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Alloy 42

Alloy 42 / UNS K94100 / 1.3917

Alloy 42 is a low expansion alloy which is very similar to Invar 36. It has a low expansion up to about 300℃. Principally used as strip for semiconductor lead frames in integrated circuits and bi-metal strip.
The alloy can be also used in ceramic to metal seals with alumina and the glass bulb envelope to metal seals. 

Alloy 42 Chemical Composition:
Grade C% P% S% Mn% Si% Al% Co% Ni% Fe%
Alloy 42 Max 0.05 Max 0.020 Max 0.020 Max 0.80 Max 0.30 Max 0.10 Max 1.0 41.0-42.5 Bal.

Alloy 42 Physical Properties:
Grade Density Melting Point Electric Resistivity
Alloy 42 8.12 g/cm3 1440°C 0.61μΩ·m

Alloy 42 Mechanical Properties:
Grade Tensile Strength N/mm²
Soft Hard
Alloy 42 Strip <590 >700

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Alloy Fasteners

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