Question

Shell molding process is a costly process for gray iron castings.

(a) True

(b) False

This question was posed to me by my school teacher while I was bunking the class.

This intriguing question comes from Cast Irons in portion Foundry Introduction & Materials of Casting-Forming-Welding II

Answer 1

The correct option is (b) False

The explanation: When gray cast irons have to be processed, there is some amount of machining required to it, which demand high costs. But, if gray cast irons have to be shell molded, the overall cost of the product goes down, making it an economical process.