Heat resistant steel GradeInsertExt. ToolholderInt. ToolholderThreadingGroovingMiniature toolMilling cutterEndmillDrilling toolTooling SystemUser's GuideIndex User’s Guide - Technical Reference A Symbols of Metals ᭹ Heat resistant steel Other countriesTypeJapanInternationalU.S.A.Great BritainGermanyFranceRussiaB JIS ISO UNS AISISAE BSBS/EN DINDIN/EN NFNF/EN гOCT SUH31 331S42 Z35CNWS14-14 45X14H14B2M SUH35SUH36SUH37AusteniticSUH38 S63008S63017 349S52349S54381S34 Z52CMN21-09AzX53CrMnNi21-9Z55CMN21-09Az55X20Г9 AH4C SUH309 S30900 309 309S24 Z15CN24-13 SUH310 S31000 310 310S24 CrNi2520 Z15CN25-20 20X25H20C2 SUH330 N08330 N08330 Z12NCS35-16 SUH660 S66286 Z6NCTV25-20SUH661R30155SUH21CrAl1205FerriticSUH409X6CrTi12S40900409409S19X6CrTi12Z6CT12D SUH409L X2CrTi12 Z3CT12 SUH446 S44600 446 Z12C25 15X28 SUH1 S65007 401S45 X45CrSi9-3 Z45CS9 SUH3MartensiticSUH4SUH11SUH600 443S65 Z40CSD10 40X10C2MZ80CSN20-0240X9C220X12BHMБΦPE SUH616 S42200 ᭹ Tool steel Japan International U.S.A.Type Type Japan International U.S.A. F JIS ISO AISIASTM JIS ISO AISIASTM SK140 − − SKS5 − − SK120 C120U W1-11 1/2SK105C105UW1-10SK95−W1-9Carbon toolSK90C90U−SKS51SKS7SKS81SKS8− L6− −−−−− G steel SK85 − W1-8 SKS4 − − SK80 C80U − SKS41 − − SK75 − − SKS43 105V W2-9 1/2 SK70 C70U −SK65−−SK60−−SKH2HS18-0-1T1 SKS44SKS3SKS31SKS93 − W2-8 1/2−−−−−− H SKH3 − T4 SKS94 − − SKH4 − T5 Alloy tool SKS95 − − SKH10 − T15 steel SKD1 X210Cr12 D3SKH40HS6-5-3-8−SKD2X210CrW12−SKH50HS1-8-1−SKD10X153CrMoV12−High speedSKH51HS6-5-2M2SKD11−D2steelSKH52HS6-6-2M3-1SKD12X100CrMoV5A2I SKH53 HS6-5-3 M3-2 SKD4 − − SKH54 HS6-5-4 M4 SKD5 X30WCrV9-3 H21 SKH55 HS6-5-2-5 − SKD6 − H11 SKH56 − M36SKH57HS10-4-3-10−SKH58HS2-9-2M7SKH59HS2-9-1-8M42SKD61X40CrMoV5-1 H13SKD62X35CrWMoV5H12SKD732CrMoV12-28H10SKD838CrCoWV18-17-17H19J Alloy tool SKS11 − F2 SKT3 − − steel SKS2 − − SKT4 55NiCrMoV7 − SKS21 − − SKT6 45NiCrMo16 − ᭹ Special use steel K Japan International U.S.A. Japan International U.S.A. Type Type JIS ISO AISIASTM JISSUM11−1110SUM32SUM12−1109Free cuttingSUM41SUM219S201212carbon steelsSUM42ISOAISIASTM−−−1137−1141L SUM22 11SMn28 1213 SUM43 44SMn28 1144 Free cutting SUM22L 11SMnPb28 − SUJ1 − − carbon steels SUM23 − 1215 SUJ2 B1 52100SUM23L−−SUM24L11SMnPb2812L14SUM2512SMn35−High carbonSUJ3chromiumB2ASTM A485Grade 1SUM31−1117SUJ4−−M SUM31L − − SUJ5 − − Note: The above chart is based on published data and not authorized by each manufacturer. Tungaloy L091