Tin ingot, pure tin ingot Sn99.9%
Melting point: 231.93°C
Tin is a silvery-white, highly lustrous metal that is soft and ductile. The density is 7280 kg/m3. Tensile strength 35 N mm-2, Brinell hardness 12 HB, melting point 232ºC, boiling point 2430ºC , relative atomic mass 118.710 , atomic number 50 and specific thermal conductivity 66 W/mK. Below 13.2ºC it occurs with the modification, cubic -, which has the diamond lattice. Tin in this case is gray and brittle, the objects slowly decompose to gray powder, avoidable by admixing bismuth. The β-modification is tetragonal and very soft and pliable. The transformation from β to α is very slow, so Sn can be used below 13.2ºC. (At low temperatures, for example -40ºC, the transformation takes place in a few hours). At temperatures above 116ºC the metal becomes brittle (grain tin).
