CNMG120404/08/12 CQ 4609 Chipbreaker insert steel grade of Tabikut pack of 10

CNMG120404/08/12 CQ4609 Carbide Insert with 0.8 mm Radius used on Steel, Mild Steel General Parameters are mentioned in the box One box contains 10 inserts. This is a steel grade, not cast iron. [‘CARBIDEINSERT’, ‘CNMG’, ‘cnmg 12 insert’, ‘cnmg half inch insert for steel machining’, ‘CNMG12 INSERT’, ‘cnmg1204012 insert for steel’, ‘CNMG120408INSERT’, ‘CNMGCQCHIPBREAKERINSERT’, ‘Tabikut Inserts’, ‘Turning Inserts’]