S350GD / Equivalents
Is it really S350GD? 2 “equivalents” checked
Cross-reference tables pair grades by name and history. Here each pairing is judged on the minimum values each standard guarantees, with the sources for both sides.
Same strength class; guaranteed values agree within a few MPa. Still check thickness bands and impact quality.
Same class of steel, but at least one guaranteed value is lower or tested differently. Recheck the design.
Commonly listed as an equivalent, but the guaranteed values do not support substitution.
Side by side
| Grade | Standard | Min. yield at 10 mm | Tensile at 10 mm | Match | What differs |
|---|---|---|---|---|---|
| S350GD |  EN 10346:2015 | ≥ 350MPa2 | ≥ 420MPa2 | — | Reference grade. |
| A653 SS Grade 50 Class 1 |  ASTM A653/A653M | ≥ 340MPa2 | ≥ 450MPa1 | Approximate | Yield 340 MPa (50 ksi), 10 MPa lower; tensile 450 MPa (Class 1), higher. Elongation 12 % on 2 in., not comparable with A80. |
| SGC490 |  JIS G 3302 | ≥ 365MPa1 | ≥ 490MPa1 | Approximate | Higher guaranteed yield (365 MPa) and tensile (490 MPa); listed as the JIS counterpart. |