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Peter Russell 4	29/01/2019 17:27:59
72 forum posts 1 photos	Hi can any one advise on which material to use for a super heater in a model locomotive. I guess it should be stainless - but which one 304 316 etc What wall thickness based on 3mm od How to bend it. Assuming it will be a single piece bent the joints will be in the smoke box so could they be high temp silver soldered. Its going in a single flue tube gas fired boiler Any other advice please
Thor 🇳🇴	29/01/2019 17:54:32
1766 forum posts 46 photos	Hi Peter, The subject has been discussed before, here are a few links: *Link* *Link* *Link* Thor
duncan webster	29/01/2019 19:35:54
5307 forum posts 83 photos	Do you really mean 3mm OD? That is going to be very small ID. As for material, use what you can get, I doubt you'll have much choice
JasonB	29/01/2019 19:38:22
25215 forum posts 3105 photos 1 articles	Could you get much larger into a G1 loco?
Simon Collier	30/01/2019 02:31:14
525 forum posts 65 photos	This is a superheater for my G1 Eric made from a bit of 4 mm tube scrounged from a dead coffee machine. Stainless but no idea what grade, but good enough for the temperatures and pressures of an espresso machine. The inside radius is about 7/8". When I bend small tube I make a groove as wide as the diameter- a close fit- in a bit of bar with a parting tool, as deep as the diameter. I anneal the tube and bend. It can't flatten as it is constrained by the groove walls. Roundhouse use 1/8" stainless superheaters in their locos and kits.

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