Sudden cooling makes the metal extremely ductile, and slow cooling makes it brittle.
It is a silver-white ductile metal (of specific gravity 2.54) which melts at 8000.
According to Chenevix, the alloy composed of equal parts of the two metals is grey, is less ductile than its constituent metals and has the specific gravity i i.
- Alchorne showed that gold alloyed with th part of tin is sufficiently ductile to be rolled and stamped into coin, provided the metal is not annealed at a high temperature.
In view of the fact that the presence of 1% of carbon implies that 15% of the soft ductile ferrite is replaced by the glass-hard cementite, it is not surprising that even a little carbon influences the properties of the metal so profoundly.