Properties of Paliney® 9

Paliney® 9 is an alloy with a chemical composition similar to that of Paliney® 7. It is basically a high palladium, silver alloy that also contains gold, platinum, and copper. The principal difference in composition is that Paliney® 9 does not contain zinc. It is used as a spring arm and contact in miniaturized relays where higher electrical energy levels are attained than are normally used with noble metal contacts. With the absence of zinc, Paliney® 9 does not age harden in the same manner as Paliney® 7. Therefore, its best spring characteristics are developed through cold drawing or work hardening followed by a stress-relieving operation. This produces wire that has sufficient ductility to permit forming and adequate strength to be used as a cantilever member. Paliney® 9 is used most often for low current make-and-break switching applications. However, its hardness does permit its use in sliding contact applications. The corrosion resistance of this alloy is similar to that of Paliney® 7.

View Properties Table

Properties of Paliney 9 Stress-Relieved
Resistivity, normal, ohm-cmf 220
Microhm cm 36.6
Density, grams/cc, nominal 11.9
Dwt./cu. in., nominal 125
Solidus Temperature  
F, nominal 1950
C, nominal 1065
Coefficient of Linear Expansion  
Modulus of Elasticity, psi, nominal 17x10(6)
Proportional Limit, psi, nominal 120,000
Ultimate Tensile Strength, psi  
Wire .005-.015 dia. 140,000-160,000*
Elongation, % in 2" 12 min
Knoop Hardness (100-gram load) 275-340*

The information contained in this Data Sheet is intended to assist you in the use of this product.  It is not intended to and does not create any warranties, express or implied, including any warranty of merchantability or fitness for a particular application.  The user should determine the suitability of this material for each application.  Data is subject to change without notice.

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