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

Multiple Choice

As an alloying ingredient in high-speed steel, tungsten serves which of the following functions (two 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