Metals - Machinability

The machinability of some common metals. Machinability can be expressed as a percentage or normalized value relative to AISI No. 1112 carbon steel (100% reference).

Material	Category	Machinability (%)
1015	Carbon Steels	72
1018	Carbon Steels	78
1020	Carbon Steels	72
1022	Carbon Steels	78
1030	Carbon Steels	70
1040	Carbon Steels	64
1042	Carbon Steels	64
1050	Carbon Steels	54
1095	Carbon Steels	42
1117	Carbon Steels	91
1137	Carbon Steels	72
1141	Carbon Steels	70
1141 annealed	Carbon Steels	81
1144	Carbon Steels	76
1144 annealed	Carbon Steels	85
1144 stress-proof	Carbon Steels	83
1212	Carbon Steels	100
1213	Carbon Steels	136
12L14	Carbon Steels	170
1215	Carbon Steels	136
2355 annealed	Alloy Steels	70
4130 annealed	Alloy Steels	72
4140 annealed	Alloy Steels	66
4142 annealed	Alloy Steels	66
41L42 annealed	Alloy Steels	77
4150 annealed	Alloy Steels	60
4340 annealed	Alloy Steels	57
4620	Alloy Steels	66
4820 annealed	Alloy Steels	49
52100 annealed	Alloy Steels	40
6150 annealed	Alloy Steels	60
8620	Alloy Steels	66
86L20	Alloy Steels	77
9310 annealed	Alloy Steels	51
302 annealed	Stainless Steels and Super Alloys	45
303 annealed	Stainless Steels and Super Alloys	78
304 annealed	Stainless Steels and Super Alloys	45
316 annealed	Stainless Steels and Super Alloys	45
321 annealed	Stainless Steels and Super Alloys	36
347 annealed	Stainless Steels and Super Alloys	36
410 annealed	Stainless Steels and Super Alloys	54
416 annealed	Stainless Steels and Super Alloys	110
420 annealed	Stainless Steels and Super Alloys	45
430 annealed	Stainless Steels and Super Alloys	54
431 annealed	Stainless Steels and Super Alloys	45
440A	Stainless Steels and Super Alloys	45
15-5PH condition A	Stainless Steels and Super Alloys	48
17-4PH condition A	Stainless Steels and Super Alloys	48
A286 aged	Stainless Steels and Super Alloys	33
Hastelloy X	Stainless Steels and Super Alloys	19
A-2	Tool Steels	42
A-6	Tool Steels	33
D-2	Tool Steels	27
D-3	Tool Steels	27
M-2	Tool Steels	39
O-1	Tool Steels	42
O-2	Tool Steels	42
ASTM class 20 annealed	Gray Cast Iron	73
ASTM class 25	Gray Cast Iron	55
ASTM class 30	Gray Cast Iron	48
ASTM class 35	Gray Cast Iron	48
ASTM class 40	Gray Cast Iron	48
ASTM class 45	Gray Cast Iron	36
ASTM class 50	Gray Cast Iron	36
60-40-18 annealed	Nodular Ductile Iron	61
65-45-12 annealed	Nodular Ductile Iron	61
80-55-06	Nodular Ductile Iron	39
aluminum, cold drawn	Aluminum / Magnesium Alloys	360
aluminum, cast	Aluminum / Magnesium Alloys	450
aluminum, die cast	Aluminum / Magnesium Alloys	76
magnesium, cold drawn	Aluminum / Magnesium Alloys	480
magnesium, cast	Aluminum / Magnesium Alloys	480