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  1. tgreenwood

    Different types of 316L i.e 1.4435 vs 1.4404

    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...

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