High-Performance Inserts Widia Steel Carbon, Alloy, and Tool Steels up to 450 HB (48 HRC) Step 3 Select the cutting speed Low-Carbon (<0 3% C) and

High-Performance Inserts Widia Steel Carbon, Alloy, and Tool Steels up to 450 HB (48 HRC) Step 3 Select the cutting speed Low-Carbon (<0.3% C) and Free-Machining Steel speed m/min Starting Conditions material group grade 135 180 225 275 320 360 410 455 495 m/min P0/P1 WP15CT 395 WP25CT 275 WP35CT <1> 210 WS10PT 280 WM35CT 280 Medium- and High-Carbon Steels (<0.3% C) speed m/min Starting Conditions material group grade 135 180 225 275 320 360 410 455 495 m/min WP15CT <1> 265 WP25CT 195 P2 WP35CT 150 WS10PT 200 WM35CT 200 Alloy Steels and Tool Steels (s330 HB) (s35 HRC) speed m/min Starting Conditions material group grade 135 180 225 275 320 360 410 455 495 m/min WP15CT 190 WP25CT <1> 155 P3 WP35CT 120 WS10PT <1> 155 WM35CT 155 Alloy steels and Tool Steels (340-450 HB) (36-48 HRC) speed m/min Starting Conditions material group grade 60 90 120 150 180 210 240 270 300 m/min P4 WP15CT 145 WP25CT <1> 105 WP35CT 95 WS10PT 110 WM35CT 110 Ferritic, Martensitic, and PH Stainless Steels (s330 HB) (s35 HB) speed m/min Starting Conditions material group grade 120 150 180 210 240 270 300 330 360 m/min P5 WP15CT 215 WP25CT 195 WP35CT <5> 135 WS10PT <1> 200 Ferritic, Martensitic, and PH Stainless Steels (340-450 HB) (36-48 HRC) speed m/min Starting Conditions material group grade 105 135 165 195 225 255 285 315 345 m/min P6 WP15CT 180 WP25CT <1> 150 WP35CT <5> 105 WS10PT 150 Widia Victory