Grade Selection Chart

Suggested Grades and Speeds for Threading

Various Workpiece Materials

workpiece groupworkpiece materialrecom uncoatedmended surface speed — PVD cSFM oated
THMTN6010TN6025
free-machining carbon steel10L18, 10L45, 1213, 12L13, 12L14, 1140, 1141, 11L44, 1151, 10L5091–9845–198
plain carbon steel10063, 1008, 1010, 1015, 1018, 1020, 1025, 1026, 1108, 111776–19845–175
alloy steels/tool steels 150–325 HB (up to 35 HRC)1042, 1045, 1070, 1080, 1085, 1090, 1095, 1541, 1561, 1572,76–19838–167
alloy steels/tool steels 330–450 HB (36–47 HRC)5140, 8620, W1, O1, S1, P20, H13, D2, A6, H13, L661–160
martensitic/ferritic stainless/precipitation hardening416, 420F, 440F, 405, 409, 429, 430, 434, 436, 442, PH45–16030–120
austenitic stainless steel201, 202, 301, 302, 303, 304, 304, 305, 321, 347, 348, 310, 314, 316, 316L, 33061–10661–19846–137
grey cast iron 135–270 HBclass 20, 30, 35, 4561–9161–23746–122
grey cast iron 275–450 HBclass 50, 55, 6045–7645–17515–76
alloy/ductile ironA536, J434C, 60-40-18, 80-55-06, 100-70-0345–7645–650100–525
free-machining aluminium alloys2024-T4, 2014-T6, 6061-T6 2011-T3, 3003-H18, A2, Alcan, Alcoa 510, Duralumin122—244122—265
high-silicon aluminium alloysA380, A390, A380-1, A390-1, A380-2
copper/zinc/brass76–18376–30446–236
non-metallicsGraphite, Nylon, Plastics, Rubbers, Phenolics, Carbon122–457122–39646–305
high-temperature alloys 125–269 HB (up to 27 HRC)Nickel 200, Monel, R405, Monel K500, INCONEL 600, INCONEL®625/901x750/718, Waspaloy, Hastelloy C24–3724–12213–76
high-temperature alloys 260–450 HB (26–47 HRC)Rene 95, Waspaloy A286, Incoloy 800, Haynes 188, Stellite F, Haynes 2524–3030–766—61
titanium alloysTi-6AI-4V, TI-5AI-2.5Sn34–5534–99

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