Fine sumary.


"Some of the heat treated steels lose strength at the joints if the joints are heated too much during the joining process"

Though this should be dealt with by the fact the tubing is thicker at the butts.

", while newer air hardening steels actually become stronger at the joints with higher heat."

Though the degrees to which this is true is not praticularly controlable and just a characteristic of the kind of steel used. The main advantage is that any hardness in this kind of steel isn't drawn by heating, not that it gains some degree of strength from random heat exposure

"For this reason, frames built using heat treated steels like Reynolds 753 are usually built using lugs and silver brazing rather than welding,"

I'm not familiar with these steels but if they are heat treated the hardness will be drawn by heating them to the degree required by either process mentioned, and heat treating the whole frame would be done at elevated temps that could even flow the brass. We are talking unifrom cherry heat here. Though brass is harder to flow on the reheat. Hey if they are doing this stuff, more power to them.

"and air hardening steels like Reynolds 853 can be TIG welded without too much concern that the heat used in joining the tubes will weaken the steel."

Again, not really a concern. People are just reading the tech and saying because something happens, that in some context is positive it has to be key here also. There isn't any problem with TIG on any chromo.