Grade Hardness (Hv) T.R.S. (kg/mm2) Applications

BN100 400-4500 80 Turning of gray cast iron and exotic materials
BNX10 2800-3200 80-90 High speed continuous cutting of hardened steels
BN250 3200-3500 100-110 Continuous to moderately interrupted cutting of hardened steels and cast irons
BNX20 3200-3400 95-110 High speed continuous cutting of hardened steels
(HrC 45-68)
BNX25 3000-3200 100-110 High speed continuous cutting of hardened steels
(HrC 45-68)