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Technical Information Grade Selection Chart Suggested Grades and Speeds for Threading Various Workpiece Materials recommended surface speed — SFM workpiece material uncoated PVD coated THM TN6010 TN6025 free-machining carbon steel 10L18, 10L45, 1213, 12L13, 12L14, 1140, 1141, 11L44, 1151, 10L50 — 91–98 45–198 plain carbon steel 10063, 1008, 1010, 1015, 1018, 1020, 1025, 1026, 1108, 1117 — 76–198 45–175 — 76–198 38–167 — 61–160 — — 45–160 30–120 alloy steels/tool steels 150–325 HB (up to 35 HRC) alloy steels/tool steels 330–450 HB (36–47 HRC) 1042, 1045, 1070, 1080, 1085, 1090, 1095, 1541, 1561, 1572, 5140, 8620, W1, O1, S1, P20, H13, D2, A6, H13, L6 martensitic/ferritic stainless/precipitation hardening 416, 420F, 440F, 405, 409, 429, 430, 434, 436, 442, PH austenitic stainless steel 201, 202, 301, 302, 303, 304, 304, 305, 321, 347, 348, 310, 314, 316, 316L, 330 61–106 61–198 46–137 grey cast iron 135–270 HB class 20, 30, 35, 45 61–91 61–237 46–122 grey cast iron 275–450 HB class 50, 55, 60 45–76 45–175 15–76 alloy/ductile iron A536, J434C, 60-40-18, 80-55-06, 100-70-03 45–76 45–650 100–525 free-machining aluminium alloys 2024-T4, 2014-T6, 6061-T6 2011-T3, 3003-H18, A2, Alcan, Alcoa 510, Duralumin 122—244 122—265 — high-silicon aluminium alloys A380, A390, A380-1, A390-1, A380-2 — — — 76–183 76–304 46–236 122–457 122–396 46–305 copper/zinc/brass non-metallics Graphite, Nylon, Plastics, Rubbers, Phenolics, Carbon high-temperature alloys 125–269 HB (up to 27 HRC) Nickel 200, Monel, R405, Monel K500, INCONEL 600, INCONEL ® 625/901x750/718, Waspaloy, Hastelloy C 24–37 24–122 13–76 high-temperature alloys 260–450 HB (26–47 HRC) Rene 95, Waspaloy A286, Incoloy 800, Haynes 188, Stellite F, Haynes 25 24–30 30–76 6—61 titanium alloys Ti-6AI-4V, TI-5AI-2.5Sn 34–55 34–99 — NOTE: When workpiece hardness levels are at the top of a range, starting m/min should be at the lower end. Regularly inspect insert clamps for worn ﬂ ats. widia.com Edge preparation: Uncoated — sharp PVD coated — light hone except positive top rake, top rake-sharp F81 workpiece group

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