Jeep: engines, 4 cylinder, cast iron block, metal composition

Question
I have a metal project, I need the metal composition of the engine, and other components of the engine. I can't get this info anywhere.

Answer
It really depends on what type of engine you have.  Most have a cast iron block, steel components except for the pistons, they are usually aluminum.  Some crankshafts and camshafts are hardened or tempered steel, some cylinder heads are also aluminum but it depends on the engine.