Machinability Comparison Chart

Carbon steels:

 

1015

72%

1018

78%

1020

72%

1022

78%

1030

70%

1040

64%

1042

64%

1050

54%

1095

42%

1117

91%

1137

72%

1141

70%

1141 annealed

81%

1144

76%

1144 annealed

85%

1144 stressproof

83%

1212

100%

1213

136%

12L14

170%

1215

136%

  

Alloy steels:

 

2355 annealed

70%

4130 annealed

72%

4140 annealed

66%

4142 annealed

66%

41L42 annealed

77%

4150 annealed

60%

4340 annealed

57%

4620

66%

4820 annealed

49%

52100 annealed

40%

6150 annealed

60%

8620

66%

86L20

77%

9310 annealed

51%

  

Stainless Steels and Super Alloys:

 

302 annealed

45%

303 annealed

78%

304 annealed

45%

316 annealed

45%

321 annealed

36%

347 annealed

36%

410 annealed

54%

416 annealed

110%

420 annealed

45%

430 annealed

54%

431 annealed

45%

440A

45%

15-5PH condition A

48%

17-4PH condition A

48%

A286 aged

33%

Hastelloy X

19%

  

Tool Steels:

 

A-2

42%

A-6

33%

D-2

27%

D-3

27%

M-2

39%

O-1

42%

O-2

42%

  

Gray Cast Iron:

 

ASTM class 20 annealed

73%

ASTM class 25

55%

ASTM class 30

48%

ASTM class 35

48%

ASTM class 40

48%

ASTM class 45

36%

ASTM class 50

36%

  

Nodular Iron:

 

60-40-18 annealed

61%

65-45-12 annealed

61%

80-55-06

39%

  

Aluminum and Magnesium Alloys:

 

aluminum, cold drawn

360%

aluminum, cast

450%

aluminum, die cast

76%

magnesium, cold drawn

480%

magnesium, cast

480%