|
Machinability
of Metals
(Based
on 100% machinability for AISI
1212 steel)
|
|
Carbon
steels:
|
Percentage
|
|
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%
|
|
|
