... products are tungsten carbide ring and rollers, strips, blade, drawing dies , heading dies, rods, precision tools and etc, ... 1840≥89 Qualified for rough machining of cast iron, non-ferrous metal, nonmetal materials, drawing of steel, non-ferrous metal and ... rock drilling, steel bars with high compression ratios, pipe drawing, punching tools, core cabinet of powder metallurgy automatic molders etc.YG20 ...