CuNi40 Constantan Copper Based Alloys 25% Elongation High
Resistance 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. | | |
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 |
| Specific heat capacity |
| Temperature | 20℃ |
| J/gK | 0.41 |
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 |
constantan wire :CuNi44, CuNi40, CuNi30, CuNi23,CuNI19,CuNi10,
CuNi6, CuNi4, CuNi2, CuNi1
size:10.0mm-0.03mm
ISO9001, ROHs
constantan wire :CuNi44, CuNi40, CuNi30, CuNi23,CuNI19,CuNi10,
CuNi6, CuNi4, CuNi2, CuNi1
size:10.0mm-0.03mm
ISO9001, ROHS ,REACH
PACKING;COIL AND CARTON
DELIVERY TIME: 15-20 DAYS
| main property | type | CuNi1 | CuNi2 | CuNi6 | CuNi8 | CuMN3 | CuNi10 | CuNi14 | CuNi19 | CuNi23 | CuNi30 | CuNi34 | CuNi44 |
| main chemical composition | Ni | 1 | 2 | 6 | 8 | / | 10 | 14.2 | 19 | 23 | 30 | 34 | 44 |
| Mn | / | / | / | / | 3 | / | 0.3 | 0.5 | 0.5 | 1.0 | 1.0 | 1.0 |
| Cu | rest | rest | rest | rest | rest | rest | rest | rest | rest | rest | rest | rest |
working temperature °c | 200 | 200 | 220 | 250 | 200 | 250 | 300 | 300 | 300 | 350 | 350 | 400 |
| temperature coefficient of resistance | <100 | <120 | <60 | <57 | <38 | <50 | <38 | <25 | <16 | <10 | -0 | <-6 |
| °c | 1085 | 1090 | 1095 | 1097 | 1050 | 1100 | 1115 | 1135 | 1150 | 1170 | 1180 | 1280 |
| tensile mpa | >210 | >220 | >250 | >270 | >290 | >290 | >310 | >340 | >350 | >400 | >400 | >420 |
| elongation% | >25 | >25 | >25 | >25 | >25 | >25 | >25 | >25 | >25 | >25 | >25 | >25 |
| resistivity | 0.03±10% | 0.05±10% | 0.10±10% | 0.12±10% | 0.12±10% | 0.15±10% | 0.20 ± 5% | 0.25 ± 5% | 0.30 ± 5% | 0.35± 5% | 0.40 ± 5% | 0.49 ± 5% |
| density g/cm3 | 8.9 | 8.9 | 8.9 | 8.9 | 8.8 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 |
| conductivity | 145 | 130 | 92 | 75 | 84 | 59 | 48 | 38 | 33 | 27 | 25 | 23
|
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 |
