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SEW 555 27NiCrMoV11-6 Quenched & Tempered Steel – High-Performance Turbine & Generator Shafts

The high temperature alloy steel 27NiCrMoV11-6 is used for larger preshaped components in the quenched and tempered condition in turbine and generator installations, in particular as shafts and discs. The steel is weldable if the relevant measures required are observed.

Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.8 - 7.85 g/cm³

Mechanical

PropertyTemperatureValueComment

Elastic modulus

-100.0 °C

217 GPa

20.0 °C

212 GPa

100.0 °C

207 GPa

200.0 °C

199 GPa

300.0 °C

192 GPa

400.0 °C

184 GPa

500.0 °C

175 GPa

600.0 °C

164 GPa

Elongation, transverse

20.0 °C

11 - 13 %

Poisson's ratio

23.0 °C

0.3 [-]

Typical for Steel

Reduction of area, transverse

20.0 °C

40 %

Tensile strength, transverse

20.0 °C

750 - 1050 MPa

Yield strength Rp0.2

100.0 °C

570 - 710 MPa

200.0 °C

545 - 675 MPa

250.0 °C

530 - 650 MPa

300.0 °C

510 - 630 MPa

350.0 °C

485 - 600 MPa

400.0 °C

450 - 555 MPa

450.0 °C

400 - 505 MPa

500.0 °C

340 - 445 MPa

Yield strength Rp0.2, transverse

20.0 °C

600 - 750 MPa

Thermal

PropertyTemperatureValue

Coefficient of thermal expansion

-100.0 °C

1.05E-5 1/K

20.0 °C

1.15E-5 1/K

100.0 °C

1.21E-5 1/K

200.0 °C

1.27E-5 1/K

300.0 °C

1.32E-5 1/K

400.0 °C

1.36E-5 1/K

500.0 °C

1.4E-5 1/K

600.0 °C

1.44E-5 1/K

Specific heat capacity

-100.0 °C

423 J/(kg·K)

20.0 °C

461 J/(kg·K)

100.0 °C

479 J/(kg·K)

200.0 °C

499 J/(kg·K)

300.0 °C

517 J/(kg·K)

400.0 °C

536 J/(kg·K)

500.0 °C

558 J/(kg·K)

600.0 °C

587 J/(kg·K)

Thermal conductivity

20.0 °C

33.7 W/(m·K)

100.0 °C

36.2 W/(m·K)

200.0 °C

37.8 W/(m·K)

300.0 °C

37.2 W/(m·K)

400.0 °C

35.7 W/(m·K)

500.0 °C

34 W/(m·K)

600.0 °C

32 W/(m·K)

Thermal diffusivity

20.0 °C

9.4 mm²/s

100.0 °C

9.4 mm²/s

200.0 °C

9.2 mm²/s

300.0 °C

8.5 mm²/s

400.0 °C

7.6 mm²/s

500.0 °C

6.6 mm²/s

600.0 °C

5.4 mm²/s

Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

3.09E-7 Ω·m

100.0 °C

3.54E-7 Ω·m

200.0 °C

4.18E-7 Ω·m

300.0 °C

5.05E-7 Ω·m

400.0 °C

6.09E-7 Ω·m

500.0 °C

7.27E-7 Ω·m

600.0 °C

8.67E-7 Ω·m

Chemical properties

PropertyValue

Carbon

0.22 - 0.32 %

Chromium

1.2 - 1.8 %

Manganese

0.15 - 0.4 %

Molybdenum

0.25 - 0.45 %

Nickel

2.4 - 3.1 %

Phosphorus

0.01 %

Silicon

0.15 %

Sulfur

7E-3 %

Vanadium

0.05 - 0.15 %


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