General purpose Wheel Tool Steel unhardened Tool Steell hardened HSS Steel unhardened HSS Steel hardened Nitriding Steel before nitriding Nitriding Steel after nitriding Grey - cast iron GG Ductile Graphite iron Stainless Steel Non - ferrous Metals plastics (Vulcolan) coated subjects                       30A 54-80 J-M 7-10 V 58A 46-80 J-M 5-10 V 30A-58A 46-80 H-L 5-10 V 30A-31A 46-80 I-M 5-10 V 30A-41A 46-80 G-K 7-14 V 30A 46-60 J-L 6-9 V 30A-70C 46-100 I-K 6-9 V 75C-58A 46-80 K-M 6-9 V 30A-58A 46-80 I-K 6-9 V 30A-75C 46-70 H-K 7-12 V Porocor, Porosic 58A 46-80 L-N 5-7 V 57A 46-60 O-P 5 B 31A 46-60 M-O 5-7 V 30A-58A 46-70 K-N 5-7 V 30A-31A 46-60 K-M 5-7 V 30A-41A 46-80 J-L 5-7 V 30A 46-60 J-L 5-7 V 30A-70C 46-80 I-K 6-9 V 30A-75C 36-54 K-M 5-7 V 30A-58A 46-70 K-M 5-7 V 75C 46-80 K-M 4-7 V 34A 36-60 P-R B Porocor, Porosic                       30A 36-60 G-J 8-12 V 31A-58A 36-60 I-K 7-9 V 30A-41A 36-60 H-J 7-10 V 31A-58A 36-60 I-K 8-10 V 41A 36-60 G-I 8-14 V 30A 36-54 I-K 8-10 V 30A-70C 36-60 H-J 8-12 V 30A-75C 36-54 I-K 8-12 V 30A-41A 36-60 H-J 8-12 V 30A-75C 36-60 H-J 8-12 V --- 30A 36-60 E-I 8-12 V 30A-57A 36-60 H-K 8-10 V 30A 36-60 G-J 8-10 V 31A 36-60 G-J 8-10 V 14A 36-60 E-H 8-14 V 30A 36-60 H-J 8-12 V 30A-70C 36-60 G-I 8-12 V 30A-75C 36-60 H-J 8-10 V 30A-41A 36-60 G-I 8-12 V 30A-75C 36-60 F-I 8-12 V --- 58A 24-36 E-J 7-14 V 58A 20-36 G-J 8-10 V 30A 20-46 F-I 8-12 V 30A-58A 20-36 F-I 8-12 V 30A-41A 20-46 E-H 8-14 V 30A 30-60 I-K 8-12 V 30A-70C 30-60 E-H 8-14 V 30A-75C 24-46 F-I 8-12 V 30A-41A 24-46 E-H 8-14 V 30A-75C 24-46 E-G 8-14 V --- 10A-26A 12-36 J-R 5 B 10A-26A 12-36 J-R 5 B --- --- --- --- --- 10A-26A 12-36 J-R 5 B 75C-86C K-R 5 B 10A-26A 12-36 J-R 5 B 10A-26A 12-36 J-R 5 B --- 30A-41A 54-80 E-J 10-14 V 30A-41A 54-80 E-J 10-14 V 30A-41A 54-80 E-J 10-14 V 30A-41A 54-80 E-J 10-14 V 30A-41A 54-80 E-J 10-14 V 30A-41A 54-80 E-J 10-14 V --- --- --- 30A-41A 54-80 E-J 10-14 V --- 30A-58A 46-80 I-L 6-9 V --- 30A-58A 46-80 I-L 6-9 V --- 32A-41A 46-80 H-K 6-9 V --- --- --- --- --- ---