ISOWorkpiece materialsHardnessPriorityGradeChip- breakerCutting speed Vc (m/min)Feed per tooth fz (mm/t)
Low carbon steel- 300 HBFirst choiceAH3135NMJ100 - 2500.08 - 0.15
S15C, S20S, etc.- 300 HBWear resistanceT3225NMJ100 - 3000.08 - 0.15
C15, C20, etc.- 300 HBFor finishingAH3135MJ100 - 2500.08 - 0.20
Carbon steel and alloy steel- 300 HBFirst choiceAH3135NMJ100 - 2300.08 - 0.15
S55C, SCM440, etc.- 300 HBWear resistanceT3225NMJ100 - 2800.08 - 0.15
C55, 42CrMo4, etc.- 300 HBFor finishingAH3135MJ100 - 2300.08 - 0.20
30 - 40 HRCFirst choiceAH3135NMJ100 - 1800.08 - 0.15
Prehardened steel NAK80, PX5, etc.30 - 40 HRCWear resistanceT3225NMJ100 - 2000.08 - 0.15
30 - 40 HRCFor finishingAH3135MJ100 - 1800.08 - 0.20
Stainless steel-First choiceAH3135NMJ90 - 2000.08 - 0.15
SUS304, SUS316, etc.-Wear resistanceT3225NMJ90 - 2500.08 - 0.15
X5CrNi18-9, X5CrNiMo17-12-3, etc.-For finishingAH3135MJ90 - 2000.08 - 0.20
Grey cast iron150 - 250 HBFirst choiceAH120NMJ140 - 2500.08 - 0.15
FC250, FC300, etc.150 - 250 HBWear resistanceT1215NMJ150 - 3000.08 - 0.15
250, 300, etc.150 - 250 HBFor finishingAH120MJ140 - 2500.08 - 0.25
Ductile cast iron150 - 250 HBFirst choiceAH120NMJ140 - 2500.08 - 0.15
FCD400, FCD600, etc.150 - 250 HBWear resistanceT1215NMJ150 - 3000.08 - 0.15
400-15S, 600-3, etc.150 - 250 HBFor finishingAH120MJ140 - 2500.08 - 0.25
Titanium alloys-First choiceAH120NMJ20 - 600.08 - 0.15
Ti-6AI-4V, etc.-For finishingAH120MJ20 - 600.08 - 0.18
Heat-resistant alloys-First choiceAH120NMJ20 - 400.08 - 0.13
Inconel718, etc.-For finishingAH120MJ20 - 400.08 - 0.15

* When using the -NMJ chipbreaker, do not feed higher than 0.15 mm/t. H

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