What is the composition of AISI 4820 Nickel-Molybdenum Steel?

Published composition ranges are not available for AISI 4820 Nickel-Molybdenum Steel in this record. The source entry did not carry a verified composition.

What standards cover AISI 4820 Nickel-Molybdenum Steel?

The governing standards for AISI 4820 Nickel-Molybdenum Steel include AISI 4820, SAE 4820, ASTM A29, ASTM A322. Mill certificates typically call out the most specific AMS or ASTM number applicable to the product form.

What is AISI 4820 Nickel-Molybdenum Steel used for?

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

How do I verify a mill certificate for AISI 4820 Nickel-Molybdenum 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 4820 Nickel-Molybdenum Steel

UNS K81920 low_alloy_steel

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Quick answer

AISI 4820 Nickel-Molybdenum Steel is a low alloy steel specified by AISI 4820, SAE 4820, ASTM A29, ASTM A322. Typical composition: .

AISI 4820 is a low-alloy, case-hardening steel known for its high nickel content, providing excellent core strength, toughness, and wear resistance after carburizing. It is suitable for heavy-duty applications requiring a hard surface and a strong, ductile core.

Applicable Standards

AISI 4820
SAE 4820
ASTM A29
ASTM A322

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