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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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