Steels with a chromium content of more than 10,5% and less than 0,15% carbon. Unlike martensitic steels, these grades cannot be stiffened by quench hardening but only through cold working (e.g. Cold drawing). Ferritic steels are ferromagnetic.
| Valbruna Grade | W.N. | AISI | UNS | EN | BS |
|---|---|---|---|---|---|
| VAL1LC | - | - | S40940 | - | - |
| VAL1LCNI | - | - | S40976 | - | - |
| VAL1PT | 1.4512 | 409 | S40900 | X2CrTi12 | - |
| X11L | 1.4003 | - | S41003 | X2CrNi12 / X2Cr11 | - |
| X17AL | 1.4742 | - | - | X10CrAlSi18 / X10CrAl18 | - |
| X17L | 1.4016 | 430 | S43000 | - | 430S11 / 430S18 |
| X17M | 1.4113 | 434 | S43400 | X6CrMo17-1 | 434S20 |
| X17MZ | 1.4105 | 430F | S43020 | X6CrMoS17 | - |
| X17NBL | 1.4511 | - | - | X3CrNb17 | - |
| X17T | 1.4510 | 430Ti | S43036 | X3CrTi17 | - |
| X17Z | - | 430F | S43020 | - | - |
| X17Z/DE | 1.4104 | - | - | X14CrMoS17 | - |
| X182N | 1.4521 | 444 | S44400 | X2CrMoTi18-2 | - |
| X18DZ | - | XM-34 | S18200 | - | - |
| X24AL | 1.4762 | - | - | X10CrAlSi25 / X10CrAl24 | - |
| X25R | - | 446 | S44600 | - | - |
| X7AL | 1.4713 | - | - | X10CrAlSi7 | - |