Hi Bob, never done any MIG brazing, but in my last day job, I did have to do some repairs on a Go-cart that had been MIG brazed with brass filler wire, but had to do it with Oxy-acetylene, as the firm didn’t have that type of filler wire, and they weren’t prepared to buy any for a one of job. The original MIG brazing was very neat though.

Regards Nick.

I haven’t done any MIG brazing, but have done quite a few feet of of TIG brazing, with silicon bronze, recently. It seems to be a little-known or little-used technique around here, but I find it’s easier than TIG welding, being quicker and with no risk of burning through thin sheet, and accompanied by less distortion. The filler is, however, pretty expensive here in NZ.

On 3 July 2024 at 11:12 Nick Wheeler Said:

On 3 July 2024 at 07:09 simondavies3 Said:

TiG….and struggling to find a sensibly priced source of argon for the occasional Al welding that I do.

Find your nearest Hobbyweld dealer. The gas is about the same cost as from BOC, but there’s no annual rental on the cylinder or collection/delivery charges.

Thanks – sadly they don’t exist in France, neither can I find someone to refill the 2 bottles I bought outright in the NL.

Gas is VERY costly, and makes occasional DIY use a fairly expensive process. The small capacity DIY user bottles make things cheaper for home users as there is no bottle rental charge, but the gas tends to be far more expensive than an industrial user would pay with a contract arrangement.