... , E; A53(A, B); A106(B, C); A178... composition (%):Standard Steel grade CSiMnP≤S≤Cu≤Ni≤Cr≤GB/T 8162100.07 ... .4--Remark: We can also provide customers with ERW pipe, steel pipe, line pipe, casing pipe, high pressure boiler pipe, MID ... to contact us. And you are also invited to Tianjn for business tour. Welded stainless steel tubes for machine structures