Cast Steel Cranks 1

[swall]

I have heard of aftermarket performance cranks being described as "cast steel". I suspect they are nodular cast iron or austempered ductile iron. A cast steel crank would be unlikely, but not totally beyond the realm of possibility. Anyone know what these really are?

 

[patprimmer]

I have always presumed nodular cast iron, but I don't really know.

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[StefanHamminga]

Here (in the netherlands) both terms are used distinctively. From what I've seen cast steel is supposed to have significantly less carbon in it, making it less 'castable' but tougher.

Stefan Hamminga
EngIT Solutions
CSWP/Mechanical designer
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[arunmrao]

Nodular iron is preferred alloy,as it has lower density than steel, better machinability than steel,cost of production of nodular iron is lower compared to steel casting.

I shall be glad if steel castings are to be substituted,for that would mean good business for me.

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[swall]

I did some googling and found several vendors that offer "cast steel crankshafts" made from "80-60-06" alloy. Not only is this nodular iron, rather than steel, but they didn't even get the designation right (it is 80-55-06). The "80" is normally dropped. Another case of marketing hype/ignorance. End of excercise.

 

[jminahan]

My grandfather is a pattern maker for a local foundry in Grass Valley, ca and they cast almost exclusively 4130.
Jason.