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Density is increased by the forging process itself, even the cast steel cranks are lighter. Rotating weight can be a great place to go on a diet and often costs less than free.

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Is that correct? I do not think the density is much different if cast or forged, however, I am not so sure the socalled Cast steel cranks are really that!! Steel is difficult to cast, but iron is simple, and some people say their nodular cast iron cranks are cast steel!! 4% carbon make them all lighter than steel by appx 5%.
If the Scat 4" stroker cranks really was cast steel (I think I read so) I would buy them right away at 300$, or any comments???

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no it's not unless the cast billet the forged crank is shaped from has serious voids....

steel casting isn't too tough, one of our customers does it all the time....

if a "cast steel" crank of the same dimensions is significantly lighter than a forged crank with the same volume of material, it's actually nodular (ductile) iron...where steel is the continuous phase, and there's spherical nodules of carbon dispersed throughout.

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