Microalloyed steel is a type of alloy steel that contains small amounts of alloying elements (0.05 to 0.15%), including niobium, vanadium, titanium, molybdenum, zirconium, boron, and rare-earth metals.
[2] Weldability is good, and can even be improved by reducing carbon content while maintaining strength.
Fatigue life and wear resistance are superior to similar heat-treated steels.
If controlled cooling is used, the material can produce mechanical properties similar to Q&T steels.
However, because of this, they are through-hardened and do not have a softer and tougher core like quench and tempered steels.