What is the composition of Alloy 42 Nickel-Iron Controlled Expansion Alloy?

Published composition ranges are not available for Alloy 42 Nickel-Iron Controlled Expansion Alloy in this record. PARTIAL - parsed from a truncated 500-char source excerpt; the element set is INCOMPLETE and must NOT be used for validation, specification or purchasing

What standards cover Alloy 42 Nickel-Iron Controlled Expansion Alloy?

The governing standards for Alloy 42 Nickel-Iron Controlled Expansion Alloy include ASTM F30, MIL-I-23011 Class 1. Mill certificates typically call out the most specific AMS or ASTM number applicable to the product form.

How do I verify a mill certificate for Alloy 42 Nickel-Iron Controlled Expansion Alloy?

Compare each element value on the certificate against the min/max ranges in the spec table above. Paste the values into the SpecBase validator to get an automated pass/fail check.

Alloy 42 Nickel-Iron Controlled Expansion Alloy

Q: What is Alloy 42 Nickel-Iron Controlled Expansion Alloy used for?

This alloy is used in applications demanding the property set described in its family: special.

UNS K94100 special

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Quick answer

Alloy 42 Nickel-Iron Controlled Expansion Alloy is a special specified by ASTM F30, MIL-I-23011 Class 1. Typical composition: .

A nickel-iron controlled expansion alloy with a nominal 42% nickel content, designed for hermetic glass-to-metal seals and other applications requiring a low and constant coefficient of thermal expansion.

Applicable Standards

ASTM F30
MIL-I-23011 Class 1

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