Suggestions on how to repair this brass tube

[RBDIVE]

I'm in need of the greater wisdom...
The picture shows a crack and a small piece missing on a hollow brass tube measuring about 1" diameter with a wall thickness of approximately 1mm.
The tube is fixed to a extruded section with some type of welding. The crack is through thd hollow brass tube not the join. This all forms a window surround to a pre war car im restoring so can't be replaced.
Whilst cracked the parts are not loose

I'm expecting this to be outside my skill level whilst I'm fine with mig and just about ok with tig on steel I have not attempted anything like this.
This evening I did try to tig some brass sheet which as expecting ended without any glimpse of hope.

Can anyone offer advice or know anyone that can take on this repair ?
I do have an ac/dc tig (sherman 206) so happy to have a go on more scrap. Or would silver soldering be the best option? Ultimately this will all need chrome plating so nut much room for error
Thanks in advance

 

[doubleboost]

Silver solder would be the best option
Brass is very dirty stuff once you get it to hot the zink boils out of it giving off very nasty fumes
Could a thin tube be inserted then soldering it all together

 

[Kram]

Is it currently chromed? That may be a problem.

Brass can be tig'd but you must wear a filter mask, and its messy. Theres quite a few sucessfull videos on YT. Ive only had a brief play on scrap but its not too bad.

Silver braze will fill in the cracks, keep the temperature at the low end so it doesnt flow too much. The bigger hole would be best to braze in a patch.

 

[RBDIVE]

Kram, No not currently chromed
And doubleboost a thin tube could possibly be pushed into as long as I can keep it away from the ends where the hinge pins insert.

 

[James1979]

Silver solder would be the best option
Brass is very dirty stuff once you get it to hot the zink boils out of it giving off very nasty fumes
Could a thin tube be inserted then soldering it all together

Beat me to it. Silver solder

Brazing brass is a nightmare. Been there earlier this year and wasted a lot of time before I convinced a customer silver solder was the best option. All the melting points are too close with brass and brazing

I wondered about a rod which you could then remove but a thin wall tube left in is even better.

 

[brightspark]

sleeve and fit a small patch in silver solder as in post 2 just grind out and scrupulously clean and flux 1st

 

[doubleboost]

I would have a go at it for you
It would make a decent video

 

[Kram]

I rembered, I'd probably use a stick of this, it is good stuff and quite cheap. The long melting range helps fill gaps and I have used it on brass a few times. It doea need flux when used on brass - but not copper, easyflo flux works.

Johnson Matthey 3.0mm Silbralloy Copper - Copper B| at Zoro

Johnson Matthey - 3.0mm Silbralloy Copper - Copper Brazing Alloy available at Zoro.co.uk - UK's Leading Supplier of DIY Tools and Supplies'

www.zoro.co.uk

If it has cracked and corroded it may have lost a lot of zinc and likely to crack again. Reminds me of a CodyLab video, it may be worth trying a few times. Seems simple and easy enough.

I know chrome plate is usually done in a few stages starting with copper first, then nickel, then chrome. It shouldnt matter what filler metal the repair is done with as it will be under the copper plate, copper sticks to anything conductive.

 

[piman]

RBdive,

cut the damaged tube section out and silver solder a replacement bit of brass tube. That will be a 100% repair.

Alec

 

[RBDIVE]

Really appreciate all your input here chaps. I'll have a try on some scrap * with silver solder .. ill buy some tube to act as the scrap. Although I'm in awe with doubleboosts offer

 

[piman]

Hello Rbdive,

just to add to the above, any cracks in the flat section or elsewhere need to be filled to get a good result when it is rechromed or re nickled, otherwise they will just show through.

Alec

 

[prepman]

I'm in need of the greater wisdom...
The picture shows a crack and a small piece missing on a hollow brass tube measuring about 1" diameter with a wall thickness of approximately 1mm.
The tube is fixed to a extruded section with some type of welding. The crack is through thd hollow brass tube not the join. This all forms a window surround to a pre war car im restoring so can't be replaced.
Whilst cracked the parts are not loose

I'm expecting this to be outside my skill level whilst I'm fine with mig and just about ok with tig on steel I have not attempted anything like this.
This evening I did try to tig some brass sheet which as expecting ended without any glimpse of hope.

Can anyone offer advice or know anyone that can take on this repair ?
I do have an ac/dc tig (sherman 206) so happy to have a go on more scrap. Or would silver soldering be the best option? Ultimately this will all need chrome plating so nut much room for error
Thanks in advance

View attachment 326493

Brass shim and silver solder, as others suggest. I did make the mistake in a senior moment of using brazing rod, forgetting it was a brass component. In fact all my moments are senior

 

[RBDIVE]

Thanks chap's I've ordered some brass tube and some silver solder so hopefully at the weekend I'll get to try on that first

 

[Brad93]

Metal spray.

 

[James1979]

Thanks chap's I've ordered some brass tube and some silver solder so hopefully at the weekend I'll get to try on that first

Not wishing to teach you to suck eggs but did you put flux on the list?