RECOMMENDED STARTING CUTTING SPEEDS | TURNING
Recommended Starting Speeds v c (ft/min)
Tensile Strength MPa
P105
P115
P125
P135
G625
ISO Material Group
Workpiece Material
f n (inch/rev) f n (inch/rev) .004 .008 .012 .004 .008 .012 .004 .008 .016 .004 .016 .024 .004 .008 .012 f n (inch/rev) f n (inch/rev) f n (inch/rev)
Low-Carbon Steels, Long Chipping (C < .25%) Ex. A36, 1008, 1010, 1018, 1108, 1117 Brinell Hardness HB <125 Low-Carbon Steels, Short Chipping, Free Machining (C < .25%) Ex. 10L18, 1200 Series, 1213, 12L14 Brinell Hardness HB <125
PO
<530 1760 1550 1370 1640 1445 1280 1400 1245 855 1215 790 655 655 525 400
P1
<530 1500 1330 1120 1400 1245 1050 1180 1015 655 1015 590 525 600 475 360
Medium- and High-Carbon Steels (C > .25%) Ex. 1035, 1045, 10L45, 1080, 1137, 1144, 1525, 1572 Rockwell Hardness HRC <25 Alloy Steels and Tool Steels (C > .25%) Ex. P20, 1300, 2000, 3000, 4000, 5000, 8000, SAE A, D, H, O, S, M, T Rockwell Hardness HRC <35 High-Strength Alloy Steels and Tool Steels (C > .25%) Ex. P20, 1300, 2000, 3000, 4000, 5000, 8000, SAE A, D, H, O, S, M, T Rockwell Hardness HRC 35 - 48 Ferritic, Martensitic and PH Stainless Steels Ex. 13-8 PH, 15-5 PH, 17-4 PH, 400 and 500 Series Rockwell Hardness HRC <35 High-Strength Ferritic, Martensitic and PH Stainless Steels Ex. 13-8 PH, 15-5 PH, 17-4 PH, 400 and 500 Series Rockwell Hardness HRC 35 - 48
P2
>530 1120 1050 950 1050 985 885 920 820 590 855 540 460 525 445 345
P Steel
P3
600-850 1020 850 700 950 790 655 790 720 490 625 445 330 400 300 245
P4
850-1400 850 700 560 790 655 525 590 525 330 460 300 230 310 245 180
P5
600-900 1050 880 700 985 820 655 855 720 560 625 460 330 420 320 260
P6
900-1350 630 530 350 590 490 330 425 360 300 360 260 230 230 190 135
Recommended Starting Speeds v c (ft/min)
Brinell Hardness HB
Rockwell Hardness HRC
Tensile Strength MPa
S515
M225
S525
G625
ISO Material Group
Workpiece Material
f n (inch/rev) f n (inch/rev) .004 .008 .012 .004 .008 .012 .004 .008 .012 .004 .008 .012 f n (inch/rev) f n (inch/rev)
Austenitic Stainless Steels Ex. 200 Series, 301, 302, 304, 304L, 309
M1
130-200
<600 770 625 490 790 655 525 755 600 475 470 380 300
M Stainless Steel
High-Strength Austenitic Stainless and Cast Stainless Steels Ex. 310, 316, 316L, 321, 347, 384
M2
150-230 <25 600-800 525 460 330 460 400 300 510 380 280 290 235 180
Duplex Stainless Steels Ex. 323, 329, F55, 2205
M3
135-275 <30 <800 590 525 400 510 445 330 540 400 300 320 250 190
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