- Nickel alloys
- Thermocouple wire
Constantan - 2.0842 tape
AvekGlob company sells a constant-copper copper-nickel alloy constantan rod at the reasonable prices from the manufacturer (the nearest foreign analogue is alloy 2. 0842). The supplier guarantees the timely delivery of products to any address specified by the consumer.
Composition and application
Constantan (2.0842) refers to nonmagnetic copper alloys with austenite type nickel, in which the percentage ratios between these elements are due to the achievement of exact values of the temperature coefficient of resistivity. The alloy is widely used for foamed resistors and strain gauges if accurate temperature control of the operation modes of heating devices is necessary.
Constantan differs from a moderate resistivity and a low-temperature coefficient of resistance with a flat curve of the resistance versus temperature in a rather wide range than alloys — manganins. The alloy also exhibits good corrosion resistance, and is used primarily in alternating current circuits.
Tapes from constantan are usually a negative element of thermocouples, and only at cryogenic temperatures they are used as a positive contact. In the case of continuous operation, the nominal temperature of the constantan tape should not exceed 400 ° C.
The chemical composition of the constantan alloy (2.0842) is given in the table (numeric data — in percent):
|39… 44||Not more than 1.50||Not more than 0.5||Not more than 0,1||50… 53||rest|
The impurities may include cadmium, lead and chromium.
Buy under the competitive price a tape from constantana (alloy 2.0842) in the range of thickness and width offers the company AvecGlob. The supplier makes an operational shipment of products to any point. installed by the client.
Basic physical characteristics of the alloy:
Density, kg / m 3 — 8900;
Melting point, 0 С — 1280… 1300;
Coefficient of thermal conductivity, W / megade — 25;
Coefficient of thermal expansion, μm / deg — 15;
Modulus of elasticity, GPa — 165.
Basic mechanical characteristics of the alloy:
The limit of the temporary resistance, MPa −680… −1070;
Yield strength, MPa — 355… 540;
Relative elongation at tension,% — 2… 25;
Hardness according to Brinell, HB, no more than 155.
Constant tape is inexpedient to use for the manufacture of thermocouples with a high class of accuracy.
To buy at affordable prices from the manufacturer a strip of copper-nickel alloy constantan (alloy 2.0842) in a wide range of thickness and width offers the company AvekGlob. The supplier immediately delivers the rolled products to any point agreed by the customer.