DIN 17742 Grade NiCr20TiAl precipitation hardened (+P)

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Description

The highly creep-resistant aviation material NiCr20TiAl with the material number 2.4631 is contained in the Werkstoff-Leistungsblatt der Deutschen Luftfahrt editions WL 2.4631-1 : 1993-08, WL 2.4631-2 : 1993-08 and WL 2.4631-100 : 1993-08. DIN 17742 among other things contains the material NiCr20TiAl with the material number 2.4952. The material is hardenable, highly creep-resistant and scale-resistant up to about 1000 °C. NiCr20TiAl is corrosion-resistant, yet vanadin-pentoxide, sodium- und sulphur compounds can lead to hot-gas corrosion. Application for gas turbine blades, gas turbine rings and discs as well as for screws for operating temperatures up to about 815 °C. Processing properties: Formability: good (annealed) Weldability: possible, but not common (Werkstoff-Leistungsblatt der Deutschen Luftfahrt/WL: material specification of the German aviation)

Related Standards

Equivalent Materials

This material data has been provided by WIAM.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

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Properties

General

PropertyTemperatureValue

Density

20.0 °C

8.2 - 8.3 g/cm³

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Mechanical

PropertyTemperatureValue

Elastic modulus

20.0 °C

215 - 222 GPa

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100.0 °C

212 - 217 GPa

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200.0 °C

205 - 210 GPa

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300.0 °C

202 - 204 GPa

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400.0 °C

195 - 197 GPa

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450.0 °C

193 GPa

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500.0 °C

189 - 191 GPa

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550.0 °C

184 GPa

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600.0 °C

179 - 183 GPa

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700.0 °C

161 - 176 GPa

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800.0 °C

130 - 166 GPa

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900.0 °C

150 - 153 GPa

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1000.0 °C

140 GPa

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Elongation

20.0 °C

12 - 20 %

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Elongation, transverse

20.0 °C

15 - 25 %

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Hardness, Brinell

20.0 °C

277 [-]

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Reduction of area

20.0 °C

12 - 25 %

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Tensile strength

20.0 °C

1000 - 1400 MPa

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Tensile strength, transverse

20.0 °C

1030 MPa

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Yield strength Rp0.2

20.0 °C

600 - 725 MPa

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200.0 °C

568 - 745 MPa

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250.0 °C

564 MPa

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300.0 °C

560 - 735 MPa

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350.0 °C

550 MPa

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400.0 °C

540 - 726 MPa

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450.0 °C

530 MPa

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500.0 °C

520 - 716 MPa

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550.0 °C

510 MPa

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600.0 °C

500 - 696 MPa

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650.0 °C

480 MPa

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700.0 °C

628 MPa

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800.0 °C

431 MPa

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900.0 °C

196 MPa

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1000.0 °C

39 MPa

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Yield strength Rp0.2, transverse

20.0 °C

640 MPa

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Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

100.0 °C

1.11E-5 - 1.19E-5 1/K

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200.0 °C

1.21E-5 - 1.27E-5 1/K

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300.0 °C

1.29E-5 - 1.32E-5 1/K

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400.0 °C

1.35E-5 - 1.37E-5 1/K

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500.0 °C

1.37E-5 - 1.41E-5 1/K

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600.0 °C

1.4E-5 - 1.48E-5 1/K

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700.0 °C

1.45E-5 - 1.55E-5 1/K

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800.0 °C

1.51E-5 - 1.63E-5 1/K

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900.0 °C

1.58E-5 - 1.74E-5 1/K

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1000.0 °C

1.88E-5 1/K

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Max service temperature, long

0 - 1000 °C

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Melting point

1400 °C

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Typical for Nickel Chromium Alloy

Specific heat capacity

20.0 °C

430 - 460 J/(kg·K)

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100.0 °C

590 J/(kg·K)

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200.0 °C

590 J/(kg·K)

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300.0 °C

590 J/(kg·K)

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400.0 °C

590 J/(kg·K)

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450.0 °C

590 J/(kg·K)

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500.0 °C

590 J/(kg·K)

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550.0 °C

590 J/(kg·K)

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600.0 °C

590 J/(kg·K)

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700.0 °C

590 J/(kg·K)

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800.0 °C

590 J/(kg·K)

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Thermal conductivity

20.0 °C

13 W/(m·K)

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100.0 °C

12 - 14 W/(m·K)

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200.0 °C

15 W/(m·K)

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300.0 °C

16 W/(m·K)

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400.0 °C

17 W/(m·K)

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500.0 °C

18 W/(m·K)

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600.0 °C

20 W/(m·K)

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700.0 °C

23 W/(m·K)

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800.0 °C

25 W/(m·K)

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900.0 °C

28 W/(m·K)

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Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

1.24E-6 Ω·m

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Chemical properties

PropertyValue

Aluminium

1 - 1.8 %

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Boron

8E-3 %

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Carbon

0.04 - 0.1 %

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Chromium

18 - 21 %

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Cobalt

1 - 2 %

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Copper

0.2 %

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Iron

1.5 - 3 %

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Manganese

1 %

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Nickel

65 - 68.7 %

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Phosphorus

0.02 - 0.03 %

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Silicon

1 %

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Sulfur

0.015 %

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Titanium

1.8 - 2.7 %

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