High-Speed Steel (HSS) - M42 Premium high-speed steel with high cobalt content (8-10%), offering superior hot hardness and wear resistance 220 3500 10.5 25.5 0.44 8.20 0.29 1723 280 0.38 9500 8000 6000 4000 4000 4000 4000 1.60 2.10 4.00 10.00 18.00 30.00 48.00 75.00 110.00 160.00