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Bronze Welding

by Noel
(New Zealand)

I am repair welding a brass spindle from a separator used for tallow in a rendering department of a freezing works. I have tried Tig, Gas and bronze electrodes. Heated the job in a gas fired oven -none of the welds will stick and are full of holes. I have 35 years experience and am a tradesman - but this has me stumped?? My boss is driving me crazy (not a welder). Any ideas would be appreciated.

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the zinc in the brass will outgas and leave pits.

silver brazing with flox or gas welding with flux might be the ticket.

i have had some limited success using tig with pulse but always some porosity due to the zinc.

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