Bronze or Silver for braze-ons?

My first 2 frames were ‘simple’ bronze brazed 1x frames with silver used only for the bottle bosses and some internal guide tubing.

Next frame ideally wants to have a front mech hanger and likely seat binder bosses brazed on. Would these typically be bronze or silver brazed? (I can sort of see arguments for either, so seeking advice from those who know what they’re doing!)

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In decades past, bronze/brass was used on many frames for everything, and those bikes survived. But tubing was thicker in those days, most of our modern tube sets are a fair bit thinner than Columbus SP, SL, or 531 ST. No reason not to use silver on these and good reasons to do so. Front mech hangers are usually high enough up that they are in the thinner butted section of the seat tube, silver’s less likely to cause distortion. I’ve installed plenty of seat binders with silver, nary a problem yet.

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Some seat binder and seat tube combos are easy to bronze braze, and some are easy to distort while bronze brazing. I think it depends on the style of binder and the thickness of the seat tube. What are you thinking of using for a seat tube and binder?

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Seat tube will be a Columbus ‘Life’ externally butted tube for 27.2 seatpost - binder will (hopefully!) be whatever Ceeway have available, I’m assuming something like one of these - if they have anything to suit.

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Those llewellyn binders are great and a delight to silver braze. 100% use silver on them. They are plenty strong

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Thanks both - that puts my mind at rest. :ok_hand:t3:
I can concentrate on whatever the next unknown is now! :rofl:

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100% agree those binders are the bomb. Definitely use them and I pretty much only use silver for small brazes etc.

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Silver is easiest for braze-ons. Quick and easy brazing, little heat, works on steel and stainless, flux usually comes off easier. Fillet Pro could be a good choice for bigger stuff like binders.

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