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- weldable normalized fine grained pressure vessel steels
European standard pressure vessel steel P355NH plate
P355NH European standard pressure vessel steel plate is a weldable fine grain steel. P355NH executive standard: EN10028. It belongs to low alloy high strength steel. P355NH plate is widely used in petroleum, chemical, power station, boiler and other industries.
P355NH pressure vessel steel plate chemical composition elements, melting analysis:
| C | Si | Mn | P | S | Ni | Cr | Mo | Cu | Nb | V | Ti | Alt | N |
| ≤0.18 | ≤0.5 | 1.1-1.7 | ≤0.025 | ≤0.015 | ≤0.5 | ≤0.3 | ≤0.08 | ≤0.3 | ≤0.05 | ≤0.1 | ≤0.03 | ≥0.02 | ≤0.012 |
Composition note: Nb+Ti+V≤0.12; Cr+Cu+Mo≤0.45. Ceq = C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15
P355NH steel longitudinal impact, mechanical properties:
P355NH plate delivery status: Normalized.
| Thickness | Mechanical properties | ||
| <5 | ReH(MPa) | ≥355 | |
| Rm(MPa) | 490-630 | ||
| A(%) | ≥22 | ||
| 5-16mm | ReH(MPa) | ≥355 | |
| Rm(MPa) | 490-630 | ||
| A(%) | ≥22 | ||
| Impact temperature | -20 | ||
| Akv(J) | ≥45 | Longitudinal; Transverse: Akv ≥ 30J | |
| >16-40 | ReH(MPa) | ≥345 | |
| Rm(MPa) | 490-630 | ||
| A(%) | ≥22 | ||
| Impact temperature | -20 | ||
| Akv(J) | ≥45 | Longitudinal; Transverse: Akv ≥ 30J | |
| >40-60 | ReH(MPa) | ≥335 | |
| Rm(MPa) | 490-630 | ||
| A(%) | ≥22 | ||
| Impact temperature | -20 | ||
| Akv(J) | ≥45 | Longitudinal; Transverse: Akv ≥ 30J | |
| >60-100 | ReH(MPa) | ≥315 | |
| Rm(MPa) | 470-610 | ||
| A(%) | ≥21 | ||
| Impact temperature | -20 | ||
| Akv(J) | ≥45 | Longitudinal; Transverse: Akv ≥ 30J | |
| >100-150 | ReH(MPa) | ≥305 | |
| Rm(MPa) | 460-600 | ||
| A(%) | ≥21 | ||
| Impact temperature | -20 | ||
| Akv(J) | ≥45 | Longitudinal; Transverse: Akv ≥ 30J | |
| >150-250 | ReH(MPa) | ≥295 | |
| Rm(MPa) | 450-590 | ||
| A(%) | ≥21 | ||
| Impact temperature | -20 | ||
| Akv(J) | ≥45 | Longitudinal; Transverse: Akv ≥ 30J | |
Tensile properties of P355NH plate:
The tensile strength range of P355NH steel plate is Rm630-450MPa. The yield strength is above 355-295MPa (less than or equal to 16 mm). The elongation after fracture is 21-22%.