For hardening alloy steels and high speed steels, they are heated to Options: A . &nbsp500 to` 600^circ`C B . &nbsp700 to `900^circ`C C . &nbsp1100 to` 1300^circ`C D . &nbsp1300 to` 1500^circ`C

Question

For hardening alloy steels and high speed steels, they are heated to

Options:

A . 500 to` 600^circ`C

B . 700 to `900^circ`C

C . 1100 to` 1300^circ`C

D . 1300 to` 1500^circ`C

Answer: Option C

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