1.material:tungsten carbide 2.our carbide rods suitable for working with gray cast iron, steel alloys and stainless steel etc. Zhuzhou ZZ Hardmetal, which was established in the hometown of hard metal of China --- Zhuzhou city in Hunan province. A professional Chinese manufacturer of tungsten carbide products such as indexable inserts shims, drilling bits, drawing dies, cold forging dies, carbide ...