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20MnHR steel plate belongs to normalized pressure vessel steel plate, which has excellent strength and toughness and welding performance.
Chemical composition of 20MnHR steel plate:
| Grade | C | Si | Mn | Mo | Cr | Cu |
| 20MnHR | ≤0.20 | 0.20-0.50 | 1.00-1.60 | ≤0.15 | ≤0.25 | ≤0.28 |
| Cu+6Sn | Nb | V | Ni | P | S | - |
| ≤0.33 | ≤0.040 | ≤0.050 | ≤0.30 | ≤0.015 | ≤0.012 | - |
Analysis of mechanical properties of 20MnHR steel plate:
| Thickness | Yield strength MPa | Tensile strength MPa | Elongation % | Bend test (d=25 ) 180° | Impact test 0°C,J | -20°C, J |
| >6-16 | 355 | 510-640 | 21 | d=3a | 34 | 21 |
| >16-40 | 345 | 490-620 | 21 | d=3a | 34 | 21 |
The operating temperature of 20MnHR steel plate ranges from room temperature to -20℃, and the plate is mainly used to manufacture high-parameter pressure vessels.
