What is the composition of REX 20 High-Speed Tool Steel?

Published composition ranges are not available for REX 20 High-Speed Tool Steel 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 REX 20 High-Speed Tool Steel?

The governing standards for REX 20 High-Speed Tool Steel include ASTM A600 (M42). Mill certificates typically call out the most specific AMS or ASTM number applicable to the product form.

What is REX 20 High-Speed Tool Steel used for?

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

How do I verify a mill certificate for REX 20 High-Speed Tool Steel?

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.

REX 20 High-Speed Tool Steel

UNS T11342 tool_steel

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Quick answer

REX 20 High-Speed Tool Steel is a tool steel specified by ASTM A600 (M42). Typical composition: .

REX 20 is a cobalt-bearing molybdenum-tungsten high-speed tool steel, equivalent to M42. It offers exceptional hot hardness, wear resistance, and cutting performance, making it suitable for demanding machining operations.

Applicable Standards

ASTM A600 (M42)

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