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Stainless Machinability Ratings

MACHINABILITY RATINGS STAINLESS

 

GRADE

APPROXIMATE
SURF. FT.
PER MIN.

% RELATIVE SPEED
BASED ON
C-1212 as 100%

GRADE

APPROXIMATE
SURF.FT.
PER MIN.

% RELATIVE SPEED
BASED ON
C-1212 as 100% (165 SFM)

302

70

40

420

85

50

302/304 "B"

55

28

420F

125

68

303

150

75

422

85

50

303 High Tensile

80

43

430

110

66

304

70

40

430F

150

75

304L

70

40

431

80

48

309

60

36

440 A

65

40

310

60

36

440 C

65

40

316

60

36

440 F Se

80

48

316"B"

50

22

446

60

36

316 L

60

36

Custom 455(12-9-2)

55

28

317-317 L

60

36

PH-13-8 MO

60

36

317 LM

60

36

15-5 PH

75

45

321

60

36

15-7

75

45

330

45

20

17-4 PH

75

45

347

60

36

17-4 PH "H1150"

85

50

403

95

54

17-7 PH

75

45

410

95

54

AM 355

72

42

416 Ann

150

75

Alloy N 40

50

22

416 H.T.

85

50

Alloy N 50

50

22

418 (Greek Ascoloy)

96

50

Alloy N 60

50

22

Alloy 20

70

40

ALLOY STEELS

E-17-22A

95

57

E-52100

65

40

E-4130

120

72

E-6150

100

60

E-4130 H.T.

65

40

E-8740

110

66

E-4140

110

66

E-9310

80

49

E-4330 Mod

95

57

Nitriding

83

51

E-4340

95

57

H-11

75

45

E-4340



Hy-Tuf

75

45

Mod "300M"

95

57

D6AC

80

49

E-4620

110

66

9-4 30

75

45

 

 

 

 

 

 
 
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