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P500QH steel plate implementation standard: EN10028-6, number: 1.8874, the size, shape and allowable deviation of the steel plate should meet the requirements of 2007+A1:2009 in EN10028-1. P500QH steel plate is weldable fine-grain quenched and tempered steel for pressure equipment, with good plasticity, toughness, cold bending performance and welding performance.
P500QH steel plate chemical composition (finished product analysis):
| C | Si | Mn | P | S | Ni | Cr | Mo | Cu | Nb | V | Ti | N | Zr | B |
| ≤0.18 | ≤0.6 | ≤1.7 | ≤0.025 | ≤0.015 | ≤1.5 | ≤1 | ≤0.7 | ≤0.3 | ≤0.05 | ≤0.08 | ≤0.05 | ≤0.015 | ≤0.15 | ≤0.005 |
Composition Notes: The proportion of grain refining elements should be at least 0.015. Aluminum is also included in these elements, Als≥0.015, Alt≥0.018.
Mechanical properties of P500QH steel plate:
| Delivery Status | Thickness | Mechanical properties | |
| Quenching and tempering | <5mm | ReH(MPa) | ≥500 |
| Rm(MPa) | 590-770 | ||
| A(%) | ≥17 | ||
| 5-50mm | ReH(MPa) | ≥500 | |
| Rm(MPa) | 590-770 | ||
| A(%) | ≥17 | ||
| Impact temperature | -20 | ||
| Akv(J) | ≥27 | ||
| >50-100mm | ReH(MPa) | ≥480 | |
| Rm(MPa) | 590-770 | ||
| A(%) | ≥17 | ||
| Impact temperature | -20 | ||
| Akv(J) | ≥27 | ||
| >100-150mm | ReH(MPa) | ≥440 | |
| Rm(MPa) | 540-720 | ||
| A(%) | ≥17 | ||
| Impact temperature | -20 | ||
| Akv(J) | ≥27 | ||
