performance  Standard grade pure platinum  Thermoelectric pure platinum  Primary platinum  Secondary platinum  Tertiary platinum  Grade IV platinum  purity(%)  >99.999  99.999 99.99 99.9 99.5 99 Density 20 ° C (g / cm 3 )  21.45 21.45 21.4 21.4 21.29 -  Melting point (°C)  1769 1769 1769 1768.5 1765.5 -  0°C resistivity (10 -8 Ω m)  9.4 9.81 -  -  -  -  20 ° C resistivity (10 -8 Ω m)    10.58 10.6 11.6 14.9 Temperature coefficient of resistance (°C -1 )  >0.003925  0.003925 0.00392 0.0039 0.0035 -  Tensile strength (MPa)  37~42  137 42 157 50 52 Hardness (HV)  400 40 550 42~46  850 950 Annealing temperature (°C)   500  750   Latex Balloons ,Mauve Balloons,Latex Helium Balloons,Clear Latex Balloons NINGBO YAOTU TRADING COMPANY , https://www.zjnbyaotu.com
Platinum physical properties