P – Stahl, P4Materialklassifizierung:
1.4006 (X12Cr13, X10Cr13)1.4034 (X46Cr13)1.4057 (X19CrNi17-2)1.4510 (X3CrTi17)1.4542 (X5CrNiCuNb16-4)1.4747 (X80CrNiSi20)