You buy material to A240 (chemistry/strength), but the mill ships it to A480 (dimensions/tolerances).
It defines finishes from No. 1 (dull, heat-treated) to No. 8 (mirror-like). astm a480 a480m pdf
This standard acts as an "umbrella" specification; it doesn't define the chemical composition of a specific grade (like 304 or 316), but rather the rules for how those materials must be manufactured, measured, and tested. A480/A480M Standard Specification for General ... - ASTM The Ultimate Guide to ASTM A480/A480M: How to
The "M" in A480M indicates that the standard includes . Professionals often seek the ASTM A480 A480M PDF to access critical tolerance tables and finish definitions required for procurement and quality control. Key Components of the Specification 8 (mirror-like)
covers the general requirements for flat-rolled stainless and heat-resisting steel products in the form of:
| Specified Thickness (in) | Width ≤ 60" (in) | Width > 60–84" (in) | |--------------------------|------------------|----------------------| | 3/16 to < 3/8 | ±0.011 | ±0.012 | | 3/8 to < 3/4 | ±0.015 | ±0.016 | | 3/4 to < 1 | ±0.022 | ±0.024 |