... 65Mn, SUP9, SUP7, 55CR3, 50CRV4, SAE5160, SAspring steel flat barOur main distribution Nanjing, Xing Cheng, Daye and other manufacturers ... spring flat steel, the material is complete, complete specifications, the quality ... T 1222-1984 Our company can offer Xingcheng spring steel, flat steel spring and spring mainly round spot.Common specifications have ...