
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, ...) Gray iron, ferritic or ferritic-pearlitic with a ASTM A48 Grade 20 (F11401), EN-JL-100, DIN GG-10 (0.6010), SS 0110, STN 422410, BS Grade 150, K1.1 1.35 hardness of < 180 HB UNE FG10, GB HAT 100, AFNOR Ft10D, GOST SC 10, UNI G10 Gray iron (GG) Gray iron, ferritic-pearlitic or pearlitic with a ASTM A48 Grade 30 (F12101), EN-JL-1030, DIN GG-20 (0.6020), SS 0120, STN 422420, BS Grade 220, K1 (iron-carbon castings with a lamellar K1.2 1.00 hardness of 180 – 240 HB UNE FG20, GB HT200, AFNOR Ft20D, GOST СЧ20, UNI G20 graphite microstructure) Gray iron, pearlitic with a hardness of ASTM A48 Grade 50 (F13501), EN-JL-1060, DIN GG-35 (0.6035), SS 0135, STN 422435, BS Grade 350, K1.3 0.75 240 – 280 HB UNE FG35, GB HAT300, AFNOR Ft35D, GOST SC35, UNI G35 Malleable iron, ferritic with a hardness ASTM A602 Grade M3210 (F20000), EN-JM-1130, DIN GTS-35 (0.8135), SS 0815, BS B340/12, K2.1 1.39 of < 160 HB UNE Type A, AFNOR MN 35-10, GOST КЧ35-10 Malleable iron (GTS/GTW) Malleable iron, ferritic or pearlitic with a K2 (heat-treated iron-carbon castings with a K2.2 1.13 ASTM A602 Grade M4504 (F20001), EN-JM-1040, DIN GTS-50-05 (0.8045), BS P50-05, AFNOR MB 45-7 hardness of 160 – 200 HB graphite-free microstructure) Malleable iron, pearlitic with a hardness of ASTM A602 Grade M7002 (F20004), EN-JM-1140, DIN GTS-45 (0.8145), SS 0854, STN 422540, BS P K2.3 0.90 200 – 240 HB 45-06, UNE Typ B, AFNOR MP 50-5, GOST КЧ45-7, UNI GMN 45 Ductile (nodular/spheriodal) iron, ferritic with ASTM A536 Grade 60-40-18 (F32800), EN-JS-1030, DIN GGG-40 (0.7040), SS 0717, STN 422304, K3.1 1.23 a hardness of < 180 HB BS 420/12, UNE FGE 42-12, GB QT 400, AFNOR FGS 400-12, GOST ВЧ40 Ductile iron (GGG) Ductile (nodular/spheriodal) iron, ferritic or ASTM A536 Grade 80-55-06 (F33800), EN-JS-1050, DIN GGG-50 (0.7050), SS 0727, STN 422305, K3 (iron-carbon castings with a nodular K3.2 0.94 pearlitic with a hardness of 180 – 220 HB BS 500/7, UNE FGE 50-7, GB QT 500-7, AFNOR FGS 500-7, GOST ВЧ50 9 Cast Iron graphite microsturcture) (castings of iron and Ductile (nodular/spheriodal) iron, pearlitic ASTM A536 Grade 100-70-03 (F34800), EN-JS-1060, DIN GGG-60 (0.7060), SS 0732, STN 422306, K K3.3 0.76 carbon alloys with > with a hardness of 220 – 260 HB BS 600/3, UNE FG70-2, GB QT 600-3, AFNOR FGS 600-3, GOST ВЧ60 2 % carbon content) Austenitic cast iron with a hardness of ASTM A436 Type 1 (L-NiCuCr 15 6 2, F41000), EN-JL-3011, DIN GGL-NiMn 13 7 (0.6652), SS 0523, K4.1 1.14 < 180 HB BS Grade F1, AFNOR FGL-Ni13Mn7, GOST S-NiMn 13 7 Austenitic cast iron with a hardness of ASTM A439 Type D-2B (S-NiCr 20 3, F43001), EN-JS-3021, DIN GGG-NiMn 23 4, SS 0776, BS Grade K4.2 0.86 180 – 240 HB S2M, AFNOR FGS Ni23 Mn4, GOST ЧН19Х3Ш Austenitic or austempered ductile iron (Ni-Resist/ADI) Austempered ductile iron with a hardness K4 K4.3 0.63 ASTM A897 Grade 110-70-11 (iron-carbon alloy castings with an austenitic of 240 – 280 HB or ausferrite microstructure) Austempered ductile iron with a hardness K4.4 0.54 ASTM A897 Grade 125-80-10, EN-JS-1100, DIN GGG-90 (5.3400) of 280 – 320 HB Austempered ductile iron with a hardness K4.5 0.45 ASTM A897 Grade 2 (150-110-07), EN-JS-1110, DIN GGG-100 (5.3403) of 320 – 360 HB Vermicular, compacted graphite iron with a K5.1 1.29 ASTM A842 Grade 300, EN-GJV-300, DIN GGV 30, GOST ЧВГ30, hardness of < 180 HB Compacted graphite iron (CGI) Vermicular, compacted graphite iron with a K5 (iron-carbon castings with a vermicular K5.2 0.97 ASTM A842 Grade 350, EN-GJV-350, DIN GGV 35 (5.2200), GOST ЧВГ30, hardness of 180 – 220 HB graphite structure) Vermicular, compacted graphite iron with a K5.3 0.75 ASTM A842 Grade 450, EN-GJV-450, DIN GGV 45, GOST ЧВГ45, WORKPIECE MATERIAL GROUP (WMG) hardness of 220 – 260 HB 695