... advantages than YG6X.For the semi-fine machining of hard cast-iron & ferrous metal and alloy.YG614.6 ... is a little worse than YG15.For heavy rock drill bits.YG1513.9-14.187The strength is higher than ... hardness at high temperature, is a kind of universal hard metal.For machining abrasion resisting steel, manganese steel, ... , manganese steel, stainless-steel, high-grade steel. hard metal wear resistance