Compare / S355 vs 350W
S355 vs 350W
EN 10025-2:2019 · Steel
Europe's workhorse structural steel: 355 MPa minimum yield up to 16 mm, 470–630 MPa tensile from 3 to 100 mm.
CSA G40.21 · Steel
Canada's standard weldable structural grade: 350 MPa (50 ksi) yield, 450–650 MPa tensile.
ApproximateYield 350 MPa (50 ksi), 5 MPa below S355, and only 46 ksi above 2½ in.; tensile 65–95 ksi. W has no guaranteed impact test; 350WT adds it.
Mechanical
| Property | Condition | S355 | 350W | Difference |
|---|---|---|---|---|
| Yield strength ReH | t = 16 mm | ≥ 355MPa3 | ≥ 350MPa1 | −1.4 % |
| t = 40 mm | ≥ 345MPa3 | ≥ 350MPa1 | +1.4 % | |
| t = 63 mm | ≥ 335MPa2 | ≥ 350MPa1 | +4.5 % | |
| t = 63.5 mm | ≥ 325MPa3 | ≥ 350MPa1 | +7.7 % | |
| t = 80 mm | ≥ 325MPa3 | ≥ 317MPa1 | −2.5 % | |
| t = 100 mm | ≥ 315MPa3 | ≥ 317MPa1 | +0.6 % | |
| t = 101.6 mm | ≥ 295MPa2 | ≥ 317MPa1 | +7.5 % | |
| Tensile strength Rm | t = 3 mm | 510–680MPa3 | 450–655MPa2 | −12 % |
| t = 100 mm | 470–630MPa5 | 450–655MPa2 | −4.3 % | |
| t = 150 mm | 450–600MPa2 | 450–655MPa2 | same | |
| t = 250 mm | 450–600MPa1 | 450–655MPa2 | same | |
| t = 400 mm | 450–600MPa1 | 450–655MPa2 | same |
Rows are matched by condition (thickness band, temperature, product form). A dash means the grade has no sourced value for that condition. Differences are 350W relative to S355; for ranges the lower bound is compared.