I'm running GT 4.0.3c, IC 158 along with other mods ([1.6.2] StoneLegion.Com Minecraft Modded Server, With GregTech and much much more!). I had this problem earlier as well with GT 4.0.3b and IC 155.
Since NEI plugins is not fully up to date, I'm not sure how to get stainless steel for the industrial centrifuge/industrial grinder. I have iron, nickel and chrome dust, but the only 2 ways I've found of getting manganese dust involve the 2 machines I can't craft because I don't have it yet.
- Red garnet dust in an industrial centrifuge
- Tungstate ore in an industrial grinder