... toughness is the worstFor the drawing of cast-iron and fine wire, and the wear-resistance is ... wear-resistance, but lower than YG3X.For cast-iron, rough turning of threads, spiral turning and coarse ... manganese steel, stainless-steel, plain steel and cast-iron.YW212.4-13.590.5Having a higher strength, ... resisting steel, manganese steel, stainless-steel, high-grade steel. High quality cemented carbide