Chapter 16      Stainless Steels - Machining Data

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 TURNING DATA FOR FREE MACHINING MARTENSITIC STAINLESS STEELS

 

Hardness HB

 

High Speed Steel Tool

Coated Carbide Tool

Material

Heat

Cut

Speed

Feed

Tool

Speed

Feed

Tool
AISI Treatmenta Depth in fpm lpr Material fpm lpr Materialb
 416, 416Se 185-240 0.040 175 0.007 M2, M3 775 0.007 CC-7
 420F, 420F Se A, CD 0.150 150 0.015 M2, M3 675 0.015 CC-6
 440F, 440F Se   0.300 120 0.020 M2, M3 400 0.020 CC-6
    0.625 90 0.030 M2, M3 --- --- ---
  275-325 0.040 100 0.007 T15, M42 575 0.007 CC-7
  QT 0.150 80 0.015 T15, M42 525 0.015 CC-6
    0.300 60 0.020 T15, M42 400 0.020 CC-6
    0.625 --- --- T15, M42 --- --- ---
  375-425 0.040 60 0.005 T15, M42 300 0.005 CC-7
  QT 0.150 50 0.010 T15, M42 250 0.010 CC-6
    0.300 40 0.015 T15, M42 200 0.015 CC-6
    0.625 --- --- T15, M42 --- --- ---
 a. Heat treatment abbreviations are as follows: A - annealed; CD - cold drawn; QT - quenched & tempered.
 b. Coated carbide tool material grades are designated by additional prefix letter C, to distinguish it from the Industry Code system for
 uncoated carbide tools.
 

           

 The Ferrous Metals Data Book

bsp;         

 The Ferrous Metals Data Book