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Thermocouple copel wire CuNi40


Grade analogue W. Nr. Aisi Uns En Order
MNMts40-1.5 CuNi40 Buy from stock, view availability
MNMts43-1.5 2.0842 C72150 CuNi44 Buy from stock, view availability
MNMts40-1.5 Buy from stock, view availability

Alloy composition

Copel is a cupronickel thermocouple alloy that consists of nickel (43−44%), ferrum (2−3%) and manganese (0,5%.). A residual portion constitutes cuprum. This alloy is similar to analogous alloy — constantan.

Percentage composition of copel thermocouple CuNi43

A grade CuNi44 is the most common alloy. It can be delivered in a form of wire (Ø 0,10 — 11,5 mm), rod (Ø 12,0 — 100,0 mm) and strip (0,1−5,0 mm of thickness and 3−600 mm of widths).

Percentage composition of copel thermocouple CuNi40

C Fe Ni+Co Si Impurities Cu Mn
≤ 0.1 ≤ 0.15 42.5 — 44 ≤ 0.1 0.6 54.4 — 57.4

0.1 — 1


It has a high corrosive resistance and heat resistance. An alloy is capable of withstanding a heating up 800 ° C without a loss of the main properties. Maximum thermo-electromotive force appears in combination with cuprum, ferrum, chromel. In this condition, a coefficient of thermal real resistance is quite poor. Such properties are typical only to this alloy.

Physical features

A density is 8,9 g/cm³, a melting point is 1290 °C. An annealing can be done at a temperature of 800−850°C, and a hot working at 1150 °C. A coefficient of unit-area resistance is 0,5 Ohm-mm2/m; a linear expansion is 14·10−6/°C. At a temperature of 100 °C a thermoelectromotive force equals to 6,95 V and at 600 °C, it rises to 49,0 V.

Number Material Grade Size (mm) Rolles stock type Price
1 copel copel thermocouple CuNi40 Ø 0,1−11,5 wire contractual
2 ---«---

copel thermocouple CuNi40

Ø 12,0−100,0 bar contractual
3 ---«--- copel thermocouple CuNi40 3х600 mm strip



It is commonly used in pyrometry more often in a form of wire (Ø 0,2 — 3,2 mm), less often in a form of strip, rod for manufacturing thermocouples, heating controllers, compensating lead wires. The thermocouple consists of electric conductor fumes, that are soldered in one end and placed into environment oriented for thermometry («hot junction»). Then, exposed ends are going to be placed into a thermostatic regulator (so-called cold junction). Thanks to alloyage, thermocouple of this kind can stand a short-term effect of temperature up 1300 °C and work in an aggressive environment.

In therms of thermal emf, number one is thermocouple copel-chromel that is used durably at temperatures up 800 °C; number two is cuprum-copel, and then in descending order is copel-ferrum (up to 760°C). Compensating lead wires carry out a transfer of thermoelectromotive force to a measuring device. For such wires is used cheaper wire. Copel, constantan are utilized in measuring electrical gauge for manufacturing the resistance standards.

Physical characteristics at a temperature 20 °C

Property Magnitude
Hardness, soft alloy HB 10 -1 90 MPa
Melting point: 1285°C
Hardness, hard alloy HB 10 -1 195 MPa
Annealing temperature 850°C
Hot working temperature


Copel thermocouple supplier

«Auremo» supplier offers to make purchases by wholesale. There is a wide rage of half-finished goods in stock. There is an affordable price from copel thermocouple supplier. You can easily buy it right now. Copel thermocouple price is privileged for wholesale customers.

Buy copel thermocouple at a bargain price

«Auremo» supplier implements thermocouples throughout European market by wholesale. Terms of delivery take a minimum of time. You can buy copel thermocouple at a bargain price. We are working with experienced managers; they are experts of modern marketing and can help to buy copel thermocouple of any grade. The introduced goods in stock are certified. «Auremo» company is a profitable copel thermocouple supplier in this segment. A quality complies with GOST (all-Union State Standards) and International Standards. A price depends order quantity, additional conditions of supply. Copel thermocouple price is privileged for wholesale customers. «Auremo» company offers to make purchases by wholesale. There is an affordable copel thermocouple price from a supplier. You can easily buy it right now.