... flat steel 2.competive price and good product 3.size:1.0*3-80*600mm*L, 4.steel Grade:SUP9,SAE5160,SUP12V,51CrV4 Spring flat steel ... .About products details is as followings.1.Steel grade:SUP9A,SUP11A,55CrSi,SA9254V,50CrVA,SUP7,SUP9 ... and so on.2.Standard:GB1222,JISG4801,ASTM ,DIN.3.Size:1.0*3-80*600mm* ... 15MT each sizes.Meanwhile, we also supply spring steel bar by cold drawn + oil heat treatment, ...