welding disc used in seam welding machine. has passed the authentication of ISO9001 and ISO5182. ... disc:1. also named as welding wheel2. mainly used in seam welding3. material : CuCrZr(C18150),CuCr(C18200),CuZr(C15000),CuBeNi(C17510 ... many countries all over the world welding disc used in seam welding machine