Material number 1.0529: S350GD
1.0529 is the European material number (Werkstoffnummer, EN 10027-2) for S350GD, hot-dip coated structural steel, guaranteed 350 MPa yield — deck and long-span profiles specified in EN 10346.
What 1.0529 means
EN 10027-2 material numbers have the form 1.XXYY: the leading 1 is steel; the next two digits give the steel group (05 → steels 0.25–0.55 % C or Rm 500–700 MPa); the last two digits are a sequential number within that group. The number is unique to one composition and survives name changes, which is why 1.0529 has stayed constant while the symbolic name moved from FeE350G to S350GD.
S350GD at a glance
S350GD is the structural galvanized grade for members that are designed to their limit: composite floor deck, long-span roof deck, heavy-duty purlins, pallet-racking uprights, highway guardrail and solar trackers. EN 10346 guarantees 350 MPa yield and 420 MPa tensile at 16 % elongation; Werkstoff number 1.0529. Ordered as S350GD+Z275 (Z350–Z600 or +ZM for exposed frames) and, for deck, usually with a surface quality B and a minimized spangle so the concrete-side embossing is uniform.
It is the top of the plain carbon-manganese structural class in EN 10346 — S390GD and above are micro-alloyed — and roughly 20 % stronger than S280GD from the same section, which is why deck manufacturers publish their span tables on S350GD. Ductility is lower (16 %); bend radii on deck ribs and racking hooks are sized accordingly.
ASTM A653 SS Grade 50 Class 1 and JIS SGC440 are the equivalents used in North American and Asian deck catalogues.
Full data sheet for S350GD → · Equivalent grades →