Properties of Paliney® 7

A superior alloy for demanding, low energy electrical contacts.Similar to Paliney 6, Paliney 7 is a Palladium, silver age-hardenable alloy that in addition contains 10% gold and 10% platinum. This alloy, with over 50 years of reliable service, is ideally suited for those extraordinarily demanding applications in which extremely long life and stable contact resistance (low noise) are critical. Paliney 7 features include high resistance to corrosion and tarnish while providing the mechanical properties of Beryllium Copper. Applications include, but are not limited to, guidance systems for military hardware, satellite communications, high-speed slip rings, and drug-delivery systems.  Paliney 7 meets ASTM Standard B540 for electrical contact alloys.

View Properties Table

Properties of Paliney 7 Annealed Stress-Relieved Ductile HT
(Age-Hardened)
Heat-Treated*
(Age-Hardened)
Resistivity, nominal, ohm-cmf 210 200 190 190
Modulus of Elasticity, psi, nominal, 17 x 106 17 x 106 17 x 106 17 x 106
microhm cm 34.9 33.2 31.6 31.6
Densitiy, nominal grams/cc, 11.8 11.8 11.8 11.8
Dwt./cu. in. 124.5 124.5 124.5 124.5
Solidus Temperature nominal F 1860 1860 1860 1860
Solidus Temperature nominal C 1015 1015 1015 1015
Coefficient  of Linear Expansion  -6    -6   
/ oF(70 - 212o F) nominal 7.5x10-6 7.5x10-6 7.5x10-6 7.5x10-6
/ oC (20 - 100o C) 13.5x10-6 13.5x10-6 13.5x10-6 13.5x10-6
Thermal emf vs. Platinum (0 - 100C), uv/C nominal -10 -9 -8 -8
Fatigue strength (rotating - bending) at 10(8) cycles, psi 50,000 50,000 50,000 50,000
Wire Properties        
Proportional Limit, psi, nominal 90,000 135,000 135,000 145,000
Ultimate Tensile Strength, psi        
.004 - .020 dia. 110,000-130,000 140,000-170,000 160,000-190,000 160,000-200,000
.021 - .060 dia. 105,000-130,000 130,000-170,000 155,000-180,000 160,000-200,000
Elongation, % in 2"        
.004 - .020 dia. 20 min. 10-20 8-18 1-10
.021 - .060 dia. 15 min. 8-25 8-25 1-10
Knoop Hardness (100-gram load)        
(50-gram under .005 thick)        
.004 - .020 dia. 200-260 280-340 320-370 350-410
.021 - .060 dia. 200-260 280-340 310-360 340-400
Vickers Hardness (100-gram load)        
(50-gram under .005 dia.)        
.004 - .020 dia. 190-250 265-340 320-380 330-400
.021 - .060 dia. 190-250 265-340 320-380 330-400
Strip and Rod Properties
.003" - .020"
       
UTS, ksi 110 - 135 135 - 160 150 - 180 160 - 200
Elongation, % in 2" 12 min 8 - 25 8 - 25 1 - 10
Knoop Hardness  200 - 260  280 - 340  300 - 360  340 - 400 
Vickers Hardness 185 - 255 265 - 340 320 - 380 330 - 400
Proportional Limit, psi 100,000 ----- 135,000 145,000
Ultimate Tensile Strength, psi 110,000 - 135,000 ----- 150,000 -185,000 160,000 -200,000

 

*Forming or bending is not recommended for this "temper" of alloy.

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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