S350GD equivalent grades: ASTM, EN, JIS, GB, DIN
Cross-reference for S350GD across standard systems. Each match is graded so you can see how safe the substitution is. Hot-dip coated structural steel, guaranteed 350 MPa yield — deck and long-span profiles — full S350GD data sheet.
Cross-reference table
| Grade | System | Match | Why / differences |
|---|---|---|---|
| S350GD+Z | GB/T (China) | Identical | GB/T 2518 adopts the EN designation (also 350 by yield). |
| SS Grade 50 (A653) | ASTM / ASME | Near | ASTM A653 Structural Steel Grade 50 [340] Class 1: 340 MPa yield, 450 MPa tensile — the US deck and framing grade. |
| S280GD | EN (European) | Near | One class lower — the general purlin grade. |
| S390GD | EN (European) | Near | First micro-alloyed class above S350GD, for heavy racking and structural deck. |
| IS 277 Grade 340 | IS (India) | Near | Indian galvanized sheet, 340 MPa yield. |
| SGC440 | JIS (Japan) | Near | JIS G3302 SGC440: yield ≥ 335 MPa, tensile ≥ 440 MPa, A ≥ 18 %. |
| S355JR | EN (European) | Functional | Uncoated hot-rolled equivalent by yield, for profiles hot-dip galvanized after forming. |
| S250GD | EN (European) | Functional | Same chemistry family, 350 MPa yield; used where span tables require it. |
Identical = same composition and mechanical limits within rounding. Near = one limit differs (e.g. carbon max or impact temperature). Functional = interchangeable for most uses after an engineering check.
How the matches are graded
Identical means the chemical composition windows overlap so that material certified to one specification meets the other without deviation, and the mechanical minimums are the same or the other is inside them — mills usually dual-certify. Near means one limit differs (a carbon maximum, an impact temperature, a strength minimum or a delivery condition) and a substitution needs a one-line engineering check. Functional means the grades serve the same purpose but are not the same steel — a designer can often use one for the other, but only after re-checking the design.
S350GD in GB/T (China)
- S350GD+Z — Identical GB/T 2518 adopts the EN designation (also 350 by yield).
S350GD in ASTM / ASME
- SS Grade 50 (A653) — Near ASTM A653 Structural Steel Grade 50 [340] Class 1: 340 MPa yield, 450 MPa tensile — the US deck and framing grade.
S350GD in EN (European)
- S280GD — Near One class lower — the general purlin grade.
- S390GD — Near First micro-alloyed class above S350GD, for heavy racking and structural deck.
- S355JR — Functional Uncoated hot-rolled equivalent by yield, for profiles hot-dip galvanized after forming.
- S250GD — Functional Same chemistry family, 350 MPa yield; used where span tables require it.
S350GD in IS (India)
- IS 277 Grade 340 — Near Indian galvanized sheet, 340 MPa yield.
S350GD in JIS (Japan)
- SGC440 — Near JIS G3302 SGC440: yield ≥ 335 MPa, tensile ≥ 440 MPa, A ≥ 18 %.
Superseded names for S350GD
- FeE350G — EN 10147:1992: Pre-2000 designation.
- StE350-2Z — DIN 17162 (withdrawn): German structural galvanized grade.
- Z35 — BS 2989: British structural galvanized quality, 35 kgf/mm² ≈ 345 MPa.
Key data for S350GD
Full composition, mechanical properties by thickness, heat treatment and applications for S350GD →
Verified against EN 10346:2015. Last checked: September 2026.