... , 321,400Series - 410 (1Cr13),420(2Cr13),430(1Cr17) Shape: Round ,Hex square,angle,flat,SquareStandard: ASTM ,EN10272,JIS4303,JIS G-4311,AISI ... form 50mm~8000mmDiameter Size:Hot rolled round bar,it is from 5.5mm~ 100mm Cold forged round bar, It is from 100mm~260mm Grinding ... round bar, It is from 1.0mm~50mm Turn smooth bar, It is from 20mm~220mm Hex square bar, It is form 2.5mm~10mm Square bar ...