seam welding disc: 1. mainly used in seam welding machine 2. material: CuCrZr(C18150), CuCr(C18200),CuZr(C15000),CuNi2SiCr(C18000), CuBeNi(C17510) 3. Produce according to Inernational standard strictly 4. also can produce according to drawings We are a professional factory for electrode material and ready-made products. We have over 27years' history.And this product has been exported to many countries allover the world.