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What do you mean by 'tempering of steel'...

What do you mean by 'tempering of steel'?

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When hard and brite steel is heated to a certain temperature `(230^(@)C-300^(@)C)` and then allowed to cool very slowly, its brittleness desappears but its flexibility increases. This process is called tempering of steel.
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CHHAYA PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-QUESTION - ANSWER ZONE FOR BOARD EXAMINATION (VERY SHORT ANSWER TYPE )
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  19. Is carbon a satisfactory reducing agent for all metal oxides ? Explain...

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  20. What do you mean by 'tempering of steel'?

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