In article , Harold and Susan Vordos says...

Mechanical as regards strength, hardness, and machineability.

Use aluminum,
But probably horrible in the way of contact value, however.

Umm, Harold, that wasn't one of the properties he listed.

Aluminum
enjoys forming aluminum oxide rapidly---which is not known for its good
electrical properties.

Heavy duty silver contacts are made from tungsten powder and
silver------which yield the best of all worlds. Don't have a clue how
they'd machine, but I can't help but believe they'd be tough on tools.

They also use to be made from sintered silver, Wo, and Cd. I
knew a group at GTE labs that were trying to eliminate the Cd
from those.

Jim


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