Over casting stainless steel pipework with cast iron 1

[asimpson]

I am working on a heat store concept based on cast iron with water channels to recover heat. I am considering a concept using stainless steel pipework to prevent corrosion problems with water and over-casting with iron as the bulk heat retaining medium.

Assuming there is not a better heat store concept what would be the likely pitfalls of this type of construction?

I would guess there is a strong possibility as the liquid iron comes into contact with the solid stainless steel either some or most of stainless steel would melt even if a low m.p. cast iron and high m.p. stainless were used.

Could anyone suggest C.I. and S.S. combination?

The relative quantities of material would be C.I. 20-40 kg, S.S. 3-4 Kg

Assuming s.s would survive the casting process would there be any detrimental effects on the s.s at the casting interface? Increased corrosion? Drastic loss of stability?

As an alternative would sintered iron be a viable alternative?


Thanks all

 

[EdStainless]

While you could probably do this there will be some issues. You will get sensitization of the stainless steel which can lead to corrosion. You will also get a lot of distortion.
Why not cast holes in the CI and then hydraulically expand SS tubes into them?
You could use thin wall SS (1" x 0.028") and they would easily expand.

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Plymouth Tube

 

[Compositepro]

If you are using water as the heat transfer medium then you temperature would not be very high, and concrete would make a far more economical storage medium.