EN 10219 — Cold formed welded steel structural hollow sections
Last updated
Scope
Cold-formed welded circular, square and rectangular hollow sections for structures: Part 1 technical delivery conditions (S235JRH, S275J0H/J2H, S355J0H/J2H/K2H, S420MH, S460MH, fine-grain and weathering variants), Part 2 tolerances, dimensions and sectional properties. Distinguished from EN 10210 (hot-finished) by lower corner radii tolerance class and cold-forming-related ductility limits.
Grades covered by EN 10219
| Grade | No. | Type | C % | Yield MPa | Tensile MPa | Nearest equivalents |
|---|---|---|---|---|---|---|
| S235JRH | 1.0039 | Non-alloy structural steel for cold-formed (EN 10219) and hot-finished (EN 10210) hollow sections | ≤ 0.17 | 235 | 360–510 | A500 Grade B, STKR400 / STK400, Q235B (GB/T 6728) |
| S355J2H | 1.0576 | Non-alloy structural steel for hollow sections, 355 MPa, −20 °C impact | ≤ 0.22 | 355 | 470–630 | A500 Grade C, A1085, STKR490 / STK490 |
Revision history and superseded standards
| Year | Change |
|---|---|
| 1997 | EN 10219-1/-2:1997 — first edition |
| 2006 | Revision; S420MH/S460MH added |
| 2019 | EN 10219-1/-2:2019 — current; part 3 (high-strength) in preparation |
Supersedes: EN 10219:1997 / 2006; DIN 59411 (cold-formed hollow sections); BS 6363.
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The full text is copyrighted by CEN and is not reproduced here. Purchase the current edition from CEN / national standards body or your national standards body. The values on this site are the normative limits as published; the standard's own tables, notes and test methods govern.
Related standards
Cold-formed is not hot-finished
EN 10219 covers cold-formed welded structural hollow sections; EN 10210 covers hot-finished ones. They look identical on a drawing and differ in three ways that matter.
Cold forming work-hardens the corners, leaving residual stress and reduced ductility exactly where a connection concentrates load. The corner radius is larger — roughly two to three times the wall thickness on the outside — which reduces the real cross-section against a sharp-cornered calculation and matters when a fitting has to sit flat. And the tolerance regime is looser on straightness and squareness.
Hot-finished sections cost substantially more and are specified where the design is fatigue-loaded, heavily restrained, or hot-dip galvanized in thick section.
The H suffix and the mass formula
Grades under this standard carry an H: S235JRH, S355J2H. The chemistry follows EN 10025-2 but the standards are not interchangeable — a section ordered as S355J2 to EN 10025-2 has not been ordered to a hollow-section specification at all.
Mass per metre is calculated with the corner radii rather than as a sharp-cornered box, which is why catalogue values sit 2–4 % below the naive product of dimensions on thin walls. Any comparison between a supplier figure and a calculator should be made on the same basis before a difference is treated as an error.