Precision Resistance Constantan Wire For Relay , Copper Nickel Wire
OhmAlloy49(Resistance heating wire and resistance wire)
(Common Name:CuNi44,NC50.Cuprothal, Alloy 294, Cuprothal 294, Nico,
MWS-294, Cupron, Copel, Alloy 45, Neutrology, Advance, CuNi 102,
Cu-Ni 44, Konstantan,constantan.)
OhmAlloy49 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 OhmAlloy49 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.
OhmAlloy49 is manufactured from electrolytic copper and pure
nickel. In finer wire sizes the alloy is designated as
OhmAlloy49TC(Thermocouple).
Normal composition%
| Nickel | 44 | Manganese | 1 |
| Copper | Bal. | | |
Applicationg Photo:
Typical Mechanical properties(1.0mm)
| Yield strength | Tensile Strength | Elongation |
| Mpa | Mpa | % |
| 250 | 420 | 25
|
Typical Physical properties
| Density (g/cm3) | 8.9 |
| Electrical resistivity at 20℃ (Ωmm2/m) | 0.49 |
| Temperature factor of resistivity(20℃~600℃)X10-5/℃ | -6 |
| Conductivity coefficient at 20℃ (WmK) | 23 |
| EMF vs Cu(μV/℃ )(0~100℃ ) | -43 |
Coefficient of thermal expansion
|
| Temperature | Thermal Expansion x10-6/K |
| 20 ℃- 400℃ | 15 |
| Melting point (℃) | 1280 |
| Max continuous operating temperature in air (℃) | 400 |
| Magnetic properties | non-magnetic |
Corrosion resistance performance
| Alloys | Working In atmosphere at 20℃ | Working at max temperature 200℃ |
Air and oxygen contain
gases | gases with Nitrogen | gases with sulfur
oxidability | gases with sulfur
reductibility | carburization |
| OhmAlloy49 | good | good | good | good | bad | good |
Style of supply
| Alloys Name | Type | Dimension |
| OhmAlloy49W | Wire | D=0.03mm~8mm |
| OhmAlloy49R | Ribbon | W=0.4~40 | T=0.03~2.9mm |
| OhmAlloy49S | Strip | W=8~200mm | T=0.1~3.0 |
| OhmAlloy49F | Foil | W=6~120mm | T=0.003~0.1 |
| OhmAlloy49B | Bar | Dia=8~100mm | L=50~1000 |
FAQ
1. What's the minimum quantity customer can order?
If we have your size in stock, we can provide any quantity you
want.
If we do not have, for spool wire, we can produce 1 spool, about
2-3kg. For coil wire, 25kg.
2. How can you pay for small sample amount?
We have account, wire transfer for sample amount also ok.
3. Customer do not have express account. How will us arrange the
delivery for sample order?
Just need to provide your address information, we will check the
express cost, you can arrange the express cost together with sample
value.
4. What's our payment terms?
We can accept LC T/T payment terms, it also depending on delivery
and total amount. Let's talk more in details after getting your
detailed requirements.
5. Do you provide free samples?
If you want several meters and we have stock of your size, we can
provide, customer need to bear the International express cost.
