... resistance.Semifinishing of chilled cast iron,non-ferrors metals alloys ,semi-finishing and finishing of havdened steel,alloy steel. GradeEquivalent ... steel. YG8 K20 14.8 ≥89.5 ≥2320High strength, impact and shock resistance, higher than YC6A, but wear resistance and ... etc.the grade as follow cutter is YS2T suply manufactory high quality and cheap cemented carbide circular disc cutters with 100 teeth ...