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CMW® ELKONIUM 302 platinum based alloy

Category Metal , Nonferrous Metal , Precious Metal , Platinum Alloy
Manufacturer CMW Inc.
Trade Name ELKONIUM
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
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Material Notes:
Platinum has complete freedom from atmospheric corrosion and is preferred for devices that have low closed forces and where surety of making a circuit may be a problem. It has a high melting point (1769(C) and good resistance to forming arcs. Low electrical conductivity (15% IACS) limits its application to low currents, usually below 5 amperes. Because of the high cost of the platinum ELKONIUM alloys, they are almost always supplied as composite contacts with thin facings of the ELKONIUM metal (silver brazed to nickel plated steel backings in the form of rivets, screws and weld buttons).ELKONIUM® 302 is the trademark used by CMW for an alloy of platinum, palladium and ruthenium. It has characteristics similar to ELKONIUM 34 alloy. It is more economical than platinum-ruthenium alloys because the less expensive palladium metal replaces some of the platinum. Its tarnish resistance is essentially the same as CMW's ELKONIUM 34 alloy. It is used in sensitive low voltage applications. It is also used as a positive contact operating with a tungsten negative contact in DC applications such as voltage regulators and motor speed governorsInformation provided by CMW Inc.
Physical Properties Metric English Comments
Density 17.8 g/cc
0.643 lb/in³
Mechanical Properties Metric English Comments
Hardness, Rockwell 15T 90
90
annealed
92
92
cold worked
Tensile Strength, Ultimate 517 MPa
75000 psi
annealed
862 MPa
125000 psi
cold worked
Elongation at Break 2.0 %
2.0 %
cold worked
12 %
12 %
annealed
Component Elements Properties Metric English Comments
Palladium, Pd 18.4 %
18.4 %
Platinum, Pt 74.4 %
74.4 %
Ruthenium, Ru 8.2 %
8.2 %
Electrical Properties Metric English Comments
Electrical Resistivity 0.0000430 ohm-cm
0.0000430 ohm-cm
4 % IACS
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