... parts and equipments such as auto spring,motor spring,truck spring,and exported to 30 countries and regions .About ... 60Si2Mn,55CrSi,SAE9254(A),60Si2CrA,55SiMnVB and so on.2.Standard:GB1222,JISG4801,ASTM ,DIN.3 ... hot rolled,cold rolled, oil heat treatment based on your requirements.5.Payment:T/T in advance, ... confirmed L/C or deposit.7.MOQ:15MT each sizes.Meanwhile, we also supply spring steel bar by cold ...