P355M Pressure Vessel Steel is an alloy steel formulated for primary forming into wrought products. Cited properties are appropriate for the thermomechanically rolled condition. P355M Pressure Vessel Steel is the EN numeric designation for this material.
P355M Pressure Vessel Steel is the EN chemical designation.
It has a moderately high thermal conductivity and a very low tensile strength among EN wrought alloy steels.
Chemical composition % of steel P355M Pressure Vessel Steel (1.8821): EN 10028-5-2003
| Main chemical elements composition of P355M steel plate | ||||||
| C | Si | Mn | P | S | Al (total) | N |
| 0.14 | 0.50 | 1.60 | 0.025 | 0.020 | ≥0.020 | 0.015 |
| Mo | Nb | Ni | Ti | V | Cr+Cu+Mo | |
| 0.20 | 0.05 | 0.50 | 0.05 | 0.10 | 0.60 | |
Mechnical property for P355M steel plate:
| Thickness(mm) | Yield strength (≥Mpa) | Tensile strength (Mpa) | Elongation in ≥,% |
| T≤16 | 355 | 450-610 | 22 |
| 16<T≤40 | 355 | ||
| 40<T | 345 |
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