High-Speed Steel (HSS) - M35 Cobalt-enriched high-speed steel with improved heat resistance and red hardness compared to M2 215 3300 10.8 25.0 0.45 8.10 0.30 1723 275 0.39 9000 7500 5500 3500 3500 3500 3500 1.70 2.30 4.50 12.00 22.00 35.00 55.00 85.00 125.00 180.00