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CMW® ELKONIUM 70 gold based alloy

Category Metal , Nonferrous Metal , Precious Metal , Gold Alloy
Manufacturer CMW Inc.
Trade Name ELKONIUM
Port Shanghai port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
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Material Notes:
Pure gold has complete resistance to atmospheric tarnish and oxidation. It does not contribute to polymer formations like platinum and palladium alloys. Wrought gold metal is very soft and prone to welding and has very few contact applications. Electroplated coatings of gold on silver and other base metals are used in dry circuit application and to provide long shelf life reliability. Gold is alloyed with other metals to improve hardness, contact performance, and reduce cost.ELKONIUM® 70 is CMW's trademark for a gold-silver-nickel alloy that has sufficient hardness for most contact applications. This alloy is completely resistant to atmospheric tarnish at normal temperature and is used in sensitive switching devices where high reliability for making circuit is required. It has improved resistance to welding and transfer compared to pure gold. Because of its low electrical conductivity and low melting point it is limited to currents under d0.5 amperes.Information provided by CMW Inc.
Physical Properties Metric English Comments
Density 15.6 g/cc
0.564 lb/in³
Mechanical Properties Metric English Comments
Hardness, Rockwell 15T 61
61
annealed
81
81
cold worked
Tensile Strength, Ultimate 228 MPa
33000 psi
annealed
345 MPa
50000 psi
cold worked
Component Elements Properties Metric English Comments
Gold, Au 72 %
72 %
Nickel, Ni 1.8 %
1.8 %
Silver, Ag 26.2 %
26.2 %
Electrical Properties Metric English Comments
Electrical Resistivity 0.0000123 ohm-cm
0.0000123 ohm-cm
14 % IACS
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