What is the composition of 303 Stainless Steel?

Published composition ranges are not available for 303 Stainless 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 303 Stainless Steel?

The governing standards for 303 Stainless Steel include ASTM A582, SAE J405, UNS S30300. Mill certificates typically call out the most specific AMS or ASTM number applicable to the product form.

What is 303 Stainless Steel used for?

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

How do I verify a mill certificate for 303 Stainless 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.

303 Stainless Steel

UNS S30300 stainless

Validate composition

Quick answer

303 Stainless Steel is a stainless specified by ASTM A582, SAE J405, UNS S30300. Typical composition: .

A free-machining austenitic stainless steel, Type 303 is the most readily machinable of all the austenitic stainless steels. Its excellent machinability is due to the addition of sulfur, which forms manganese sulfide inclusions.

Applicable Standards

ASTM A582
SAE J405
UNS S30300

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