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{"title":"Precision Permalloy Wire FeNi80Mo5 \/ High Initial Permeability Alloy Rod Low","imgUrl":"https:\/\/img.chinax.com\/nimg\/00\/15\/a14744cf5fa58adcb66f47efb750-200x200-1\/precision_permalloy_wire_feni80mo5_2f_high_initial_permeability_alloy_rod_low_coercivity.jpg","attrs":{"Brand Name":"Tankii","Model Number":"Mumetal","Certification":"Rosh, SGS","Place of Origin":"Shanghai"}}
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Constantan is one of the most widely used alloys due to its optimal combination of properties essential for strain gauge applications. It features the highest resistivity among comparable alloys, making it insensitive to strain levels and temperature variations. The exceptionally high resistivity enables suitable resistance levels even in very small grids, while maintaining a manageable temperature coefficient of resistance.
Constantan offers excellent fatigue life and high elongation capacity, making it highly useful for demanding applications. However, users should note that the alloy exhibits drift at temperatures around 65°C, which is critical when testing gauge stability strain at this temperature range.
Material Properties Comparison
Property
Cu
CuNi2
CuNi6
CuNi10
CuNi23Mn
CuNi44
Tensile Strength [N/mm²]
220-300
260-360
270-370
300-390
500-550
560-680
Yield Strength at 1% Elongation [N/mm²]
120-200
140-240
160-220
140-250
200-330
400-500
Bending Proof Performance [%]
100
160
760
Resistance (IACS) [%]
101
34
17
12
6
3
Conductivity [S*m/mm²]
58.5
20.0
10.0
6.7
3.33
2.0
Resistivity [Ohm*mm²/m]
0.0171
0.05
0.10
0.1493
0.30
0.50
Thermal Coefficient of Resistance [1E-6/K]
3900-4300
1100-1600
500-900
350-400
150-200
-80 - +40
Solderability
good
good
good
good
good
no conventional soldering
Constantan Applications
Temperature Measurement
Constantan is used in thermocouple formation with copper, iron, and chromel wires. It is particularly valuable in chromel-constantan and iron-constantan thermocouple configurations.
Heavy Duty Industrial Rheostats
Constantan serves as an ideal alloy for electric motor starter resistances and heavy-duty industrial rheostats. Its high specific heat resistance and excellent ductility meet critical specifications for these applications, often being formed into large-sized wires.
Wire Wound Precision Resistors
Constantan is extensively used in wire wound precision resistors, volume control devices, and temperature-stable potentiometers. Its negligible temperature coefficient and high resistance make it particularly attractive for these precision applications.
High Thermal E.M.F. Development
Constantan develops high thermal electromotive force against other metals, making it valuable in thermocouple alloys when paired with metals like iron and copper.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Exporter
Year Established:
1981
Total Annual:
8000000-100000000
Employee Number:
90~100
Ecer Certification：
Verified Supplier
Shanghai Tankii Alloy Material Co., Ltd.specialized in production of Resistance Heating Alloy, Nickel Chromium Alloy, Iron Chromium Aluminum Alloy, Nickel Aluminum Alloy, Manganin, Copper Nickel Alloy, thermocouple wire, pure nickel and other precision alloy materials in the form of round wire, ribb... Shanghai Tankii Alloy Material Co., Ltd.specialized in production of Resistance Heating Alloy, Nickel Chromium Alloy, Iron Chromium Aluminum Alloy, Nickel Aluminum Alloy, Manganin, Copper Nickel Alloy, thermocouple wire, pure nickel and other precision alloy materials in the form of round wire, ribb...
