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No and yes; and no. Pearlitic grey freezes as austenite plus graphite. It shrinks as it cools until the austenite transforms to pearlite , this causes expansion over a very short temperature range . Then the pearlite and graphite continue to shrink. This is a higher strength grey iron. The other grey iron ( most common): Ferritic iron probably freezes as ...


The thermal expansion coefficient for grey cast iron is ~ 10.8 in/(in*degR) see: list of expansion coefficients. This would indicate that expansion is expected from ambient temperature to melting temperature so the reverse would be to expect shrinkage while cooling to ambient temperature. Slightly related note, I was taught that gray cast iron is more ...


Tin electro plate would be easy to do ,so likely cheaper than nickel despite the high price of tin. .

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