... manufacture of tungsten carbide products such as tungsten carbide strips, rods,rings,inserts, shims,, wear parts, drawing dies,drilling bits,cold forging dies,bars, ,balls ... -resistant alloys,gray cast iron,stainless steel,hardened steel(Hardnesssteel glass etc.JGK169460.514.894.33800Ultrafine tungsten carbide powder sintered into a grain ...