Carl wrote:

melt the low temp metal 1st then add the others, you shouldn't need to
raise the temp above 313

Are you sure? How do you get a higher melting point metal to melt at 313F?
Seems to me the tin and bismuth would just sit there in a puddle of indium.

Now I wonder if one melted the tin with the bismuth, what that alloy would
melt at.

Wes