Chapter 9     Carbon & Alloy Steels - Machining Data

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TURNING DATA FOR MEDIUM CARBON ALLOY STEELS

 

 

 

High Speed Steel Tool

Coated Carbide Tool

Material

Hardness HB

Cut

Speed

Feed

Tool

Speed

Feed

Tool
AISI Heat Treatmenta Depth in fpm ipr Material fpm ipr Materialb
1330, 1335, 175-225 0.040 135 0.007 M2, M3 650 0.007 CC-7
4028, 4037, HR, A, CD 0.150 105 0.015 M2, M3 525 0.015 CC-6
4130, 4137,   0.300 80 0.020 M2, M3 400 0.020 CC-6
4427, 4626,   0.625 65 0.030 M2, M3 --- --- ---
5130, 5135, 225-275 0.040 115 0.007 M2, M3 600 0.007 CC-7
8625, 8630, A, N, CD, QT 0.150 90 0.015 M2, M3 450 0.015 CC-6
8637, 94B30   0.300 70 0.020 M2, M3 275 0.020 CC-6
    0.625 55 0.030 M2, M3 --- --- ---
  275-325 0.040 95 0.007 T15, M42 550 0.007 CC-7
  N, QT 0.150 75 0.015 T15, M42 425 0.015 CC-6
    0.300 60 0.020 T15, M42 350 0.020 CC-6
    0.625 --- --- --- --- --- ---
  375-425 0.040 70 0.005 T15, M42 500 0.007 CC-7
  QT 0.150 55 0.010 T15, M42 350 0.015 CC-6
    0.300 40 0.015 T15, M42 300 0.020 CC-6
    0.625 --- --- --- --- --- ---

 

 

 

High Speed Steel Tool

Coated Carbide Tool

Material

Hardness HB

Cut

Speed

Feed

Tool

Speed

Feed

Tool
AISI Heat Treatmenta Depth in fpm ipr Material fpm ipr Materialb
1340, 1345, 175-225 0.040 135 0.007 M2, M3 650 0.007 CC-7
4042, 4047, HR, A, CD 0.150 105 0.015 M2, M3 525 0.015 CC-6
4140, 4147,   0.300 80 0.020 M2, M3 400 0.020 CC-6
4340, 50B46,   0.625 65 0.030 M2, M3 --- --- ---
5140, 5147, 225-275 0.040 115 0.007 M2, M3 600 0.007 CC-7
81B45, 8640, A, N, CD. QT 0.150 90 0.015 M2, M3 475 0.015 CC-6
8645, 86B45,   0.300 70 0.020 M2, M3 375 0.020 CC-6
8740, 8742   0.625 55 0.030 M2, M3 --- --- ---
  275-325 0.040 90 0.007 T15, M42 575 0.007 CC-7
  N, QT 0.150 70 0.015 T15, M42 450 0.015 CC-6
    0.300 55 0.020 T15, M42 350 0.020 CC-6
    0.625 --- --- --- --- --- ---
  325-375 0.040 70 0.005 T15, M42 500 0.007 CC-7
  N, QT 0.150 55 0.010 T15, M42 400 0.015 CC-6
    0.300 40 0.015 T15, M42 300 0.020 CC-6
    0.625 --- --- --- --- --- ---
  375-425 0.040 60 0.005 T15, M42 400 0.007 CC-7
  QT 0.150 45 0.010 T15, M42 300 0.015 CC-6
    0.300 35 0.015 T15, M42 250 0.020 CC-6
    0.625 --- --- --- --- --- ---
 a. Heat treatment abbreviations are as follows: HR - hot rolled; A - annealed; CD - cold drawn;  N - normalized; QT - quenched & tempered.
 b. Coated carbide tool material grades are designated by an additional prefix letter C, to distinguish it from the Industry Code system for
 uncoated carbide tools.
 
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