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What is the tempering temperature of P20 steel after quenching at 860℃? Use paper, hurry! ! !
The quenching temperature is 840~870℃, and the hardness after quenching is 5 1HRC, 1730MPa.

Tempering temperature is100℃/200℃/300℃/400℃/500℃/600℃/700℃.

Hardness 51HRC/50 HRC/48 HRC/46 HRC/42 HRC/36 HRC/28 HRC.

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