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Lots of good info there, Duncan. Maybe one little addition about the fluxing. A gas fluxer is really a great way to do it, particularly if you are doing production work, but you can do as well with conventional powder/paste brazing flux. The only problem with it is that you have to keep applying it to the rod as you weld, and that it's a pain to clean off the flux residue afterwards. A lot of frames have been built in 531 (and other alloy) tubes without the use of a gas fluxer.As a side note, it's not too complicated to make your own gas fluxer. Jim Schmidt (jseng1) built his own when he was making the frame for his monoshock Norton.Ken
Lots of good info there, Duncan. Maybe one little addition about the fluxing. A gas fluxer is really a great way to do it, particularly if you are doing production work, but you can do as well with conventional powder/paste brazing flux. The only problem with it is that you have to keep applying it to the rod as you weld, and that it's a pain to clean off the flux residue afterwards. A lot of frames have been built in 531 (and other alloy) tubes without the use of a gas fluxer.
As a side note, it's not too complicated to make your own gas fluxer. Jim Schmidt (jseng1) built his own when he was making the frame for his monoshock Norton.
Ken
