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13 Material subgroup Index Tensile strength Nmm²* HB HRC P Unalloyed steel P 1 1 420 Nmm 2 125 HB P 1 2 640 Nmm 2 190 HB P 1 3 840 Nmm 2 250 HB P 1 4 910 Nmm 2 270 HB P 1 5 1010 Nmm 2 300 HB Lowalloy steel P 2 1 610 Nmm 2 180 HB P 2 2 930 Nmm 2 275 HB P 2 3 1010 Nmm 2 300 HB P 2 4 1200 Nmm 2 375 HB Highalloy steel and highalloy tool steel P 3 1 680 Nmm 2 200 HB P 3 2 1100 Nmm 2 300 HB P 3 3 1300 Nmm 2 400 HB Stainless steel P 4 1 680 Nmm 2 200 HB P 4 2 1010 Nmm 2 300 HB M Stainless steel M 1 1 610 Nmm 2 180 HB M 2 1 300 HB M 3 1 780 Nmm 2 230 HB K Grey cast iron K 1 1 350 Nmm 2 180 HB K 1 2 500 Nmm 2 260 HB Spherulitic graphite cast iron K 2 1 540 Nmm 2 160 HB K 2 2 845 Nmm 2 250 HB Malleable iron K 3 1 440 Nmm 2 130 HB K 3 2 780 Nmm 2 230 HB N Aluminium wrought alloy N 1 1 60 HB N 1 2 340 Nmm 2 100 HB Cast aluminium alloy N 2 1 250 Nmm 2 75 HB N 2 2 300 Nmm 2 90 HB N 2 3 440 Nmm 2 130 HB Copper and copper alloys bronze brass N 3 1 375 Nmm 2 110 HB N 3 2 300 Nmm 2 90 HB N 3 3 340 Nmm 2 100 HB Magnesium alloys N 4 1 70 HB S Heatresistant alloys S 1 1 680 Nmm 2 200 HB S 1 2 950 Nmm 2 280 HB S 2 1 840 Nmm 2 250 HB S 2 2 1180 Nmm 2 350 HB S 2 3 1080 Nmm 2 320 HB Titanium alloys S 3 1 400 Nmm 2 S 3 2 1050 Nmm 2 320 HB S 3 3 1400 Nmm 2 410 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 Nmm 2 O 1 2 ≤ 100 Nmm 2 O 2 1 ≤ 1000 Nmm 2 O 2 2 ≤ 1000 Nmm 2 O 3 1 * Tensile strength Solid carbide drilling Cutting Data The cutting data depends extremely on the external conditions the material and machine type The indicated values are possible values which have to be increased or reduced according to the application conditions Cutting data standard values – WTX – Micropilot 70 0 010 0 013 0 015 0 019 0 022 0 025 60 0 010 0 013 0 015 0 019 0 022 0 025 60 0 010 0 013 0 015 0 019 0 022 0 025 60 0 010 0 013 0 015 0 019 0 022 0 025 60 0 010 0 013 0 015 0 019 0 022 0 025 70 0 010 0 013 0 015 0 019 0 022 0 025 60 0 010 0 013 0 015 0 019 0 022 0 025 60 0 010 0 013 0 015 0 019 0 022 0 025 60 0 010 0 013 0 015 0 019 0 022 0 025 50 0 010 0 013 0 015 0 019 0 022 0 025 50 0 005 0 006 0 007 0 010 0 013 0 015 35 0 005 0 006 0 007 0 010 0 013 0 015 40 0 005 0 006 0 007 0 010 0 013 0 015 40 0 005 0 006 0 007 0 010 0 013 0 015 40 0 005 0 006 0 007 0 010 0 013 0 015 70 0 010 0 013 0 015 0 019 0 022 0 025 70 0 010 0 013 0 015 0 019 0 022 0 025 70 0 010 0 013 0 015 0 019 0 022 0 025 70 0 010 0 013 0 015 0 019 0 022 0 025 70 0 010 0 013 0 015 0 019 0 022 0 025 70 0 010 0 013 0 015 0 019 0 022 0 025 15 0 005 0 006 0 007 0 010 0 013 0 015 15 0 005 0 006 0 007 0 010 0 013 0 015 10 0 005 0 006 0 007 0 010 0 013 0 015 10 0 005 0 006 0 007 0 010 0 013 0 015 10 0 005 0 006 0 007 0 010 0 013 0 015 30 0 005 0 006 0 007 0 010 0 013 0 015 20 0 005 0 006 0 007 0 010 0 013 0 015 10 692 without through coolant 2 5xD ≤ Ø 1 > Ø 1–1 25 > Ø 1 25–1 5 > Ø 1 5–2 > Ø 2–2 5 > Ø 2 5–3 v c m min f mm rev