The role of metal elements in steel structure:
♦(C, carbon) is the most important alloying element in steel. With increased carbon content, steel becomes harder and stronger.
♦(Cr, chromium) is added to the steel to increase resistance to oxidation. The resistance of steel increases as more chromium is added.
♦(Mo, molybdenum) can promote gain-refinement in steel. It used efficiently in steel to improve hardenability and strength.
♦(V, vanadium) is characterised by high fire-resistance and is added to steel as a gain-refining agent. Vanadium is added to steel for strengthening purposes.
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