... , 60Si2Mn ,55CrMnA ,60CrMnA ,50CrVA, 60CrMnBA,55SiMnVBA , 60Si2CrA spring steel barWe are making the spring flat steel bar all the time ,the detail information is ... JIS : SUP7,SUP9,SUP9A,SUP10,SUP11,SUP12 ASTM: 1566 ,9255,9260,5155,5160,6150,51B6,9254 DIN: 55Si7 ,60Si7, 55Cr3, 58CrMnB4 ...