Compare / Q355 vs S355
Q355 vs S355
GB/T 1591-2018 · Steel
China's S355 counterpart, which replaced Q345 in GB/T 1591-2018. Q355B/C/D test 34 J at +20/0/−20 °C.
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.
Close matchChina's direct counterpart since GB/T 1591-2018 renamed Q345 to Q355. Q355B/C/D test 34 J where S355JR/J0/J2 test 27 J; thickness bands and chemistry differ.
Mechanical
| Property | Condition | Q355 | S355 | Difference |
|---|---|---|---|---|
| Yield strength ReH | t = 16 mm | ≥ 355MPa1 | ≥ 355MPa3 | 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 S355 relative to Q355; for ranges the lower bound is compared.