DIN 17100 — General structural steels; quality specifications (withdrawn)
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Scope
The German standard for general structural steels St33, St37-2, USt37-2, RSt37-2, St37-3, St44-2, St44-3, St52-3 and the machinery grades St50-2, St60-2, St70-2. Withdrawn in 1994 when EN 10025 was adopted, but the St37/St52 names remain in daily use worldwide. This page maps every DIN 17100 grade to its EN 10025-2 successor.
Grades covered by DIN 17100
| Grade | No. | Type | C % | Yield MPa | Tensile MPa | Nearest equivalents |
|---|---|---|---|---|---|---|
| St 22 | 1.0332 | Withdrawn DIN designation for hot-rolled mild steel sheet for cold forming | ≤ 0.12 | ≈ 240 | 340–420 | DD11, SPHC, A1011 CS Type B |
| St37-2 | 1.0037 | General structural steel (DIN 17100, withdrawn) — today S235JR | ≤ 0.17 | 235 | 340–470 | S235JR, A36, SS400 |
| St52-3 | 1.0570 | General structural steel (DIN 17100, withdrawn) — today S355J2 / S355JR | ≤ 0.2 | 355 | 490–630 | S355J2, S355JR, A572 Gr. 50 |
Grade mapping to the successor standard
| DIN 17100 grade | Current EN grade |
|---|---|
| St33 | S185 (1.0035) |
| USt37-2 (1.0036) | S235JRG1 — deleted 2004 |
| St37-2 (1.0037) | S235JR (1.0038) |
| RSt37-2 (1.0038) | S235JRG2 → S235JR (1.0038) |
| St37-3 U (1.0114) | S235J0 (1.0114) |
| St37-3 N (1.0116) | S235J2G3 → S235J2 (1.0117) |
| St44-2 (1.0044) | S275JR (1.0044) |
| St44-3 U (1.0143) | S275J0 (1.0143) |
| St44-3 N (1.0144) | S275J2G3 → S275J2 (1.0145) |
| St52-3 U (1.0553) | S355J0 (1.0553) |
| St52-3 N (1.0570) | S355J2G3 → S355J2 (1.0577) |
| St50-2 (1.0050) | E295 (1.0050) |
| St60-2 (1.0060) | E335 (1.0060) |
| St70-2 (1.0070) | E360 (1.0070) |
Revision history and superseded standards
| Year | Change |
|---|---|
| 1957 | DIN 17100 first edition (St 37, St 42, St 52 …) |
| 1966 | Revision |
| 1980 | DIN 17100:1980 — last edition (St37-2, RSt37-2, St52-3 N …) |
| 1994 | Withdrawn; replaced by EN 10025:1993 (DIN EN 10025) |
Supersedes: DIN 17100:1966.
Withdrawn. This standard has been replaced by EN 10025-2; the grade names above are given for translating legacy drawings.
Where to buy the standard
The full text is copyrighted by DIN and is not reproduced here. Purchase the current edition from Beuth (historical document only) or your national standards body.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
Withdrawn, and still on every second drawing
DIN 17100 was the German structural steel standard until EN 10025 replaced it, and it has been formally withdrawn for decades. Its grade names — St 37-2, St 44-2, St 52-3 — remain in daily use across German-speaking industry, on legacy drawings, in workshop conversation and in supplier catalogues.
The number is the minimum tensile strength in kgf/mm², not the yield: St 52 means 52 kgf/mm², about 510 MPa tensile. Reading it as a yield figure overstates the steel by roughly 45 %, which is the single commonest error when an old German drawing meets a modern specification.
The suffix is the quality group
The trailing digit graded the quality. -1 had no impact requirement and no weldability guarantee. -2 was the ordinary commercial quality. -3 added an impact test, with U and N variants for untreated and normalised delivery.
That ladder maps onto the modern letters, but not evenly: St 37-2 corresponds to S235JR, and St 52-3 corresponds to S355J2 or S355J0 — not to S355JR, because the -3 suffix carried a guaranteed Charpy result that JR does not. Quoting S355JR against an St 52-3 drawing silently drops the toughness requirement.