ASTM A36/A36M — Standard Specification for Carbon Structural Steel
Scope
Carbon structural steel shapes, plate and bar for riveted, bolted or welded construction of bridges and buildings and for general structural purposes: one grade with 250 MPa (36 ksi) minimum yield and 400–550 MPa tensile (220 MPa yield above 200 mm plate). Chemistry varies by product and thickness; supplementary requirements S5 (Charpy), S91/S92 (CE and fine grain). Adopted by ASME as SA-36 and AASHTO as M270 Grade 36 via A709.
Grades covered by ASTM A36
| Grade | No. | Type | C % | Yield MPa | Tensile MPa | Nearest equivalents |
|---|---|---|---|---|---|---|
| A36 | K02600 | Carbon structural steel | ≤ 0.25 | 250 | 400–550 | S235JR, SS400, Q235B |
Revision history and superseded standards
| Year | Change |
|---|---|
| 1960 | A36 introduced to replace A7 (33 ksi) |
| 2000s | W-shapes migrate to A992; A36 remains for plate, bar, angle, channel |
| 2019 | A36/A36M-19 — current |
Supersedes: ASTM A7 (withdrawn 1967).
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