0.5 - 1 %

Carbon

0.12 %

Chromium

6 - 8 %

Manganese

1 %

Phosphorus

0.04 %

Silicon

0.5 - 1 %

Sulfur

0.015 %


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