HRC30-45 Train wheel hub machining steel for roughing LNUX191940, LNUX301940 LNUX191940, LNUX301940 turning insert is well applied to workpiece steel, hardness workpiece is HRC30-45, beside, it be alternative of  semi-finishing, rough machining. Coating color: Yellow, Blackish. Standard size specification CVD Coating Hardness HRC30-45, Application Scope- Steel, Stainless steel Steel P20-40,             ISO Items Dimensions(mm) Grade …