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Temper embrittlement occurs at a temperature __________

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Temper embrittlement occurs at a temperature __________

(a) Below 0^oC

(b) Above 250^oC

(c) Above 575^oC

(d) Above 1000^oC

I got this question by my school teacher while I was bunking the class.

My question is from Tempering topic in division Heat Treatment of Engineering Material & Metallurgy

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The correct answer is (c) Above 575^oC

Explanation: Tempering of some steels and alloys may result in the reduction of toughness. This phenomenon is known as temper embrittlement. Temper embrittlement occurs when the steel is tempered above 575^oC which is followed by slow cooling to room temperature.

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