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It's mostly 4130. I am brazing it as it will be powder coated like the rest of the frameset and I thought it would look great. When I do stainless racks I have mostly been Tig welding it, but I don't really enjoy TIG welding racks tbh. The 10mm tubes distort a lot when Tig welded I find. I have done a couple of racks with fillet pro, but it is soooo mega expensive.
My next rack will be for my private ATB and that will likely be TIG stainless.
ah interesting. is the rack stainless? is the reason you dont TIG it all the way just that the brass fillets look nicer?