WIDIA™ Victory™ • High-Performance Inserts Cast Iron • Grey and Ductile Irons Step 2 • Select the grade (continued) Negative Insert Geometry Positive Insert Geometry cutting condition -FF -ML -UR ..MA -FP -MU -MP heavily interrupted cut WK20CT WK20CT WK20CT WK20CT WK20CT WK20CT WK20CT lightly interrupted cut WK20CT WK20CT WK20CT WK20CT WK20CT WK20CT WK20CT varying depth of cut,casting, or forging skin WK20CT WK05CT WK20CT WK05CT WK20CT WK20CT WK20CT WK20CT/ smooth cut, pre-turned surface WK20CT WK05CT WS10PT WK05CT WK20CT WK05CT/ WK20CT WS10PT Step 3 • Select the cutting speed Grey Cast Iron speed — m/min Starting Conditions material group grade 60 180 305 430 550 675 800 920 1040 1160 m/min WK05CT 450 K1 WK20CT 300 Ductile, Compacted Graphite, and Malleable Cast Irons (<600 MPa tensile strength) speed — m/min Starting Conditions material group grade 90 135 180 225 275 320 360 410 460 500 m/min WS10PT 200 K2 WK05CT 360 WK20CT 240 Ductile, Malleable, and Austempered Cast Irons (>600 MPa tensile strength) speed — m/min Starting Conditions material group grade 90 135 180 225 275 320 360 410 460 500 m/min WS10PT 150 K3 WK05CT 240 WK20CT 210 widia.com B15