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Ensinger PEI

Johnson Matthey Palladium w/ 5% Ruthenium+Gallium Jewelry Alloy
Categories: Metal; Nonferrous Metal; Precious Metal; Palladium Alloy

Material Notes: Ruthenium alloys well with palladium, but the as-cast hardness is lower than that of platinum/ruthenium. Additions of gallium correct this, and this tertiary alloy produces good casting results.

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Physical PropertiesMetricEnglishComments
Density 11.8 g/cc0.426 lb/in³
 
Mechanical PropertiesMetricEnglishComments
Hardness, Vickers 125125Annealed
Elongation at Break 35 %35 %Annealed
 
Thermal PropertiesMetricEnglishComments
Melting Point 1500 - 1521 °C2730 - 2770 °F
Solidus 1500 °C2730 °F
Liquidus 1521 °C2770 °F
 
Component Elements PropertiesMetricEnglishComments
Palladium, Pd 95 %95 %
Ruthenium, Ru 5 %5 %includes proprietary gallium addition

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