By Country: Whole China USA Germany Japan UK France Russia Sweden Korea International Italy Spain Poland European By Standard: Whole GB YB JB AISI UNS SAE ASTM AMS ASME MIL AWS FED DIN JIS AFNOR KS B.S. SS UNI ISO EN CNS GOST International UNE NKK GB/T YB/T PN SEW WL By Structure: Whole Austenite Austenitic-Ferritic(Duplex steel) Ferrite Cementite Pearlite Martensite Precipitation-Hardening Ferrite-Pearlitic Pearlitic Bainite Martensite-Ferrite Austenitic-Martensite AMS C300,300,K93120,1.6358,1.6354 AMS C250, 250, UNS K92890, 1.6359, Alloy 250