unclesyd,
Thanks for the information. The limit on ferrite makes sense. In pharma/biotec grade tanks and fittings it seems that the 1.4435 is going to be less likely to corode and is therefore a better material for many applications than the 1.4404. I am surprised that it isn't specified...
Could someone please explain the difference of what appears to be two different subtypes of 316L S/S. (DIN 1.4435 and DIN 1.4404) Also, does BPE subgroup of ASME recognize DIN 1.4435 as a Pharmaceutical or Biotech grade? Would a problem occur if a 1.4404 fitting was unknowingly welded to a...