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Material Name: 60Si2Mn, implementation of standards: GB / T 1222-2007 [1]. 60Si2Mn alloy spring steel is widely used silicon-manganese spring steel, strength, flexibility and higher hardenability than 55Si2Mn. 60Si2Mn alloy spring steel suitable for rolling stock, bear a greater load of flat springs or diameter 30mm below the coil spring automobile and tractor industry, the leaf spring is also suitable for the production of non-corrosive medium temperature below 250 ℃ of heat spring and alternating load and work under high stress the important roll of large springs.