Cast iron:

☛ Cast iron is a hard grey metal.

☛ Cast iron is cheaper than steel

☛ CI has a low melting point with the ability to mold easily.

☛ Cast iron is used for making manhole covers, piping and guttering.

Steel:

☛ Steel is an alloy or iron

☛ Costlier.

☛ Steel is mild and harder to cast, and loses viscosity.

☛ Steel is fabricated to make tools, structures, knives etc.