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Alloy 42

For best performance of low-expansion properties, up to 300°C, look no further than Alloy 42

Alloy 42 has been specifically manufactured to provide a controlled low-expansion alloy, which exhibits low thermal expansion from cryogenic temperatures up to 300°C.

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About Alloy 42

This material has been specifically manufactured for industrial applications where a low Coefficient of Thermal Expansion (CTE) is required. The constraints of the specifications limit the Sulphur and Phosphorus content of the material for increased weldability.

Features of Alloy 42 include:

  • Low expansion rate up to 300°C
  • Readily weldable
  • Easily Machined

Properties

Density:
8.11 g/cm³
Melting Point:
1435°C
Curie temperature:
0.5 J/g K
Thermal Conductivity at 20°C:
10.5 J/cm.s°C
Modulus of Elasticity at 20°C:
150 MPa
Coefficient of Thermal Expansion:
30 – 300°C:
4.0 – 4.7 (10-6/°C)
30 – 450°C:
6.7 – 7.4 (10-6/°C)
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Applications

Gallery Image

Chemical Analysis

NiFeCMnSSiCrAlP
%41Balance0.05*0.8*0.025*0.3*0.25*0.1*0.025*

Typical Thermal Expansion

Alloy 42 versus Alloy 36 Thermal Expansion Chart

Specifications

UNS Number::
UNS K94100
German::
WS 1.3917
French::
DIN 17744, AFNOR NF A54-301
American::
ASTM F29, F30, B753. AMS 5683
Download the Alloy 42 Data Sheet Download

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