ASTM A276/A276M — Standard Specification for Stainless Steel Bars and Shapes
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Scope
Hot-finished and cold-finished stainless bars (round, square, hex, flat), shapes and forgings stock in austenitic, ferritic, martensitic and duplex grades (303, 304, 316, 321, 410, 420, 430, 431, 440C, 2205, 17-4 by reference to A564…). Conditions A (annealed), H (hardened & tempered), T (tempered), S (strain-hardened). Companion A479 covers bars for boilers and pressure vessels; A484 the general requirements and tolerances.
Grades covered by ASTM A276
| Grade | No. | Type | C % | Yield MPa | Tensile MPa | Nearest equivalents |
|---|---|---|---|---|---|---|
| 410 | S41000 | Martensitic chromium stainless steel, hardenable | ≤ 0.15 | ≥ 275 | ≥ 485 | 1.4006, SUS410, 12Cr13 |
Revision history and superseded standards
| Year | Change |
|---|---|
| 1944 | First issued |
| 2023 | A276/A276M-23 — current |
Where to buy the standard
The full text is copyrighted by ASTM International and is not reproduced here. Purchase the current edition from ASTM International or your national standards body. The values on this site are the normative limits as published; the standard's own tables, notes and test methods govern.
Related standards
Bar and shapes, hot-finished or cold-finished
A276 is the American specification for stainless steel bars and shapes, covering hot-finished and cold-finished round, square, hexagon and flat bar together with angles and other shapes. It is the bar counterpart of A240, and the two are not interchangeable for the same reason EN 10088 parts 2 and 3 are not.
Mechanical minimums depend on the finish. Cold-finished bar tests stronger than hot-finished bar in the same grade because drawing work-hardens the surface, and the annealed condition is the reference state to which corrosion data applies.
Where A276, A479 and A484 divide
Three documents share this territory. A276 covers general-purpose stainless bar and shapes. A479 covers bar for boilers and pressure vessels, with tighter testing and additional requirements. A484 carries the general requirements — tolerance, finish, marking, permitted repair — for all of them.
A purchase order that names only a grade has specified an alloy; one that names A276 plus the grade plus the condition has specified a product. For pressure duty the correct reference is A479, and substituting A276 material is a documentation failure even where the analysis matches.