I have over the last few months ploughed through R J Matthys book on pendulum design. For most of it he seems to be suggesting Be-Cu is the best all-round material for suspension springs. Then, right at the end he suddenly seems to change his mind and tells us to go for Al-Bronze!
Other sources suggest that the Al-bronze has poor fatigue resistance and is not easily solderable. If true these don’t seem to make it such a great choice, overall. I guess it’s all about what parameter we all rate highest.
Anyone care to comment on their experiences?
Gerry