Tool material used in hot machining In hot machining (workpiece preheating to reduce cutting resistance), which tool material is typically used? Choose the most appropriate option.

ConceptHot machining preheats the work to lower its strength/hardness, reducing cutting forces and tool wear. The tool must still retain strength at elevated temperature; carbide (and sometimes ceramics) are suitable choices.

EliminationsBrass/copper and stainless steel are not cutting tool materials for such duty; diamond is used for abrasive/finishing or non-ferrous cutting but is not the standard choice here.

Final AnswerTungsten carbide.