The OP asked about metals melting in the 400C to 600C range, Cerrobend
at least melts about 70C, as marked on my ingot.

Sam Soltan wrote:

I believe the stuff is Cerrobend or Cerromatrix


http://www.hitechalloys.com/hitechalloys_002.htm

"Don Stauffer in Minnesota" wrote in message
roups.com...

On Aug 8, 7:33 am, wrote:

Hello!

I just want to know which metals have low melting points in the range
of 400 to 600 degrees Celcius?

Various alloys of tin, lead, antimony, bismuth.

Micro Mark sells such metal ingots in a couple of melting temps.