What is the composition of AISI H21 Hot Work Tool Steel?

Published composition ranges are not available for AISI H21 Hot Work Tool Steel in this record. The source entry did not carry a verified composition.

What standards cover AISI H21 Hot Work Tool Steel?

The governing standards for AISI H21 Hot Work Tool Steel include AISI H21, ASTM A681, UNS T20821. Mill certificates typically call out the most specific AMS or ASTM number applicable to the product form.

What is AISI H21 Hot Work 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 AISI H21 Hot Work 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.

AISI H21 Hot Work Tool Steel

UNS T20821 tool_steel

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Quick answer

AISI H21 Hot Work Tool Steel is a tool steel specified by AISI H21, ASTM A681, UNS T20821. Typical composition: .

H21 is a tungsten hot-work tool steel known for its excellent red hardness, good wear resistance, and resistance to softening at elevated temperatures. It is suitable for applications requiring strength and hardness at high operating temperatures.

Applicable Standards

AISI H21
ASTM A681
UNS T20821

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