P275NL1 boiler and pressure vessel steel grade is one of grades in EN10028-3, which is non alloy and alloy steels with specified elevated temperature properties. EN10028-3 P275NL1 boiler and pressure vessel steel grades are used above all for manufacturing boilers, pressure vessels and pipes transporting hot liquids.
Chemical Composition of EN10028-3 P275NL1 boiler and pressure vessel steel:
| Grade | The Element Max (%) | ||||||
| C | Si | Mn | P | S | Al(min) | N | |
| P275NL1 | 0.16 | 0.40 | 0.5-1.40 | 0.030 | 0.020 | 0.02 | |
| Cr | Cu | Mo | Nb | Ni | Ti | V | |
| 0.30 | 0.30 | 0.08 | 0.005 | 0.50 | 0.03 | 0.05 | |
Carbon Equivalent: Ceq = [C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15] %
Mechanical Property of EN10028-3 P275NL1 boiler and pressure vessel steel:
| Grade | Thickness | Yield | Tensilmie | Elongation | Impact Energy(KV J) min | ||
| P275NL1 | mm | Min Mpa | Mpa | Min % | -20° | 0° | +20° |
| ≤ 16 | 275 | 390-510 | 24 | 47 | 55 | 63 | |
| 16> to ≤35 | 275 | 390-510 | 24 | 47 | 55 | 63 | |
| 35> to ≤50 | 265 | 390-510 | 24 | 47 | 55 | 63 | |
| 50> to ≤70 | 255 | 390-510 | 24 | 47 | 55 | 63 | |
| 70> to ≤100 | 235 | 370-490 | 23 | 47 | 55 | 63 | |
| 100> to ≤150 | 235 | 350-470 | 23 | 47 | 55 | 63 | |
EN10028-3 P275NL1 boiler and pressure vessel steel is a normalized steel plate and sheet. The main difference between the P275NL1 and the P275NL2 grades is the the reduced % of P and S no metallic inclusions allowed in the steel for lower temperature.
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