Table 3. Cutting Speeds and Feeds for Turning Stainless Steels
Tool Material
Uncoated
Uncoated Carbide
Coated Carbide
Cermet
HSS
Hard
Tough
Hard
Tough
Brinell Hardness Number 135-185 135-185 225-275 135-185 185-240 275-325 375-425 135-185 135-185 225-275 135-185 135-175 175-225 275-325 375-425 225-275 275-325 375-425 150-200 275-325 325-375 375-450
f = feed (0.001 in/rev), s = speed (ft/min) Metric Units: f 3 25.4 = mm/rev, s 3 0.3048 = m/min Opt. Avg. Opt. Avg. Opt. Avg. Opt. Avg. Opt. Avg.
Speed (fpm)
Material
Free-machining stainless steel (Ferritic): 430F, 430FSe
20 480 13 520 13 520 13 210 20 480
10 660 7 640 7 640 7 260 10 660
36 370 36 310 36 310
17 395 17 345
17 755
8 945
28 640 28 625 28 625 28 130 28 640
13 810 13 815 13 815 13 165 13 810
7 790 7 695 7 695
3 995 3 875 3 875
f s f s f s f s f s
110 100 110 100 80
(Austenitic): 203EZ, 303, 303Se, 303MA, 303Pb, 303Cu, 303 Plus X
(Martensitic): 416, 416Se, 416 Plus X, 420F, 420FSe, 440F, 440FSe Stainless steels (Ferritic): 405, 409 429, 430, 434, 436, 442, 446, 502 (Austenitic): 201, 202, 301, 302, 304, 304L, 305, 308, 321, 347, 348 (Austenitic): 302B, 309, 309S, 310, 310S, 314, 316, 316L, 317, 330
60 30 90 75 65 70 95 85 55 35 30 60 50 40
36 85
17 135 17 395
36 370
17 755
8 945
7 790
3 995
f s
13 520
7 640
36 310
17 345
28 625
13 815
7 695
3 875
(Martensitic): 403, 410, 420, 501
f s
7 230
13 210
7 260
36 85
17 135
28 130
13 165
13 200 †
55-60 45-50
(Martensitic): 414, 431, Greek Ascoloy, 440A, 440B, 440C (Precipitation hardening):15-5PH, 17-4PH, 17-7PH, AF-71, 17-14CuMo, AFC-77, AM-350, AM-355, AM-362, Custom 455, HNM, PH13-8, PH14-8Mo, PH15-7Mo, Stainless W
13 520 13 195
7 640 7 240
36 310
17 345 17 155
28 625
13 815
13 695
7 875
f s f s
36 85
25 See footnote to Table 1 for more information. The combined feed/speed data in this table are based on tool grades (identified in Table 16) as follows: uncoated carbides, hard = 17, tough = 19; coated carbides, hard = 11, tough = 14; cermet = 7, † = 18.
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