seam welding wheel: 1. mainly used in seam welding machine 2.material: CuCrZr(C18150), CuZr(C15000),CuCr(C18200), CuBeNi(C17510), CuNi2SiCr(C18000) We have 27years' experience in producing this. And this product has been exported to many countries allover the world.