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How is the tensile strength of the material affected due to tempering?

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How is the tensile strength of the material affected due to tempering?

(a) Increases with an increase in temperature

(b) Decreases with an increase in temperature

(c) Increases constantly

(d) Does not change

I had been asked this question during an online exam.

This question is from Tempering in portion Heat Treatment of Engineering Material & Metallurgy

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Correct answer is (b) Decreases with an increase in temperature

For explanation: We know that hardness of the material decreases with an increase in tempering time. Similarly, the tensile and yield strengths of the material also decrease with increase in tempering temperature.

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