We purchase raw materials(plate&bar) from ZPSS , TISCO , BAOSTEEL , YONGXING and so on , we have stable supply and reliable quality , each chemical component , mechanicalproperty , dimensional tolerance all accord with ASTMand GB standard request.We recheck each Heat number raw material before into the factory , the inspection including:Chemical component analysis , mechanical test and intergranular corrosion test and so on. After our Testing Center issue the |