What is the composition of JIS SCM440 Chromium-Molybdenum Steel?

Published composition ranges are not available for JIS SCM440 Chromium-Molybdenum 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 JIS SCM440 Chromium-Molybdenum Steel?

The governing standards for JIS SCM440 Chromium-Molybdenum Steel include JIS G4105, UNS G41400 (equivalent to AISI 4140). Mill certificates typically call out the most specific AMS or ASTM number applicable to the product form.

What is JIS SCM440 Chromium-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 JIS SCM440 Chromium-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.

JIS SCM440 Chromium-Molybdenum Steel

UNS G41400 low_alloy_steel

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Quick answer

JIS SCM440 Chromium-Molybdenum Steel is a low alloy steel specified by JIS G4105, UNS G41400 (equivalent to AISI 4140). Typical composition: .

JIS SCM440 is a medium-carbon chromium-molybdenum alloy steel, widely used for its high strength, toughness, and good hardenability. It is often used in applications requiring high fatigue strength and wear resistance.

Applicable Standards

JIS G4105
UNS G41400 (equivalent to AISI 4140)

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