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EN 10269 NiCr20TiAl: Solution Heat‑Treated & Precipitation Hardened for High‑Temperature Aerospace Applications

NiCr20TiAl as a aviation material, material number 2.4631, is contained in `Werkstoff-Leistungsblättern der Deutschen Luftfahrt WL` (material data sheets) 2.4631, part 1 and 2 as well as part 100, issues 08.93. This material shows high creep strength up to 850 °C and very good scaling resistance. The nickel-chromium-alloy is hardenable due to the addition of aluminium and titanium. Its corrosion resistance is similar to NiCr20Ti. Application for maximum loaded components, such as gas turbine blades, discs, shafts, pre-combustion chambers in diesel engines, valves, hot working tools, sledge hammer, die blocks, pressing tools, shearing blades, screws and nuts. Processing properties: formability: well (annealed) weldability: possible, but unusual

Properties

General

PropertyTemperatureValue

Density

20.0 °C

8.2 g/cm³

Mechanical

PropertyTemperatureValue

Elastic modulus

20.0 °C

216 GPa

100.0 °C

212 GPa

200.0 °C

208 GPa

300.0 °C

202 GPa

400.0 °C

196 GPa

500.0 °C

189 GPa

600.0 °C

179 GPa

700.0 °C

161 GPa

800.0 °C

130 GPa

Elongation

20.0 °C

12 %

Reduction of area

20.0 °C

12 %

Tensile strength

20.0 °C

1000 - 1300 MPa

50.0 °C

1000 - 1070 MPa

100.0 °C

975 - 1044 MPa

150.0 °C

950 - 1017 MPa

200.0 °C

900 - 990 MPa

250.0 °C

900 - 966 MPa

300.0 °C

900 - 942 MPa

350.0 °C

900 - 932 MPa

400.0 °C

900 - 922 MPa

450.0 °C

900 - 903 MPa

500.0 °C

590 - 883 MPa

550.0 °C

859 - 880 MPa

600.0 °C

834 - 850 MPa

Yield strength Rp0.2

20.0 °C

600 MPa

50.0 °C

595 MPa

100.0 °C

586 MPa

150.0 °C

577 MPa

200.0 °C

568 MPa

250.0 °C

564 MPa

300.0 °C

560 MPa

350.0 °C

550 MPa

400.0 °C

540 MPa

450.0 °C

530 MPa

500.0 °C

520 MPa

550.0 °C

510 MPa

600.0 °C

500 MPa

650.0 °C

480 MPa

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

100.0 °C

1.29E-5 1/K

200.0 °C

1.34E-5 1/K

300.0 °C

1.38E-5 1/K

400.0 °C

1.43E-5 1/K

500.0 °C

1.47E-5 1/K

600.0 °C

1.52E-5 1/K

Max service temperature, long

0 - 1000 °C

Melting point

1400 °C

Typical for Nickel Chromium Alloy

Specific heat capacity

20.0 °C

460 J/(kg·K)

Thermal conductivity

20.0 °C

11.4 - 13 W/(m·K)

Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

1.24E-6 Ω·m

Chemical properties

PropertyValue

Aluminium

1 - 1.8 %

Boron

8E-3 %

Carbon

0.04 - 0.1 %

Chromium

18 - 21 %

Cobalt

1 %

Copper

0.2 %

Iron

1.5 %

Manganese

1 %

Nickel

65 %

Phosphorus

0.02 %

Silicon

1 %

Sulfur

0.015 %

Titanium

1.8 - 2.7 %


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