DIN 17745 Grade NiFe47Cr

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Description

The expansion material NiFe47Cr with the material number 2.4486 is an alloy with controlled thermal expansion and possesses a relatively low thermal expansion up to approximately 450 °C. (Temperature interval RT to 400 °C: coefficient of thermal expansion 10.0 to 10.8 10^-6 K^-1). Its expansion properties largely correspond to those of soft glass of the lead lime or sodium lime type up to the annealing temperature. Application for sealings in soft glasses, especially lead glasses, particularly for anode cavity caps in cathode-ray television tubes. The alloy is of relatively good durability at normal temperatures in air with normal weather conditions as well as in fresh water and sea water. Application as welding filler material, too. The material is well weldable by using the tungsten inert-gas method.

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 g/cm³

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Mechanical

PropertyTemperatureValueComment

Elastic modulus

20.0 °C

170 GPa

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Elongation

20.0 °C

3 - 35 %

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Hardness, Brinell

20.0 °C

120 - 280 [-]

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Poisson's ratio

23.0 °C

0.28 [-]

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Typical for Nickel Iron Alloy

Tensile strength

20.0 °C

510 - 950 MPa

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Yield strength Rp0.2

20.0 °C

200 - 930 MPa

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Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

100.0 °C

9.1E-6 1/K

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200.0 °C

9.1E-6 1/K

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300.0 °C

9.1E-6 1/K

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350.0 °C

9.5E-6 1/K

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400.0 °C

1.03E-5 1/K

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450.0 °C

1.1E-5 1/K

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500.0 °C

1.15E-5 1/K

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600.0 °C

1.22E-5 1/K

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Melting point

1450 °C

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Typical for Nickel Iron Alloy

Specific heat capacity

20.0 °C

500 J/(kg·K)

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Thermal conductivity

20.0 °C

14 W/(m·K)

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Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

9.2E-7 Ω·m

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Chemical properties

PropertyValue

Carbon

0.02 %

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Chromium

5.5 - 6.5 %

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Iron

44.5 - 47 %

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Manganese

1 %

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Nickel

45.18 %

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Silicon

0.3 %

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