superheaters

[Peter Russell 4Participant @peterrussell4]

General questions

[Peter Russell 4Participant @peterrussell4]

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 🇳🇴Participant @thor]

Hi Peter,

The subject has been discussed before, here are a few links:

***Link***

***Link***

***Link***

Thor

[duncan webster 1Participant @duncanwebster1]

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

[JasonBModerator @jasonb]

Could you get much larger into a G1 loco?

[Simon CollierParticipant @simoncollier74340]

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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