21. Corrosion resistance of steel is increased by addition of
22. Depth of hardness of steel is increased by addition of
23. By severely deforming a metal in a particular direction it becomes
24. Iron-carbon alloys containing carbon ________ 4.3% are known as hyper-eutectic cast irons.
25. Which of the following statements are true for annealing of steels?
26. Which is false statement about annealing?
Annealing is done to
Annealing is done to
27. Eutectoid reaction occurs at
28. When steel containing less than 0.8% carbon is cooled slowly from temperatures above or within the critical range, it consists of
29. Pick up the wrong statement
30. Which of the following metal shrinks most from molten state to solid state?
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