EN 10088-3 — Stainless steels. Part 3: Technical delivery conditions for semi-finished products, bars, rods, wire, sections and bright products
Last updated
Scope
Long products of stainless steel: bar, rod, wire, sections and bright (cold-drawn, peeled, ground) products in the same grade families as Part 2, including free-machining 1.4305 and 1.4570, precipitation-hardening 1.4542/1.4545 with +P conditions, and martensitic 1.4006/1.4021/1.4057 with +QT classes.
Grades covered by EN 10088-3
| Grade | No. | Type | C % | Yield MPa | Tensile MPa | Nearest equivalents |
|---|---|---|---|---|---|---|
| 1.4305 | 1.4305 | Austenitic free-machining stainless steel (sulphur-bearing) | ≤ 0.1 | ≥ 190 | 500–750 | 303, SUS303, Y12Cr18Ni9 |
Revision history and superseded standards
| Year | Change |
|---|---|
| 1995 | First edition |
| 2005 | Revision |
| 2014 | EN 10088-3:2014 — current |
Supersedes: DIN 17440 (long products); BS 970 Part 1 (stainless); EN 10088-3:2005.
Where to buy the standard
The full text is copyrighted by CEN and is not reproduced here. Purchase the current edition from CEN 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
The same alloys, a different mechanical table
Part 3 covers stainless bar, rod, wire, sections and bright products. The grades are those of part 1 — 1.4301, 1.4404, 1.4305, 1.4462 — but the guaranteed mechanical minimums are lower than in part 2, because a 150 mm bar cannot be solution annealed and quenched as effectively as 2 mm strip.
1.4301 guarantees 190 MPa proof stress as bar under part 3 against 230 MPa as cold-rolled strip under part 2. Applying a flat-product figure to a machined shaft overstates the material by roughly 20 %, and the mistake is easy because the grade name is identical in both documents.
Free-machining grades live here and nowhere else
1.4305 — X8CrNiS18-9, the grade sold as 303 — appears in part 3 and not in part 2, and the reason is its sulphur. Sulphur additions form manganese sulphide inclusions that break the chip and transform machinability; they also open pitting sites and ruin weldability.
So 303 exists as bar, for turned parts that are neither welded nor exposed to chlorides, and does not exist as sheet, because a free-machining sheet would be useless. Where a machined part must also resist corrosion, 1.4301 or 1.4404 is the grade and the machine shop absorbs the penalty.