Silver - Sterling
Sterling Silver is an alloy composed of at least 92.5% silver. The remaining 7.5% is almost always copper because, in general, other metals have proved less desirable and are less effective hardeners. Sterling silver is a good conductor of heat and electricity and has good machinability, malleability and ductility.
Typical Properties:
Composition in percent:
Ag 92.5
Cu 7.5
Density: 10.36 g/cm3
Liquidus temperature: 788 oC
Solidus temperature: 891 oC
Thermal expansion (20 ºC): 1.9*10-5 oCˉ1
Specific heat capacity: 0.245 kJ/kg*K
Electrical conductivity (IACS): 96 %
Tensile strength (annealed): 207 MPa
Yield strength (annealed): 124 MPa
Elongation (annealed): 41 %
Tensile strength (wire, annealed): 283 MPa
Elongation (wire, annealed): 40 %
Hardness (wire, annealed): 71 HV
Tensile strength (wire, 1/2 hard): 386 MPa
Hardness (wire, 1/2 hard): 95 HV
Tensile strength (wire, full hard): 496 MPa
Hardness (wire, full hard): 123 HV
Tensile strength (wire, spring hard): 552 MPa
Hardness (wire, spring hard): 140 HV