MACHINABILITY OF METALS
The following chart shows the machinability of various grades of steel as compared to SAE 1212 steel.
(BASED ON 100% MACHINABILITY FOR AISI 1212 STEEL)
(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 | Percentage |
|---|---|
| 2355 annealed | 70% |
| 4130 annealed | 72% |
| 4140 annealed | 66% |
| 4142 annealed | 66% |
| 41L42 annealed | 77% |
| 4150 annealed0 | 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 | Percentage |
|---|---|
| 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%
|
|
A286 aged
|
48%
|
|
Hastelloy X
|
33%
|
|
17-4PH condition A
|
19%
|
| Tool Steels: | Percentage |
|---|---|
| A-2 | 42% |
| A-6 | 33% |
| D-2 | 27% |
| D-3 | 27% |
| M-2 | 39% |
| O-1 | 42% |
|
O-2
|
42%
|
|
Gray Cast Iron: |
Percentage |
|---|---|
| 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: | Percentage |
|---|---|
| 60-40-18 annealed | 61% |
| 65-45-12 annealed | 61% |
|
80-55-06
|
31% |
|
Aluminum and Magnesium Alloys: |
Percentage |
|---|---|
| aluminum, cold drawn | 360% |
| aluminum, cast | 450% |
| aluminum, die cast | 76% |
| magnesium, cold drawn | 480% |
|
magnesium, cast
|
480%
|
Machinability of Metals
The following chart shows the machinability of various grades of steel as compared to SAE 1212 steel.
(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 | Percentage |
|---|---|
| 2355 annealed | 70% |
| 4130 annealed | 72% |
| 4140 annealed | 66% |
| 4142 annealed | 66% |
| 41L42 annealed | 77% |
| 4150 annealed0 | 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 | Percentage |
|---|---|
| 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% |
A286 aged | 48% |
Hastelloy X | 33% |
17-4PH condition A | 19% |
| Tool Steels: | Percentage |
|---|---|
| A-2 | 42% |
| A-6 | 33% |
| D-2 | 27% |
| D-3 | 27% |
| M-2 | 39% |
| O-1 | 42% |
O-2 | 42% |
Gray Cast Iron: | Percentage |
|---|---|
| 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: | Percentage |
|---|---|
| 60-40-18 annealed | 61% |
| 65-45-12 annealed | 61% |
80-55-06 | 31% |
Aluminum and Magnesium Alloys: | Percentage |
|---|---|
| aluminum, cold drawn | 360% |
| aluminum, cast | 450% |
| aluminum, die cast | 76% |
| magnesium, cold drawn | 480% |
magnesium, cast | 480% |
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