Low Resistance Alloy Constantan Foil
Constantan( Ualloy049)
(Common Name: CuNi45, NC50.Cuprothal, Alloy 294,
Cuprothal 294, Nico, MWS-294, Cupron, Copel, Alloy 45, Neutrology,
Advance, CuNi 102, Cu-Ni 44, Konstantan,constantan.)
Ualloy049 is a copper-nickel alloy (Cu56Ni44 alloy) characterized
by high electrical resistance, high ductility and good corrosion
resistance. It is suitable for use at temperatures up to
400°C
Typical applications for Ualloy049 are temperature-stable potentiometers, industrial rheostats and
electric motor starter resistances.
The combination of negligible temperature coefficient and high
resistivity makes the alloy particulary suitable for the winding of
precision resistors.
Ualloy049 is manufactured from electrolytic copper and pure nickel. In
finer wire sizes the alloy is designated as Ualloy049TC(Thermocouple).
Normal composition%
| Nickel | 45 | Manganese | 1 |
| Copper | Bal. | |
Typical Mechanical properties(1.0mm)
| Yield strength | Tensile Strength | Elongation |
| Mpa | Mpa | % |
| 250 | 420 | 25 |
| Coefficient of thermal expansion |
| Temperature | Thermal Expansion x10-6/K |
| 20 ºC- 400ºC | 15 |
| Specific heat capacity |
| Temperature | 20ºC |
| J/gK | 0.41 |
| Melting point (ºC) | 1280 |
| Max continuous operating temperature in air (ºC) | 400 |
| Magnetic properties | non-magnetic |
Corrosion resistance performance
Alloys |
Working In atmosphere at 20ºC | Working at max temperature 200ºC |
Air and oxygen contain
gases | gases with Nitrogen | gases with sulfur
oxidability | gases with sulfur
reductibility | carburization |
| OhmAlloy049 | good | good | good | good | bad | good |
Style of supply
| Alloys Name | Type | Dimension |
| Ualloy049W | Wire | D=0.03mm~8mm |
| Ualloy049R | Ribbon | W=0.4~40 | T=0.03~2.9mm |
| Ualloy049S | Strip | W=8~200mm | T=0.1~3.0 |
| Ualloy049F | Foil | W=6~120mm | T=0.003~0.1 |
| Ualloy049B | Bar | Dia=8~100mm | L=50~1000 |
The thermocouple alloy wires with different varieties and
specifications of our company can be applied in all kinds of
thermocouples, the temperature ranges from -270ºC to 1800ºC. The
thermocouple alloy wires have excellent performance and are
extensively used in the temperature measurement and control in
different fields, such as metallurgy, chemical industry, petroleum
industry, machinery-electric industry, energy industry, agriculture
and military industry. Our products conform to the standards of
