Correct Answer : Option (A) : Leaded brass
Explanation : Leaded brass is used for high-speed machining due to its excellent strength and heat resistance. It contains 59% Cu, 39% Zn, and 2% Pb. It is also known as free cutting brass.
Correct Answer : 88% tin, 4% copper and 8% antimony
Correct Answer : Coarse pearlite
Explanation : Hypoeutectoid steels are heated above the A3 line and then cooled in the furnace. Then it removed from the furnace and then cooled at room temperature. This results in coarse pearlite with excess ferrite.
Correct Answer : is more ductile and has a less tendency to distort during heat treatment
