Material number 1.0244: S280GD
1.0244 is the European material number (Werkstoffnummer, EN 10027-2) for S280GD, hot-dip coated structural steel, guaranteed 280 MPa yield — the purlin grade specified in EN 10346.
What 1.0244 means
EN 10027-2 material numbers have the form 1.XXYY: the leading 1 is steel; the next two digits give the steel group (02 → other structural steels); 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 1.0244 has stayed constant while the symbolic name moved from FeE280G to S280GD.
S280GD at a glance
S280GD is the grade most European purlin and light-gauge framing lines run on: a hot-dip galvanized structural sheet with a guaranteed 280 MPa yield and 360 MPa tensile that still bends and roll-forms cleanly at 18 % elongation. Werkstoff number 1.0244; ordered as S280GD+Z275 for enclosed buildings, +Z350 or +ZM120 where the frame is exposed or in humid climates, and as the substrate under pre-painted purlins.
Within EN 10346 it sits between S250GD (light purlins, cable trays) and S320GD/S350GD (deck, long spans, racking). Compared with the forming grade DX51D there is no formability loss that matters for open profiles, but the guaranteed yield lets the designer use EN 1993-1-3 section tables instead of a conservative assumption.
ASTM A653 SS Grade 40 and JIS SGC400 are the working equivalents; span tables published by purlin manufacturers in the Gulf and Africa are commonly based on S280GD or S350GD.
Full data sheet for S280GD → · Equivalent grades →