697 WORKPIECE MATERIAL GROUP (WMG) 9 ISO group Subgroup WMG (Work Material Group) kvG Examples of material (AISI, EN, DIN, ČSN, GB, SS, STN, BS, UNE, AFNOR, ASTM, GOST, UNS, UNI, ...) S1.1 Titanium or titanium alloys, with a hardnessof <200 HB1.94UNS R50250 (Grade 1), EN Ti 99.6, DIN 3.7035, BS TA.2, UNE Ti-Po2, AFNOR T-40, GOST BT1-00​,AISI R50250, 3.7025, T35, 2TA1, R50400, 3.7035, 2TA2, S1 Titanium or titanium alloys S1.2 Titanium alloys, with a hardness of200 – 280 HB1.72 UNS R56404 (Grade 29), EN Ti2Cu, DIN 3.7124, BS TA.21, UNE Ti-P11, AFNOR T-U2 , AISI TA6V, Ti-6Al-4V, Ti 10.2.3, Ti5553 S1.3 Titanium alloys, a hardness of 280 – 360 HB 1.44 UNS R54250 (Grade 38), EN TiAl6V4, DIN 3.7165, ČSN TiAl6VELI, BS TA. 13, UNE Ti-P63, AFNOR T-A6V,GOST BT6​, AISI TA6V, Ti-6Al-4V, Ti 10.2.3, Ti5553 S2.1 High-temperature Fe-based alloys with ahardness of <200 HB1.33UNS N08801 (Incoloy 801), EN X8 NiCrAlTi31-21, DIN 1.4959, BS NA 15, AFNOR Z8NC33-21​, AISI A-286,Discaloy, Haynes 556, Iconel 909, Greek Ascolloy High-temperaturealloys S2 Fe-based high-temperature alloys (superalloys with highStemperature stengthand corrosion resistant S2.2 High-temperature Fe-based alloys with ahardness of 200 – 280 HB1.17UNS N19907, EN X6NiCrTiMoVB25-15-2, DIN 1.4980, SS 2570, BS HR52, AFNOR Z6NCTDV25.15B,GOST 36НХТЮ​, AISI A-286, Discaloy, Haynes 556, Iconel 909, Greek Ascolloy surpassing that of stainless steel) S3.1 High-temperature Ni-based alloys with ahardness of <280 HBUNS A09706 (Inconel 706), EN NiCr25FeAl, DIN 2.4856, BS HR 6, ČSN Inconel 625, UNE F.3313,1.00GB 1Cr16Ni35, AFNOR NC22FeDNB, GOST XH38BT​, AISI Inconel 718, 706 Waspalloy, Udimet 720,Inconel 625 S3 Ni-based high-temperature alloys S3.2 High-temperature Ni-based alloys with ahardness of 280 – 360 HB0.83UNS N07001, EN NiCr20Co13Mo4Ti3Al, DIN 2.4654, BS HR 2, ČSN Waspaloy, AFNOR NCKD 20ATV,GOST ХН80ТБЮ​, AISI Inconel 718, 706 Waspalloy, Udimet 720, Inconel 625 S4.1 High-temperature Co-based alloys with ahardness of <240 HB0.78UNS R30016 (Stellite 6b), EN CoCr20W15Ni, DIN 2.4964, AFNOR KC 20 WN, GOST ЛК52​, AISI Haynes25, Stellite 21, 31 S4 Co-based high-temperature alloys S4.2 High-temperature Co-based alloys with ahardness of 240 – 320 HB0.67UNS R30016 (Stellite 6b), EN CoCr20W15Ni, DIN 2.4964, AFNOR KC 20 WN, GOST ЛК52​, AISI Haynes25, Stellite 21, 31