Standard: ASTM A240 / A312 · EN 10088-1 · JIS G4304 · GB/T 20878
The same stainless steel goes by different names in each system. This table lists the nearest equivalents for the grades traded most often. "Equivalent" means close, not identical: carbon, nitrogen and nickel limits differ slightly between standards, so a material certified to one standard is not automatically certified to another. Dual-certified material (for example 304/304L, or 316/316L to ASTM and EN 1.4401/1.4404) is common and should be asked for when a project names two systems.
| AISI / ASTM type | UNS | EN number | EN name | JIS | GB (China) | Family |
|---|---|---|---|---|---|---|
| 201 | S20100 | 1.4372 | X12CrMnNiN17-7-5 | SUS201 | 12Cr17Mn6Ni5N | Austenitic (Cr-Mn) |
| 301 | S30100 | 1.4310 | X10CrNi18-8 | SUS301 | 12Cr17Ni7 | Austenitic |
| 303 | S30300 | 1.4305 | X8CrNiS18-9 | SUS303 | Y12Cr18Ni9 | Austenitic, free-machining |
| 304 | S30400 | 1.4301 | X5CrNi18-10 | SUS304 | 06Cr19Ni10 | Austenitic |
| 304L | S30403 | 1.4307 | X2CrNi18-9 | SUS304L | 022Cr19Ni10 | Austenitic, low carbon |
| 304H | S30409 | 1.4948 | X6CrNi18-10 | – | 07Cr19Ni10 | Austenitic, high carbon (creep) |
| 309S | S30908 | 1.4833 | X12CrNi23-13 | SUS309S | 06Cr23Ni13 | Austenitic, heat resisting |
| 310S | S31008 | 1.4845 | X8CrNi25-21 | SUS310S | 06Cr25Ni20 | Austenitic, heat resisting |
| 316 | S31600 | 1.4401 | X5CrNiMo17-12-2 | SUS316 | 06Cr17Ni12Mo2 | Austenitic, molybdenum |
| 316L | S31603 | 1.4404 | X2CrNiMo17-12-2 | SUS316L | 022Cr17Ni12Mo2 | Austenitic, molybdenum, low carbon |
| 316Ti | S31635 | 1.4571 | X6CrNiMoTi17-12-2 | SUS316Ti | 06Cr17Ni12Mo2Ti | Austenitic, titanium stabilised |
| 317L | S31703 | 1.4438 | X2CrNiMo18-15-4 | SUS317L | 022Cr19Ni13Mo3 | Austenitic, higher molybdenum |
| 321 | S32100 | 1.4541 | X6CrNiTi18-10 | SUS321 | 06Cr18Ni11Ti | Austenitic, titanium stabilised |
| 347 | S34700 | 1.4550 | X6CrNiNb18-10 | SUS347 | 06Cr18Ni11Nb | Austenitic, niobium stabilised |
| 904L | N08904 | 1.4539 | X1NiCrMoCu25-20-5 | SUS890L | 015Cr21Ni26Mo5Cu2 | Super-austenitic |
| 409L | S40910 | 1.4512 | X2CrTi12 | SUH409L | 022Cr11Ti | Ferritic |
| 410 | S41000 | 1.4006 | X12Cr13 | SUS410 | 12Cr13 | Martensitic |
| 420 | S42000 | 1.4021 | X20Cr13 | SUS420J1 | 20Cr13 | Martensitic |
| 430 | S43000 | 1.4016 | X6Cr17 | SUS430 | 10Cr17 | Ferritic |
| 2304 | S32304 | 1.4362 | X2CrNiN23-4 | – | 022Cr23Ni4MoCuN | Duplex (lean) |
| 2205 | S32205 / S31803 | 1.4462 | X2CrNiMoN22-5-3 | SUS329J3L | 022Cr23Ni5Mo3N | Duplex |
| 2507 | S32750 | 1.4410 | X2CrNiMoN25-7-4 | – | 022Cr25Ni7Mo4N | Super duplex |
| 630 (17-4PH) | S17400 | 1.4542 | X5CrNiCuNb16-4 | SUS630 | 05Cr17Ni4Cu4Nb | Precipitation hardening |
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