Answer
With regard to composition and heat treatment:
White iron- 2.5 to 4.0 wt% C and less than 1.0 wt% Si. There is no heat treatment but cooling is rapid during solidification.
Nodular cast iron- 2.5 to 4.0 wt% C, 1.0 to 3.0 wt% Si, and a small amount of Mg or Ce. A heat treatment at about 700°C may be necessary to produce a ferritic matrix.
Work Step by Step
With regard to composition and heat treatment:
White iron- 2.5 to 4.0 wt% C and less than 1.0 wt% Si. There is no heat treatment but cooling is rapid during solidification.
Nodular cast iron- 2.5 to 4.0 wt% C, 1.0 to 3.0 wt% Si, and a small amount of Mg or Ce. A heat treatment at about 700°C may be necessary to produce a ferritic matrix.