DIN 17742 Grade NiCr7030 solution annealed (+AT)

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Description

The material NiCr7030 with the material number 2.4658, which is applied in the form of strips and wires (see also heating conductor alloys according to DIN 17470 or electrical resistance alloys according to DIN 17471) for furnace construction components and heating conductors, is an austenitic nickel-chromium electrical reistance alloy. This alloy distinguishes itself by good scale-resistance as well as by durability under alternating stress in oxidizing/reducing atmosphere for operating temperatures of up to 1250 °C. Application for industrial electric furnaces, enamelling furnaces and night-current storage space-heaters. Processing properties: Formability: good Weldability: satisfactory

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

8.1 - 8.2 g/cm³

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Mechanical

PropertyTemperatureValue

Elastic modulus

20.0 °C

200 GPa

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Elongation

20.0 °C

25 %

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Hardness, Brinell

20.0 °C

200 [-]

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Tensile strength

20.0 °C

700 MPa

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Yield strength Rp0.2

20.0 °C

300 MPa

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Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

100.0 °C

1.35E-5 1/K

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200.0 °C

1.4E-5 1/K

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400.0 °C

1.5E-5 1/K

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600.0 °C

1.55E-5 1/K

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800.0 °C

1.6E-5 1/K

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Max service temperature, long

0 - 1250 °C

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Melting point

1400 °C

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Typical for Nickel Chromium Alloy

Specific heat capacity

20.0 °C

420 - 460 J/(kg·K)

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Thermal conductivity

20.0 °C

13 - 13.8 W/(m·K)

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Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

1.1E-6 - 1.19E-6 Ω·m

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100.0 °C

1.14E-6 Ω·m

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200.0 °C

1.16E-6 Ω·m

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300.0 °C

1.18E-6 Ω·m

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400.0 °C

1.2E-6 Ω·m

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500.0 °C

1.22E-6 Ω·m

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600.0 °C

1.21E-6 Ω·m

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700.0 °C

1.21E-6 Ω·m

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800.0 °C

1.22E-6 Ω·m

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900.0 °C

1.23E-6 Ω·m

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1000.0 °C

1.24E-6 Ω·m

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1100.0 °C

1.26E-6 Ω·m

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Chemical properties

PropertyValue

Aluminium

0.3 %

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Carbon

0.1 %

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Chromium

29 - 32 %

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Copper

0.5 %

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Iron

5 %

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Manganese

1 %

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Nickel

60 %

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Phosphorus

0.02 %

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Silicon

0.5 - 2 %

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Sulfur

0.015 %

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