... :AISI,ASTM,GB,DIN 2.Length:1-6m 3.Certification:ISO 4.Application:tool steel bar Products Exhibition:Detailed Specification of the ... , 420, 430, 430F, 431,416 stainless steel bar2.standard: GB/T 1220-2007,GB/T707-1988,ASTM A 276,A 314, A479, A484,A564 ...