Can pouring liquid nitrogen over big chunk of cast iron make cracks and thus breaking of c.i chunk into pieces

Question

The normal practice to break cast iron large chunk is to drop big steel ball over it from a hieght. This process in unsafe and crude considering todays technology. Since cast iron is some what rigid, liquid nitrogen stream over it may create differential expansion/contraction leading to development of crack and there fore breaking into pieces.

Answer 1

but it may react with the copper or deform it for good....which is risky....
morover the steel ball method is much cheaper.....it will make the company more profit....so why use nitrogen??

Answer 2

Sounds like a reasonable theory to me....you should test it....