20CrNi2Mo/1.5919 / 18CrNi6/15CrNi6/14CrNi6/AISI 4320/16 NC 6 /16NC4 1.Dia 10mm-1200mm 2.Black, Peeled, ... Turned ~~~ 20CrNi2Mo/1.5919 / 18CrNi6/15CrNi6/14CrNi6/AISI 4320/16 NC 6 /16NC4APPLICATIONS:Cutting tools, stamping, woodworking, drawing, deep drawing ... USA ASTM / AISI 4320 SAE4320HRussia GOST 12ChN2 France AFNOR 16 NC 6 /16NC4 Italy UNI 16CrNi4 / 16NiCr4PbJapan SNCM420 Chemical Composition (%): ...