Annealing temp of Be-Cu #172

[NanoMan]

We're trying to estimate whether we need to use heat sinks when flame soldering Beryllium Copper parts in order to assure that they aren't sufficiently annealed so as to lose their "springiness".

Any ideas about permissible temperatures?

 

[SMF1964]

High strength BeCu alloys are aged in the 550-750 F range, high conductivity BeCu alloys are aged in the 850-950 F range. Heating above these ranges will overage the material and you will get softening. Staying below these temperatures will avoid the over-ageing issue. If your concern is about solution annealing it, and destroying any precipitation hardening that was done to it, then you're dealing with higher temperatures still, on the order of 1000-1500 F. Perhaps the way to go is to find out what your material was heat treated to in the first place and stay well below that ageing temperature.

 

[israelkk]

In such cases it is best to do the soldring and the heat treatment at the same time in the heat treating oven. Therefore, you sould use a solder that melts in the temperature of the heat treatment. In such a process the temperature is controlled and accurate where with flame soldering this is very difficult to contol the temperature.