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13 Subgrupă de materiale Index Rezistenţă Nmm²* HB HRC P Oţel nealiat 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 Oţel slab aliat 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 Oţel puternic aliat şi oţel de scule P 3 1 680 Nmm 2 200 HB P 3 2 1100 Nmm 2 300 HB P 3 3 1300 Nmm 2 400 HB Oţel inoxidabil P 4 1 680 Nmm 2 200 HB P 4 2 1010 Nmm 2 300 HB M Oţel inoxidabil M 1 1 610 Nmm 2 180 HB M 2 1 300 HB M 3 1 780 Nmm 2 230 HB K Fontă cenuşie K 1 1 350 Nmm 2 180 HB K 1 2 500 Nmm 2 260 HB Fontă cu grafit nodular K 2 1 540 Nmm 2 160 HB K 2 2 845 Nmm 2 250 HB Fontă maleabilă K 3 1 440 Nmm 2 130 HB K 3 2 780 Nmm 2 230 HB N Aluminiu – aliaj forjat N 1 1 60 HB N 1 2 340 Nmm 2 100 HB Aluminiu – aliaj turnat N 2 1 250 Nmm 2 75 HB N 2 2 300 Nmm 2 90 HB N 2 3 440 Nmm 2 130 HB Cupru şi aliaje de cupru bronz alamă N 3 1 375 Nmm 2 110 HB N 3 2 300 Nmm 2 90 HB N 3 3 340 Nmm 2 100 HB Aliaje de magneziu N 4 1 70 HB S Aliaje termorezistente 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 Aliaje din titan S 3 1 400 Nmm 2 S 3 2 1050 Nmm 2 320 HB S 3 3 1400 Nmm 2 410 HB H Oţel călit H 1 1 46–55 HRC H 1 2 56–60 HRC H 1 3 61–65 HRC H 1 4 66–70 HRC Fontă dură H 2 1 400 HB Fontă călită H 3 1 55 HRC O Materiale nemetalice 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 * Rezistenţa la tracţiune Burghie din carbură solidă Date de aşchiere Parametrii de aşchiere depind în mare măsură de condiţiile externe ex stabilitatea sculei şi a portsculei tipul materialului şi a maşinii Valorile date indică datele de aşchiere posibile care pot fi majorate sau reduse potrivit condiţiilor de utilizare Date orientative de aşchiere – 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 fără răcire internă 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 rot Weiter >