We can manufacture different sizes spring steel plate. Steel grade:SUP11A 60Si2Mn,65Si7,SUP9,SUP9A,SAE5160H,50CrVA,SAE615. Spring steel plates and Spring round bar 1),Steel grade:60Si2Mn,65Si7,SUP9,SUP9A,SUP11A SAE5160H,50CrVA,SAE6150H.2),65Mn:roundφ12φ50 flat45×5120×12 60×1390×20 Spring steel GB1222JIS G48013),SUP10roundφ12φ50 flat45×5120×12 60×1390×20 Spring steel GB1222JIS G4801 4),SUP9(A) ...