Coated grades for Steel Turning AC8015P / AC8020P / AC8025P / AC8035P
AC8020P
Achieves both high wear resistance and stability chipping resistance more than 2.5 times
G RADE FOR H IGH E FFICIENCY M ACHNINING
High-strength Alumina Layer
Excellent chipping resistance
Enhanced chip control from increased strength of the alumina layer
AC8020P
400 Impacts
1,600 Impacts
4,000 Impacts
SEM image
Increased strength for cracking suppression
Al 2 O 3
Minimal Damage
Minor Damage
Micro Chipping
Conventional Grade
400 Impacts
1,600 Impacts
SEM image
Unable to withstand cracking
Significant Chipping
Al 2 O 3
Micro Chipping Excessive Breakage
Part Material ： Cr–Mo 4137 Steel Insert ： CNMG432EGU-AC8020P Cutting Conditions ： v c = 900 SFM f = .0118 IPR a p = .059” Wet
■ AC8020P Cutting Conditions
Soft steel, Low carbon steel (1010, etc.) Low alloy steel (4130, etc.) 180HB or less
High carbon steel (1045, etc.) High alloy steel (4137, etc.) 180HB or more
Insert
Chipbreaker
Depth of Cut (in.) Feed Rate (IPR) Speed vc (SFM) Depth of Cut (in.) Feed Rate (IPR)
Speed vc (SFM)
.004 - .050 .020 - .080 .020 - .100 .030 - .200 .070 - .235 .070 - .235 .120 - .315 .030 - .200 .070 - .235 .060 - .275 .120 - .315 .070 - .250 .080 - .315 .120 - .350
.004 - .016 .004 - .016 .004 - .024 .004 - .018 .008 - .024 .008 - .028 .014 - .032 .006 - .018 .008 - .024 .008 - .028 .014 - .032 .008 - .024 .008 - .028 .014 - .032
590 - 1475 525 - 1375 525 - 1375 525 - 1375 450 - 1150 450 - 1150 400 - 1080 360 - 1150 400 - 980 400 - 980 360 - 900 400 - 980 400 - 980 360 - 900
.004 - .050 .020 - .080 .020 - .100 .030 - .200 .070 - .235 .070 - .235 .120 - .315 .030 - .200 .070 - .235 .060 - .275 .120 - .315 .070 - .250 .080 - .315 .120 - .350
.004 - .016 .004 - .016 .004 - .024 .004 - .018 .008 - .024 .008 - .028 .014 - .032 .006 - .018 .008 - .024 .008 - .028 .014 - .032 .008 - .024 .008 - .028 .014 - .032
425 - 1300 400 - 1200 400 - 1200 400 - 1200 325 - 1000 325 - 1000 325 - 1000 325 - 1000 325 - 825 325 - 825 250 - 725 325 - 825 325 - 825 250 - 725
EFE
ELU, ESU, ESE
ESEW
CNM □ 43 □ DNM □ 43 □ SNM □ 43 □
TNM □ 33 □ TNM □ 43 □ WNM □ 43 □
EGU, EGE, EUX
EMU EME EHG
EGU, EGE, EUX
EMU EME EHG EMU EME EHG
CNM □ 54 □ SNM □ 54 □
CNM □ 64 □ CNM □ 86 □ DNM □ 54 □
SNM □ 64 □ SNM □ 86 □ TNM □ 54 □
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