Machinability Rating Chart

MATERIAL Hardness
BHN
Machinability
Rating
Alloy Steels, Cast Material Grade Range Range
Low Carbon 1320, 2315, 2320 150-300 .52 - .32
4110, 4120, 4320,
8020, 8620
       
Medium Carbon 1330, 1340, 2325, 175-400 .36 - .16
2330, 4125, 4130,
4140, 4330, 4340,
8030, 80B30, 8040
8430, 8440, 8630,
8640, 9525, 9530,
9535
       
Alloy Steels, Wrought      
Low Carbon 4012, 4024, 4028, 125-425 .56 - .24
4320, 4427, 4617,
4621, 4718, 4817,
5015, 5120, 8115,
8620, 8625, 8720,
9310
       
Medium Carbon 1330, 4032, 4130, 175-52RC .36 - .08
  4135, 4140, 4145,
  4150, 4340, 5130,
  5140, 5147, 5150,
  6150, 8630, 8637,
  8640, 8642, 9255,
  9260
   
High Carbon 50100, 51100,
52100, M-50
       
Free Machining Alloy Steels, Wrought    
Medium Carbon,
Resulfurized
4140, 4150 150-425 .52 - .32
       
Medium & High
Carbon Leaded
41L30, 41L40, 150-425 .60 - .36
41L47, 41L50,
43L47, 51L32,
52L100, 86L20,
86L40
       
Armor Plate, Wrought      
  MIL-S-12560 250-300 0.28
       
Aluminum Alloys, Cast   40-100 4.80
Sand and Permanent Mold X201.0, 213.0, 242.0, 40-125
(500 kg)
4.80 - 3.20
  8295.0, 319.0, F332.0,
  355.0, 356.0, 357.0,
  514.0, 520.0, A712.0,
  713.0, 850.0
       
Die Castings 360.0, A360.0, A380.0, 40-125
(500 kg)
.32 - .24
384.0, 392.0, A413.0,
443.0
       
Aluminum Alloys, Wrought   30-150
(500 kg)
4.80 - 3.20
  EC, 1060, 1145,
  1235, 2014, 2018,
  2024, 2217, 2218,
  2618, 3004, 4032,
  5050, 5056, 5086,
  5252, 5454, 5457,
  5657, 6061, 6066,
  6101, 6262, 6951,
  7004, 7039, 7075, 7175
       
Carbon Steels, Cast   100-300 .64 - .40
Low & Medium Carbon 1010, 1020, 1030,
  1040, 1050
       
Carbon Steels, Wrought   85-275 .80 - .44
Low Carbon 1005, 1009, 1011,
  1012, 1016, 1018,
  1019, 1022,1025,
  1026, 1518
       
Medium Carbon 1030, 1035, 1038, 125-425 .60 - .28
  1040, 1043, 1045,
  1049, 1053, 1524,
  1526, 1536
       
High Carbon 1060, 1065, 1070, 175-375 .44 - .28
  1075, 1080, 1085,
  1090, 1547,1551,
  1561, 1572
       
Free Machining Carbon Steels, Wrought 100-150 .80 - 1.00
Low Carbon Resulferized 1212, 1108, 1213, 1116,
  1118, 1211, B-1112
       
Medium Carbon Resulferized 1132, 1140, 1141, 1151 175-425 .72 - .28
       
Low Carbon Leaded 12L13, 12L14 100-250 1.12 - 1.08
       
Ductile Cast Irons      
Ferritic 60-40-18, 65-45-12 140-190 1.00
       
Ferritic-Pearlitic 80-55-06 190-260 .64 - .52
       
Pearlitic-Martensitic 100-70-03 240-300 0.40
       
Martensitic 120-90-02 270-400 .28 - .20
       
Austenitic (NI-RESIST Ductile) ASTM A439: Types D-2, 120-200 0.24
  D-2C, D-5, D-3A, D-5B
  ASTM A571: Type D-2M
       
  ASTM A439: Types 140-275 0.16
  D-28, D-3, D-4
       
Gray Cast Irons      
Ferritic ASTM A48: Class 20 120-150 1.2
  SAE G1800
       
Pearlitic-Ferritic ASTM A48: Class 25 160-200 0.88
  SAE G2500
       
Pearlitic ASTM A48: Classes 30, 190-220 0.64
  35 & 40 
  SAE G3000
       
Pearlitic & Free Carbides ASTM A48: Classes 220-260 0.6
  45 & 50
  SAE G3500, G4000
       
Pearlitic or Acicular & Free Carbides ASTM A48: Classes 55, 250-320 0.32
  60 & 65+
       
Austenitic (NI-RESIST) ASTM A436: Types 1, 100-250 .52 - .32
  1b, 5
  ASTM A436: Types 2,
  3, 6
       
Malleable Cast Irons      
Ferritic 32510, 35018 110-160 1.20
       
Pearlitic 40010, 43010, 45006, 160-240 .88 - .64
  45008, 48005, 50005
       
Martensitic 53004, 70003, 60004, 200-320 .60 - .28
  70002, 70004, 80002,
  90001
       
Copper Alloys, Cast      
  834, 838, 844, 854, 40-150
(500 kg)
1.6
  857, 864, 867, 928,
  934, 937,939, 944,
  957, 973, 976
       
  817, 853, 872, 876, 40-175
(500 kg)
1.4
  905, 923, 926, 947,
  952, 958
       
  801, 807, 815, 822, 40-200
(500 kg)
0.68
  826, 863, 907, 910,
  913, 916, 963
       
Copper Alloys, Wrought      
  314, 330, 353, 360, 10RB - 100RB 1.60 - 2.00
  367, 368, 377, 485
       
  226, 230, 268, 280, 10RB - 100RB 1.40 - 1.60
  464, 465, 467, 675,
  770
       
  102, 113, 115, 116, 10RB - 100RB .68 - .80
  170, 175, 505, 524,
  706, 745, 754
       
High Strength Steels, Wrought    
  300M, 4330V, 4340, 225-400
43RC - 52RC
 
  D6ac(?), H11, H13  
       
    325-375
43RC - 48RC
 
     
       
    325-375  
     
       
High Temperature Alloys      
Nickle Base, Wrought Inconel Alloy 625, 200-400 .16 - .12
  702, 706, 718, 721, 722,
  X-750, 751, & 901
  M252
  Nimonic 75 & 80
  Waspoloy (?)
       
  Astroloy, Inconel Alloy 700 225-400 .12 - .09
  Nimonic 90 & 95, Rene 41
  Udimet 500, 700, 710
       
  Hastelloy B, C, G, X 140-310 .16 - .12
  Incoloy 804, 825
  Inconel Alloy 600, 604
  Refractaloy 26
  Udimet 630
       
  TD-Nickle 180-200 .48
       
Nickle Base, Cast Hastelloy B & C ASTM A296 200-375 0.12
       
Cobalt Base, Wrought Haynes Alloy 25, 188 J-1570 180-320 .16 - .08
  MAR-M905, MAR-M918
  S-816
       
Iron Base, Wrought A-286, Discoloy 180-320 .28 - .20
  Incoloy 800, 801, 802
  N-155
       
Manganese, Wrought      
    140-220 0.28
       
Magnesium Alloys, Cast      
  AM100A, AZ81A, AZ918, 40-90
(500kg)
4.80
  AZ91C, EZ33A, HZ32A,
  K1A, ZE41A, ZK51A
       
Magnesium Alloys, Wrought      
  AZ21X1, AZ31C, AZ80A, 40-90
(500kg)
4.80
  HM21A, LA141A, ZK60A
       
Maraging Steels, Wrought      
  120 Grade 275-325 0.36
  180 Grade 375-425 0.28
  200 Grade, 250 Grade 275-325
50RC-52RC
.32 - .12
  300 Grade, 350 Grade
       
Nickel Alloys, Wrought & Cast    
  Nickel 200, 201, 205, 211, 80-170 0.56
  220, 230, & 270
       
  Monel 400, 401, 404, 115-240 0.44
  and R-405
  ASTM A296: Grades CZ-100
  M-35
       
  Duranickel 301 150-360 .16 - .12
  Monel 502 & K-500
  Ni-Span-C 902
  Permanickel 300
       
Nitriding Steels, Wrought      
  Nitralloy 125, 135, 225, 230 200-350 .52 - .40
  EZ & N. Nitrex 1
       
Refractory Alloys, Cast, Wrought, P/M    
Molybdenum MO, TZC, Mo-50Re, TZM 220-290 0.80
       
Stainless Steels, Cast      
Ferritic ASTM A217: Grades C5, C12 135-185 0.60
  ASTM A296: Grades CB-30,
  CC-50, CE-30
       
Austenitic ASTM A296: Grades CF-16F, 140-170 0.64
  CN-7M
  ASTM A296: Grades CF-3, 135-185 0.56
  CF-8, CF8C, CF-20
  ASTM A451: Grades CPF8,    
  CPF8C, CPF8C (Ta-Max)    
  ASTM A296: Grades CF-3M, 135-185 0.56
  CF-8M, CG-8M, CG-12,
  CH20, CK20
  ASTM A-451: Grades CPF8M,    
  CPF10MC, CPH8, CPH10,    
  CPH20, CPK20    
  ASTM A297: Grades HD, HE, 160-210 0.28
  HF, HH, HI, HK, HL, HN,
  HT, HU
       
Martensitic ASTM A296: Grades CA-15, 135-225 .48 - .40
  CA-40
  ASTM A426: Grades CP7,
  CP9
  ASTM A296: Grades CA-15, 275-425 .24 - .16
  CA-40
  ASTM A426: Grades CP7,
  CP9
       
Stainless Steels, Wrought      
Ferritic 405, 430, 436, 446, 135-185 0.68
  409, 434, 442, 502
       
Austenitic 201, 302, 304, 304L, 135-275 .64 - .44
  321, 347
  310, 310S, 314, 316, 135-185 0.36
  316L, 317, 330
       
Martensitic 403, 410, 420 135-275 .56 - .36
  414
       
Free Machinings Stainless Steels, Wrought    
Ferritic 430F, 430F Se 135-185 0.96
       
Austenitic 230EZ, 303, 303Se, 303MA, 135-275 .76 - .48
  303Pb, 303Cu, 303 Plus X
       
Martensitic 416, 416Se, 416 Plus X, 420F, 135-425 .88 - .24
  420F Se, 440F, 440F Se
       
Precipitation Hardening Stainless Steels, Cast    
  ACI Grade C8-7CU 325-450 .12 - .08
  ACI Grade C0-4MO
       
Precipitation Hardening Stainless Steels, Wrought    
  15-5 PH, 17-4 PH, 17-7 PH 150-375 .32 - .16
  17-14 CuMo AM-350
  AM-355, PH 13-8 Mo
  PH14-8 Mo, PH 15-7 Mo
       
Titanium Alloys, Wrought      
Commercially Pure 99.5, 99.2, 99.0, TI-0.2Pd, 110-275 .96 - .64
  99.0, 98.9
       
Alpha and Alpha-Beta Alloys Ti-8Mn, 300-340 0.46
  Ti-2A1-11Sn-5Zr-1Mo,
  Ti-5A1-2-5Sn,
  Ti-5A1-6Sn-2Zr-1Mo,
  Ti-6A1-2Sn-4Zr-2Mo-25Si
  Ti-6A1-2Sn-4Zr-6Mo
       
  Ti-6A1-4V 310-350 0.36
  Ti-6A1-4V-CL1 (???)
       
  Ti-6A1-6V-2Sn 320-370 0.32
  Ti-7A1-4Mo
       
  Ti-1A1-8V-5Fe 320-380 0.28
       
  Ti-6A1-4V 320-380 0.24
  Ti-6A1-2Sn-4Zr-2Mo
  Ti-6A1-2Sn-4Zr-6Mo
       
  Ti-4A1-3Mo-1V 375-420 0.2
  Ti-7A1-4Mo
       
  Ti-1A1-8V-5Fe 375-440 0.12
       
Beta Alloys Ti-3A1-8V-6Cr-4Mo-4Zr 275-440 .20 - .09
  Ti-4.5Sn-6Zr-11.5Mo
  Ti-13V-11Cr-3A1
       
Tool Steels, Wrought      
High Speed M1, M2, M6, M10, T1, T2, 220-275 .32 - .20
  T6, M3 Type 2, T15
       
  M3, M7, M33, M34, M36, 225-275 0.28
  M41, M42, M43, M44,
  M46, M47, T4, T5
       
Hot Work H10, H11, H12, 150-375
(48Rc-50Rc)
.32 - .08
  H13, H14
       
  H21, H24, H41, H42 150-250 .32 - .24
       
Cold Work A7, D4 200-250 0.2
       
  A2, A4, A8, A10, 01, 02, 200-250 0.32
  06, 07
       
Shock Resisting S1, S2, S5, S7 175-225 0.44
       
Zinc Alloys, Cast      
  AMS 4803A, ILZRO 12, 80-100 2.00
  ILZRO 13, SAE 903, SAE 925,
  ZDC No. 7
       
Zirconium Alloys, Wrought      
  Zr-2%Hf (Grade 11) 140-280 1.20
  Zr-0.0C1%Hf (Grade 21)
  Zircaloy 2 (Grade 32)
  Zircaloy 4 (Grade 34)