As an Alloying Ingredient in High-Speed Steel, Chromium Serves Which

Multiple Choice

As an alloying ingredient in high-speed steel, chromium serves which of the following functions (three best answers) :

A) depth hardenability during heat treatment
B) forms hard carbides to resist abrasion
C) improves strength and hardness
D) increases corrosion resistance
E) increases hot hardness
F) increases toughness