Question

High manganese content in cast iron provides excellent weld-ability of the material.

(a) True

(b) False

I have been asked this question by my college director while I was bunking the class.

Origin of the question is Cast Irons topic in section Foundry Introduction & Materials of Casting-Forming-Welding II

Answer 1

Right choice is (b) False

To explain I would say: Cast iron mostly contains 2 to 5% carbon, 1 to 3% silicon and approx 1% manganese. The presence of such contents makes their weld-ability poor. Cast irons are relatively cheap and can be easily casted into any complex shapes and machined, but most of the grades of cast iron are not weld-able.