... , 60Si2Mn ,55CrMnA ,60CrMnA ,50CrVA, 60CrMnBA,55SiMnVBA , 60Si2CrA spring steel barWe are making the spring flat steel bar all the time ,the detail information is ... and two side straightness, high efficiency, material is cutting plate, hot plate instead of ideal products. And our company has gained wide ...