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

1.	For hardening alloy steels and high speed steels, they are heated to
A.	1100 to 1300°C
B.	1300 to 1500°C
C.	500 to 600°C
D.	700 to 900°C
Answer» B. 1300 to 1500°C

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

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