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Sterling Silver:
Sterling silver is an alloy of  silver containing 92.5 % by weight of silver and 7.5 % by weight of other metals, usually copper. The sterling silver standard has a minimum millesimal fitness of 925.
Fine Silver, for example 99.9% pure silver, is generally too soft for producing functional objects; therefore, the silver is usually alloyed with copper to give it strength while preserving the ductility and appearance of the precious metal. Other metals can replace the copper, usually with the intention of improving various properties of the basic sterling alloy such as reducing casting porosity, eliminating fire scale, and increasing resistance to tarnish. These replacement metals include, zinc and platinum, as well as a variety of other additives, including silicon and boron.
Regardless, Sterling is considered a standard among Silver grades and provides strength to ensure that pieces like silver bracelets, rings and necklaces can withstand regular use.


Sterling Silver Material Properties:

Sterling Silver is an alloy made of 92.5% pure silver and 7.5% copper. Sterling silver is known for its

• Bright appearance
• Easy to solder
• Association with elegance
• Relatively low cost compared to other precious metals
• Good machinability
• Good conductor of heat and electricity
• Malleable and ductile (i.e., can be beaten and drawn into a wire)
• Good reflector of light (i.e., shiny)

 Fine silver (99.9% pure) is generally too soft for producing functional objects; therefore, the silver is usually alloyed with copper to give it strength, while at the same time preserving the ductility and beauty of the precious metal.

Some material properties include:

Sterling Silver

Chemical Composition: Ag=92.5% Cu=7.5%

Density

10.37*103

Specific Heat Capacity

245

Electrical Conductivity

96

Liquids Temperature

788oC

Solidus Temperature

891oC

Hardness(wire, annealed)

71

Hardness(wire, full hard)

123

Tensile Strength(wire, annealed)

283

Tensile Strength(wire, full hard)

496