Machinability of hard alloys and tool steels is improved by___________

1.	Machinability of hard alloys and tool steels is improved by_____________________?
A.	Spheroidising
B.	Annealing
C.	Tempering
D.	Normalising
Answer» C. Tempering

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Machinability of hard alloys and tool steels is improved by_____________________?

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