Copper for boilers

[///]

Excellent thread, so to summarise so far (for my future project)
Cadmium free,
Oxygen free,
Phosphorus free,
Got it 

[Jo]

And make sure you use bronze for all the bushes.

This picture was taken about 10 seconds after when what was supposed to be a bronze bush (that was actually brass) failed on the back head of a boiler. Luckily no one was within 10ft of it when it broke. If anyone had been shovelling coal in the fire box at the time 

Jo

[10KPete]

  

That's scary!!

Just what are the preferred grades of bronze for brazing into boilers???   

Pete

[tangler]

Excellent thread, so to summarise so far (for my future project)
Cadmium free,
Oxygen free,
Phosphorus free,
Got it 

Don't forget the Zinc!

Rod

[Barneydog]

For the sakes of replacing some of what was lost in the recent migration here is what I have done.
I have bought all the copper I need for my simplex boiler. It is all C106 and all has a letter of conformity from my supplier. All the stays and bushes will be made from phosphor bronze.
Once I have shown it all to my boiler inspector and have his ok I will start. When I do start in the next few weeks I will start a new topic.

Regards

Julian

[Barneydog]

Hi Guys,

I realise it is a while since a post was added to this topic but I felt that a new post is appropriate.

We have contacted several commercial metal suppliers and they all say the same. Tube is C106 but nobody stocks or supplies C106 sheet. Almost all sheet is C101.
Reeves and GLR kennions only supply C101 with their boiler kits.

I appears that embrilltement is only an issue if the copper is melted which in our case only applies if it is welded. Silver soldering does not melt the copper.
I have spoken to my boiler inspector and he has said the same. He also said he only needs to know the copper is of decent quality and condition with the supply of certificates and receipts. He has no requirement to know the grade. We have fairly well cleared out our local copper supplier of all the C106 he had in stock so should be ok for the next couple of engines then it is on to C101 sheet.

Regards

Julian

[Jasonb]

Macc do sheet in C106

https://maccmodels.co.uk/materials-metal/copper-sections/copper-sheet/25mm-copper-sheet-300mm-x-300mm.html

C106 is also easier to flange