Wrought iron is an iron alloy with very low carbon content with respect to cast iron. It is soft, ductile, magnetic, and has high elasticity and tensile strength. It can be heated and reheated and worked into various shapes.
White cast iron Is also known as chilled cast iron and is obtained by cooling rapidly. It is almost unmachinable.
White cast iron is a cast iron without any alloy addition and with low C and Si content such that the structure is hard brittle iron carbide with no free graphite.
A fast cooling rate prevents the precipitation of C as graphite.