ASTM A480/A480M is a standard specification developed by ASTM International (formerly the American Society for Testing and Materials). The full title is Standard Specification for General Requirements for Flat-Rolled Stainless and Heat-Resisting Steel Plate, Sheet, and Strip .
ASTM A480 / A480M is the standard specification for the general requirements of and heat-resisting steel plate, sheet, and strip . It serves as a foundational document that defines the dimensions, tolerances, finishes, and testing protocols used across various specific material grades. Latest Editions and Documentation
Provides exhaustive tables for:
Because the standard is revised frequently to account for new technology and alloys, engineers must always refer to the current year's version
: To prevent "material mix-ups," A480 mandates how products must be labeled with heat numbers, grades, and manufacturer names, ensuring full traceability from the mill to the end-user. The "A480" vs. "A480M" Distinction
The full title of this standard is .
ASTM revises standards every 5–8 years. Recent updates to A480/A480M have refined thickness tolerances for wide sheets (over 60 inches) and added new surface finish designations for digital laser measurement.
The most recent published revision is ASTM A480 / A480M - 25b , released on September 1, 2025.
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