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| Q. |
Alloy steels containing 0.05% to 0.15% of alloying elements are called |
| A. | weathering steel |
| B. | stainless steel |
| C. | tool and die steel |
| D. | microalloyed steel |
| Answer» D. microalloyed steel | |
| Explanation: microalloyed steels contain alloying elements in small quantities (0.05% to 0.15%). these elements include niobium, vanadium, titanium, molybdenum, rare earth metals, among others. they are used to refine the microstructure of the grain or for precipitate hardening process. | |
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