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CMW® ELKONIUM 22 silver, copper alloy

Category Metal , Nonferrous Metal , Precious Metal , Silver Alloy
Manufacturer CMW Inc.
Trade Name ELKONIUM
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF CMW® ELKONIUM 22 silver, copper alloy.pdf
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Material Notes:
Alloying copper into silver increases the hardness of the material, and its resistance to mechanical wear and deformation. The electrical and thermal conductivity remain relatively high, thus, the alloys retain good current switching characteristics. Corrosion resistance decreases as the copper content increases. Copper oxides and other films will increase the surface resistance of these materials. This will require higher closing forces, usually 2 ounces or more, and some wiping action to break through the films and establish good contact. Because of the oxidation tendency, the silver-copper alloys should be avoided in high temperature applications. The silver-copper alloy materials are ductile and can be made in almost all the same shape and size contacts as fine silver. Usually, they will show an economical advantage over fine silver.ELKONIUM 22, the eutectic alloy, contains the highest amount of copper, which will give acceptable contact performance. It has higher contact resistance and greater sticking tendencies than CMW's ELKONIUM 1 alloy.Information provided by CMW Inc.
Physical Properties Metric English Comments
Density 10.1 g/cc
0.365 lb/in³
Mechanical Properties Metric English Comments
Hardness, Rockwell 15T 81
81
annealed
87
87
cold worked
Tensile Strength, Ultimate 365 MPa
53000 psi
annealed
552 MPa
80000 psi
cold worked
Elongation at Break 5.0 %
5.0 %
cold worked
20 %
20 %
annealed
Component Elements Properties Metric English Comments
Copper, Cu 28 %
28 %
Silver, Ag 72 %
72 %
Electrical Properties Metric English Comments
Electrical Resistivity 0.00000200 ohm-cm
0.00000200 ohm-cm
84 % IACS
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