SA203 steel plate belongs to nickel-based low-temperature steel for pressure vessels, and implements American ASME standard. SA203 series steel plate has five grades: A, B, D, E, F.
Maximum thickness limit of SA203 steel plate:
| Grade | Maximum Thickness, in. (mm) |
| A | 6(150) |
| B | 6(150) |
| D | 4(100) |
| E | 4(100) |
| F | 4(100) |
Tensile strength of SA203 steel plate:
| Thickness | Grade A and D ksi(MPa) |
Grade B and E ksi(MPa) |
Grade F ksi(MPa) |
|
| Tensile strength | ≤2in.(50mm) | 65-85(450-585) | 70-90(485-620) | 80-100(550-690) |
| >2in.(50mm) | 65-85(450-585) | 70-90(485-620) | 75-95(515-655) | |
| Yield strength, ≥ | ≤2in.(50mm) | 37(255) | 40(275) | 55(380) |
| >2in.(50mm) | 37(255) | 40(275) | 50(345) | |
| Elongation, gauge distance 8in.(200mm), ≥, % | 19 | 17 | - | |
| Elongation, gauge distance 2in.(50mm), ≥, % | 23 | 21 | 20 | |
SA203 steel plates have good impact toughness and mechanical properties under low temperature conditions, and are usually used in low temperature environments of -70 to -101 (the quenched and tempered state can reach -107).
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