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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