Super Invar® 32-5

Alternative and trade names
Super Invar 32-5
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Description

Super Invar 32-5 is a low expansion alloy consisting of 32% nickel, 5% cobalt, and balance iron. Super Invar Alloy exhibits minimum thermal expansion at room temperatures (one half of Invar Alloy), as well as thermal expansion properties less than that of Invar Alloy in the 67/203°F (-55/95°C) temperature range.

Related Standards

Equivalent Materials

This material data has been provided by Matmatch.

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

23.0 °C

8.15 g/cm³

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Mechanical

PropertyTemperatureValueComment

Elastic modulus

23.0 °C

145 GPa

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Elongation

23.0 °C

40 %

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in 2 in.

Hardness, Rockwell B

23.0 °C

75 [-]

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Tensile strength

23.0 °C

483 MPa

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Yield strength

23.0 °C

276 MPa

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Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

100.0 °C

8.4E-7 1/K

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from 20°C to the mentioned temperature

150.0 °C

1.17E-6 1/K

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from 20°C to the mentioned temperature

200.0 °C

1.72E-6 1/K

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from 20°C to the mentioned temperature

250.0 °C

2.53E-6 1/K

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from 20°C to the mentioned temperature

300.0 °C

4.16E-6 1/K

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from 20°C to the mentioned temperature

350.0 °C

5.74E-6 1/K

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from 20°C to the mentioned temperature

400.0 °C

7.03E-6 1/K

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from 20°C to the mentioned temperature

500.0 °C

8.99E-6 1/K

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from 20°C to the mentioned temperature

550.0 °C

1.06E-5 1/K

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from 20°C to the mentioned temperature

700.0 °C

1.16E-5 1/K

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from 20°C to the mentioned temperature

800.0 °C

1.22E-5 1/K

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from 20°C to the mentioned temperature

900.0 °C

1.3E-5 1/K

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from 20°C to the mentioned temperature

Melting point

1427 °C

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Specific heat capacity

23.0 °C

502 J/(kg·K)

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Thermal conductivity

23.0 °C

10 W/(m·K)

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Electrical

PropertyTemperatureValue

Electrical resistivity

23.0 °C

8.2E-7 Ω·m

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Magnetic

PropertyValue

Curie temperature

245 °C

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Chemical properties

PropertyValue

Carbon

0.05 %

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Chromium

0.25 %

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Cobalt

5 %

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Iron

Balance

Nickel

32 %

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Silicon

0.25 %

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Sulfur

0.015 %

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Technological properties

Property
Application areas

Common applications of Super Invar 32-5 are: Optical instruments . Telescopes . Laser instruments and equipment . Ring laser gyroscopes . Laser benches . Positioning devices . Metrology devices . Structural components . Substrates in instrument systems requiring precision measurements