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  1. Carbon steel
  2. Tool steel
  3. Carbide
  4. Cast alloy
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1 Answers

Option 3 : Carbide

Concept:

Cutting speed used for different tool materials are:

HSS (minimum speed), 10 - 60 m/min < Cast alloy < Carbide, (30 - 140 m/min) < Cemented carbide, 150 m/min < Cermets, (150 - 350 m/min) < Ceramics or sintered oxide (maximum speed), more than 500 m/min

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