What is the composition of ASTM A709 Grade 50W Weathering Steel?

Published composition ranges are not available for ASTM A709 Grade 50W Weathering Steel in this record. The source entry did not carry a verified composition.

What standards cover ASTM A709 Grade 50W Weathering Steel?

The governing standards for ASTM A709 Grade 50W Weathering Steel include ASTM A709 Grade 50W, ASTM A588 Grade A. Mill certificates typically call out the most specific AMS or ASTM number applicable to the product form.

What is ASTM A709 Grade 50W Weathering 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 ASTM A709 Grade 50W Weathering 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.

ASTM A709 Grade 50W Weathering Steel

UNS K12000 low_alloy_steel

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Quick answer

ASTM A709 Grade 50W Weathering Steel is a low alloy steel specified by ASTM A709 Grade 50W, ASTM A588 Grade A. Typical composition: .

ASTM A709 Grade 50W is a high-strength low-alloy structural steel with improved atmospheric corrosion resistance, commonly known as weathering steel. It is primarily used in welded bridges and other structural applications where reduced maintenance from painting is desired.

Applicable Standards

ASTM A709 Grade 50W
ASTM A588 Grade A

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