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Building Materials

Q1:

Vanadium steel is generally used for

A railway switches and crossing

B bearing balls

C magnets

D axles and springs.

ANS:D - axles and springs.

Chromium-vanadium steel (symbol Cr-V or CrV; 6000-series SAE steel grades) is a group of steel alloys incorporating carbon (0.50%) , manganese (0.70-0. 90%) , silicon (0.30%) , chromium (0.80-1. 10%) , and vanadium (0.18%). Some forms can be used as high-speed steel. Chromium and vanadium both make the steel more hardenable.



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