S350GD equivalent grades: ASTM, EN, JIS, GB, DIN
S350GD is hot-dip coated structural steel, guaranteed 350 MPa yield — deck and long-span profiles specified in EN 10346. Every grade in the database that can stand in for it is listed below, drawn from 5 standard systems, each with the reason it does or does not match exactly. The full S350GD data sheet carries the composition and mechanical tables.
Last updated
S350GD is cross-certified with S350GD+Z: the composition windows overlap closely enough that one certificate satisfies the other. A single clause separates SS Grade 50 (A653), S280GD, S390GD and 2 more: differ either a test temperature or a composition bound that the other does not. Functionally interchangeable, S355JR, S250GD serve a different route to the same duty — check the design, not the analysis. The cross-reference below covers 1 in GB/T (China), 1 in ASTM / ASME, 4 in EN (European), 1 in IS (India), 1 in JIS (Japan).
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, near and functional are defined once on the grade index; the reason column below says which limit differs in each case.
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.