ASTM A612 steel plates are carbon-manganese-silicon steel plates and are intended for welded pressure vessels for service at moderate and lower temperatures. According to ASTM A612/A612M standard, the maximum thickness of ASTM A612 carbon-manganese-silicon steel plates is 1 in., i.e. 25 mm.
ASTM A612 carbon-manganese-silicon steel plates chemical composition:
| Carbon max. | 0.25% |
| Manganese | 1.00-1.50% |
| Phosphorus max. | 0.03% |
| Sulfur max. | 0.03% |
| Silicon | 0.15-0.50% |
| Copper max. | 0.35% |
| Nickel max. | 0.25% |
| Chromium max. | 0.25% |
| Molybdenum max. | 0.08% |
| Vanadium max. | 0.08% |
ASTM A612 carbon-manganese-silicon steel plates shall be generally supplied in rolling condition, and it can also be ordered normalized or stress relieved state or normalized plus stress relieved. Tensile strength of ASTM A612 carbon-manganese-silicon steel plates is greater than 81-105ksi, i.e. 560-725MPa, and yield strength of ASTM A612 steel plates is 50ksi min., i.e. 345MPa.
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