Strip Contacts, hearing aids, charging, and volume potentiometer – moderate nobility electrical contact alloy – lower cost than Pal 6
Industry Examples
Industrial, Non-Implantable Medical
Tempers
Annealed, Stress Relieved, Heat Treated
Available Forms
Fine Wire, Strip
Constant (Temper - Independent) Properties
Parameter
Value
Solidus, °F (°C)
1699 (926)
Liquidus, °F (°C)
1891 (1033)
Melting Range, °F (°C)
193 (107)
Density, dwt/in3 (g/cm3)
111 (10.50)
Electrical Resistivity, Ω-cmf (µΩ-cm)
105 (17.4)
Electrical Conductivity, %IACS
10
Temperature Coefficent of Resistance, /°F (/K)
1.5E-04 (2.8E-04)
Thermal Conductivity, Btu/hr-ft-°F (W/m-K)
24 (41)
Coefficient of Thermal Expansion, /°F (/K)
9.6E-06 (1.7E-05)
Parameter
Value
Thermal EMF vs. Pt, µV/°F (µV/°C)
4.2 (7.5)
Specific Heat Capacity, Btu/lb-°F (J/g-K)
0.07 (0.30)
Elastic Modulus, Msi (GPa)
17.3 (119)
Sheer Modulus, Msi (GPa)
6.39 (44.1)
Poisson's Ratio
0.350
Single Phase/Multiphase
Multiphase
Emissivity
0.226
Contact resistance (Cres), 30 gf, mΩ
6.5
Cres, oxidized 1,000h@150°C, 30 gf, mΩ
11
Cres, flowers of sulfur 720h@50°C, 30gf, mΩ
48
Annealed Properties
Material Tested: Fine
Parameter
Value
0.2% Offset Yield Strength, ksi (MPa)
80 (550)
Ultimate Tensile Strength, ksi (MPa)
102 (702)
Elongation to Failure, %
26
Parameter
Value
Knoop Microhardness, HK50
310
Vickers Microhardness, HV50
290
Stress Relaxation , % stress
82.8
Material Tested: Strip
Parameter
Value
0.2% Offset Yield Strength, ksi (MPa)
80 (550)
Ultimate Tensile Strength, ksi (MPa)
100 (686)
Elongation to Failure, %
18
Parameter
Value
Knoop Microhardness, HK50
210
Vickers Microhardness, HV50
190
Stress Relieved Properties
Material Tested: Fine Wire
Parameter
Value
0.2% Offset Yield Strength, ksi (MPa)
149 (1030)
Ultimate Tensile Strength, ksi (MPa)
154 (1060)
Elongation to Failure, %
2
Parameter
Value
Knoop Microhardness, HK50
285
Vickers Microhardness, HV50
275
Fatigue Performance, Cycles
9.9E+06
Material Tested: Strip
Parameter
Value
0.2% Offset Yield Strength, ksi (MPa)
126 (870)
Ultimate Tensile Strength, ksi (MPa)
131 (900)
Elongation to Failure, %
10
Parameter
Value
Knoop Microhardness, HK50
275
Vickers Microhardness, HV50
275
Bend Formability - Good Way, min. R/T
0.8
Bend Formability - Bad Way, min. R/T
3.8
Heat Treated
Material Tested: Fine Wire
Parameter
Value
0.2% Offset Yield Strength, ksi (MPa)
145 (1000)
Ultimate Tensile Strength, ksi (MPa)
162 (1120)
Elongation to Failure, %
8
Parameter
Value
Knoop Microhardness, HK50
300
Vickers Microhardness, HV50
295
Material Tested: Strip
Parameter
Value
0.2% Offset Yield Strength, ksi (MPa)
125 (860)
Ultimate Tensile Strength, ksi (MPa)
139 (960)
Elongation to Failure, %
4
Parameter
Value
Knoop Microhardness, HK50
300
Vickers Microhardness, HV50
295
Bend Formability - Good Way, min. R/T
0.8
Bend Formability - Bad Way, min. R/T
6.2
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