ASTM A573 Grade 65 steel specification covers structural quality carbon-manganese-silicon steel plates in three tensile strength ranges intended primarily for service at atmospheric temperatures where improved notch toughness is important.
ASTM A573 Grade 65 steel plates maximum thickness is 1.5 in. [40 mm].
ASTM A573 Grade 65 material chemical composition:
| Grade | C, max | Mn | P,max | S,max | Si | |
| ≤1/2 in(13mm) | >1/2in-1.5in(13mm-40mm) | |||||
| 65 | 0.24 | 0.26 | 0.85-1.20 | 0.035 | 0.04 | 0.15-0.40 |
ASTM A573 Grade 65 carbon steel mechanical properties
| Grade | Tensile strength,ksi,mpa | Yield strength,ksi,mpa | Elongation,8in(200mm),min,% | Elongation,2in,(50mm),min,% |
| 65 | 65-77(450-530) | 35(240) | 20 | 23 |
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