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CTC5240 CTCS245 80 64 70 56 35 28 25 20 30 24 80 64 50 40 40 32 46 Cutting data standard values The cutting data is strongly influenced by external conditions, such as the stability of the tool and workpiece clamping, material and type of machine. The specified values represent guideline cutting data that can be adjusted by approx. ±20% according to the usage conditions. Cutting Material hard (vc↑) → tough (vc↓) vc (m/min) Milling tools with indexable inserts Cutting Data Material subgroup Index Tensile strength N/mm²* / HB / HRC P Unalloyed steel P.1.1 420 N/mm2 / 125 HB P.1.2 640 N/mm2 / 190 HB P.1.3 840 N/mm2 / 250 HB P.1.4 910 N/mm2 / 270 HB P.1.5 1010 N/mm2 / 300 HB Lowalloy steel P.2.1 610 N/mm2 / 180 HB P.2.2 930 N/mm2 / 275 HB P.2.3 1010 N/mm2 / 300 HB P.2.4 1200 N/mm2 / 375 HB Highalloy steel and highalloy tool steel P.3.1 680 N/mm2 / 200 HB P.3.2 1100 N/mm2 / 300 HB P.3.3 1300 N/mm2 / 400 HB Stainless steel P.4.1 680 N/mm2 / 200 HB P.4.2 1010 N/mm2 / 300 HB M Stainless steel M.1.1 610 N/mm2 / 180 HB M.2.1 300 HB M.3.1 780 N/mm2 / 230 HB K Grey cast iron K.1.1 350 N/mm2 / 180 HB K.1.2 500 N/mm2 / 260 HB Spherulitic graphite cast iron K.2.1 540 N/mm2 / 160 HB K.2.2 845 N/mm2 / 250 HB Malleable iron K.3.1 440 N/mm2 / 130 HB K.3.2 780 N/mm2 / 230 HB N Aluminium wrought alloy N.1.1 60 HB N.1.2 340 N/mm2 / 100 HB Cast aluminium alloy N.2.1 250 N/mm2 / 75 HB N.2.2 300 N/mm2 / 90 HB N.2.3 440 N/mm2 / 130 HB Copper and copper alloys (bronze/brass) N.3.1 375 N/mm2 / 110 HB N.3.2 300 N/mm2 / 90 HB N.3.3 340 N/mm2 / 100 HB Magnesium alloys N.4.1 70 HB S Heatresistant alloys S.1.1 680 N/mm2 / 200 HB S.1.2 950 N/mm2 / 280 HB S.2.1 840 N/mm2 / 250 HB S.2.2 1180 N/mm2 / 350 HB S.2.3 1080 N/mm2 / 320 HB Titanium alloys S.3.1 400 N/mm2 S.3.2 1050 N/mm2 / 320 HB S.3.3 1400 N/mm2 / 410 HB H Hardened steel H.1.1 46–55 HRC H.1.2 56–60 HRC H.1.3 61–65 HRC H.1.4 66–70 HRC Chilled iron H.2.1 400 HB Hardened cast iron H.3.1 55 HRC O Nonmetal materials O.1.1 ≤ 150 N/mm2 O.1.2 ≤ 100 N/mm2 O.2.1 ≤ 1000 N/mm2 O.2.2 ≤ 1000 N/mm2 O.3.1 * Tensile strength