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 also contains 10% gold and 10% platinum. This alloy, with over 50 years of reliable service, is ideally suited for those demanding applications in which extremely long life, stable contact resistance, and low electrical noise are critical. Paliney 7 features include high resistance to corrosion and tarnish while providing the mechanical properties of beryllium copper. Applications include 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 |
1976 |
1976 |
1976 |
1976 |
|
Solidus Temperature nominal C |
1080 |
1080 |
1080 |
1080 |
|
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.
