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This question concerns the making of alloys for casting.
I need a low-toxicity, low-melting point metal, to cast hardware parts.
The parts must not crack under torque or impact, and should remain hard up to 100 deg C.
My plan is to make a Tin/Bismuth alloy, since low-toxicity, low-melting point.
I've heard a tiny amount of silver can make this alloy less brittle.
Any suggestions? Could be a different alloy, or a hardening process.
thx!