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Johnson Matthey SW 850 Platinum w/ 15% Iridium Jewelry Alloy
Categories: Metal; Nonferrous Metal; Precious Metal; Platinum Alloy

Material Notes: Springs, watch backs. Copper, cobalt, gold, iridium, palladium and ruthenium alloy easily with platinum. The differences between the alloys reflect the hardening of the alloying element itself.

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Physical PropertiesOriginal ValueComments
Density 21.5 g/cc
 
Mechanical PropertiesOriginal ValueComments
Hardness, Vickers 160Annealed
Elongation at Break 15 %Annealed
 
Thermal PropertiesOriginal ValueComments
Melting Point 1800 - 1820 °C
Solidus 1800 °C
Liquidus 1820 °C
 
Component Elements PropertiesOriginal ValueComments
Iridium, Ir 15 %
Platinum, Pt 85 %

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NJMMJ66 / 97758

Specialty Compounds RTP Company

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