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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)
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Advanced Integrated Technologies is essentially a manufacturing service company with two major divisions. The resistance welding and reflow soldering tool division grew out of our early work building micro tools for Hughes Aircraft. About the time that Microsoft was turning computers into a household item, computer hardware manufacturers were looking for companies to build reflow tools used in the assembly of hard drives and other components.

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