A202 Grade A Pressure Steel Plate refers to a specific type of Chromium-Manganese-Silicon (Cr-Mn-Si) alloy steel plate covered by the ASTM A202 standard, primarily used for welded boilers and pressure vessels in the oil, gas, and general construction industries, known for its suitability for high-temperature, high-pressure applications, though the standard itself was withdrawn in 2004 due to limited use. It's characterized by specific chemical limits (like Cle 0.17%, Mn 1.05-1.40%, Si 0.65-0.90%) and mechanical properties, offering good strength and toughness.
ASTM A202 Grade A(A202GRA)
| Grade | Chemical Composition(%) | ||||
| C | Mn≥ | Si | P | S | |
| A202 Grade A (A202GRA) | 0.17 | 0.97-1.52 | 0.54-0.96 | 0.035 | 0.035 |
| Grade | Mechanical Property | ||||
| Tensile Strength(MPa) | Yield Strength(MPa) | % Elongation in 2 in.(50mm) min | Impacting Test Temperature(°C) | ||
| A202 Grade A (A202GRA)> | 515-655 | 310 | 19 | -20,40,-60 | |
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