... ,55CrMnA ,60CrMnA ,50CrVA, 60CrMnBA,55SiMnVBA , 60Si2CrA spring steel barWe are making the spring flat steel bar all the time ,the detail information ... ,6150,51B6,9254 DIN: 55Si7 ,60Si7, 55Cr3, 58CrMnB4 ,50CrV42, SIZE: thick: 5-90 mm width : 40-250mm length : 3-12M3, payment ... our efforts,our coperation will expand even in future. spring steel bar