MACHINING CONDITION Coated ISO Material Condition Tensile StrengthRm(N/mm2) HardnessHB TT9080 <0.25 %C Annealed 420 125 460~820 >=0.25 %C Annealed 650 190 430~720 Non-alloy steel, <0.55 %C Quenched and tempered 850 250 300~660 cast steel, free cutting steel Annealed 750 220 330~720 >=0.55%C Quenched and tempered 1000 300 230~560 P Annealed 600 200 300~390 Low alloy steel and cast steel 930 275 260~560 (less than 5% alloying elements) Quenched and tempered 1000 300 230~430 1200 350 160~390 High alloy steel, cast steel Annealed 680 200 200~460 and tool steel. Quenched and tempered 1100 325 160~230 Ferritic/martensitic 680 200 230~560 M Stainless steeland cast steel Martensitic 820 240 200~490 Austenitic 600 180 300~590 Ferritic/pearlitic 180 390~820 Malleable cast iron Pearlitic 260 330~690 K Gray cast iron(GG) FerriticPearlitic 160 330~750250300~590 Cast iron nodular Ferritic 130 620~980 (GGG) Pearlitic 230 390~720 Fe based Annealed 200 130~230 Cured 280 100~160 Annealed 250 100~130 S High temp. alloys Ni orCo based Cured 350 50~80 Cast 320 50~100 Titanium, Rm 400 300~620 Ti alloys Alpha+beta alloys cured Rm 1050 100~200 ■ Feed Rate Neutral: .002" ~ .007" ipr Handed: Reduce 20% feed rate 211