15. What are the main constituent(s) of stainless steel and alloy steel?
The main constituent of stainless steel is iron. The main alloy ingredient is chromium. Stainless steel, by definition, must contain at least 10.5% chromium. Alloy steel is made by combining carbon steel with one or several alloying elements, such as manganese, silicon, nickel, titanium, copper, chromium, and aluminum.
