The table below compares European and American Standards for commonly used stainless steels. It is intended to give comparisons only; these may not represent direct equivalents.
| European standards | USA standards |
|---|
| Steel name |
Steel number |
AISI |
UNS |
| X10CrN18-8 |
1.4310 |
301 |
S30100 |
| X8CrNi18-9 |
1.4305 |
303 |
S30300 |
| X5CrNi18-10 |
1.4301 |
304 |
S30400 |
| X2CrNi19-11 |
1.4306 |
304L |
S30403 |
| X6CrNi25-20 |
1.4951 |
310 |
S31000 |
| X5CrNiMo17-12-2 |
1.4401 |
316 |
S31600 |
| X2CrNiMo17-12-2 |
1.4404 |
316L |
S31603 |
| X2CrNiMo18-15-4 |
1.4438 |
317 |
S31700 |
| X6CrNiMoNb17-12-2 |
1.4580 |
316Cb |
S31640 |
| X6CrNiMoTi17-12-2 |
1.4571 |
316Ti |
S31635 |
| X6CrNiTi18-10 |
1.4541 |
321 |
S32100 |
| X6CrNiNb18-10 |
1.4550 |
347 |
S34700 |
| X6Cr13 |
1.4000 |
410S |
S41008 |
| X6CrAl13 |
1.4002 |
405 |
S40500 |
| X2CrTi12 |
1.4512 |
409 |
S40900 |
| X12Cr13 |
1.4006 |
410 |
S41000 |
| X12CrS13 |
1.4005 |
416 |
S41600 |
| X20Cr13 |
1.4021 |
420 |
S42000 |
| X6Cr17 |
1.4016 |
430 |
S43000 |
| X17CrNi16-2 |
1.4057 |
431 |
S43100 |
| X2CrNiN23-4 |
1.4362 |
(2304) ! |
S32304 |
| X2CrNiMoN22-5-3 |
1.4462 |
(2205) ! |
S31803 |
Specification according to BS EN 10088-1:2005, except for X6CrNi19-11 (1.4951), which is specified according to BS EN 10028-7:2007
!Entries in parentheses are common names, not true AISI designations
Further information
What are the equivalent European and American Standards for common stainless steel filler materials?
Welding of austenitic stainless steels - a guide to best practice
Fabrication with low cost stainless steels - a guide to best practice
Arc welding duplex stainless steels - a guide to best practice