Ohmalloy Material Co.,Ltd
| Payment Terms | L/C, T/T, , Paypal |
| Supply Ability | 30000 KG per month |
| Delivery Time | 3-18 working days after payment confirmed |
| Packaging Details | Spool+paper case + wooden case/plastic packing+papre case+ wooden box outside(or customized) |
| Name | CuNi44 Constantan Flat Wire High Electrical Resistance |
| Material Type | CuNi44 |
| Resistivity | 0.49(at 20℃ (Ωmm2/m)) |
| Magnetic properties | Non-magnetic |
| Density (g/cm3) | 8.9 |
| Conductivity coefficient at 20℃ | 23WmK |
| Supply State | Wire /Strip/ Rod/foil |
| Brand Name | OHMALLOY |
| Model Number | SP-CuNi44 |
| Certification | ISO9001:2015 |
| Place of Origin | China |
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Product Specification
| Payment Terms | L/C, T/T, , Paypal | Supply Ability | 30000 KG per month |
| Delivery Time | 3-18 working days after payment confirmed | Packaging Details | Spool+paper case + wooden case/plastic packing+papre case+ wooden box outside(or customized) |
| Name | CuNi44 Constantan Flat Wire High Electrical Resistance | Material Type | CuNi44 |
| Resistivity | 0.49(at 20℃ (Ωmm2/m)) | Magnetic properties | Non-magnetic |
| Density (g/cm3) | 8.9 | Conductivity coefficient at 20℃ | 23WmK |
| Supply State | Wire /Strip/ Rod/foil | Brand Name | OHMALLOY |
| Model Number | SP-CuNi44 | Certification | ISO9001:2015 |
| Place of Origin | China | ||
| High Light | High Electrical Resistance Constantan Flat Wire ，Copper Based Alloys Flat Wire ，CuNi44 Copper Based Alloys Wire | ||
CuNi44 Constantan Flat Wire High Electrical Resistance
Constantan(OhmAlloy049.pdf)
(Common Name: CuNi44,.Cuprothal49, Alloy 294, Cuprothal 294, Alloy 49, CuNi 102, Cu-Ni 44, Konstantan, Constantan.)
OhmAlloy049 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.
Copper Nickel Alloy Production Standard(GB/T1234-95)
| Performance Brand | NC020 CuNi14 | NC025 CuNi19 | NC030 CuNi23 | NC035 CuNi30 | NC040 CuNi34 | NC050 CuNi44 | |
| Main Chemical Content％ | Ni | 14.2 | 19 | 23 | 30 | 34 | 44 |
| Mn | 0.3 | 0.5 | 0.5 | 1.0 | 1.0 | 1.0 | |
| Cu | Bal. | Bal. | Bal. | Bal. | Bal. | Bal. | |
| Element Max Working Temperature℃ | 300 | 300 | 300 | 350 | 350 | 400 | |
| Density g/cm3 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | 8.9 | |
| Resistivity Ωmm2/m, at 20℃ | 0.20±5％ | 0.25±5％ | 0.30±5％ | 0.35±5％ | 0.40±5％ | 0.49±5％ | |
| Temperature factor of resistivity 10-5/℃(200-600℃) | <38 | <25 | <16 | <10 | -0 | <-6 | |
| Melting Point ℃ | 1115 | 1135 | 1150 | 1170 | 1180 | 1280 | |
| Tensile Strength MPa | ≥310 | ≥340 | ≥350 | ≥400 | ≥400 | ≥420 | |
| Enlogation%(>1.0) | ≥25 | ≥25 | ≥25 | ≥25 | ≥25 | ≥25 | |
| EMF VS Copper V/℃(0-100℃) | -28 | -32 | -34 | -37 | -39 | -43 | |
| Specific heat capacity j/gk(20℃) | 0.38 | 0.38 | 0.38 | 0.39 | 0.40 | 0.41 | |
| Conductivity coefficient w/mk at20℃ | 48 | 38 | 33 | 27 | 25 | 23 | |
| Organizational attribute | Austenitic | Austenitic | Austenitic | Austenitic | Austenitic | Austenitic | |
| Magnetic | None-Magnetic | None-Magnetic | None-Magnetic | None-Magnetic | None-Magnetic | None-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 | |||
| OhmAlloy049 | good | good | good | good | bad | good | |
Style of supply
| Alloys Name | Type | Dimension | ||
| OhmAlloy049W | Wire | D=0.06mm~8mm | ||
| OhmAlloy049R | Ribbon | W=0.4~40 | T=0.05~2.9mm | |
| OhmAlloy049S | Strip | W=8~200mm | T=0.1~3.0 | |
| OhmAlloy049F | Foil | W=6~120mm | T=0.005~0.1 | |
| OhmAlloy049B | Bar | Dia=8~100mm | L=50~1000 | |
The addition of nickel to pure copper can significantly improve the strength, corrosion resistance, hardness, electrical resistance and thermoelectricity, and reduce the temperature coefficient of resistivity. Therefore, compared with other copper alloys, the mechanical and physical properties of cupronickel are extremely good, with good ductility, high hardness, beautiful color, corrosion resistance and deep drawing performance.
It is widely used as corrosion-resistant structural parts in shipbuilding, petroleum, chemical, construction, electric power, precision instruments, medical equipment, musical instruments and other departments. Some cupronickel has special electrical properties, which can be used to make resistance elements, thermocouple materials and compensation wires. Non-industrial cupronickel is mainly used to make decorative crafts.
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter,Trading Company
Year Established:
2008
Total Annual:
4000000-6000000
Employee Number:
20~50
Ecer Certification：
Verified Supplier
Ohmalloy Material Co.,Ltd is a high-tech enterprise which specialized in making all kinds of alloy such as high resistance alloy, low-resistance copper nickel alloy, precision alloy, FeCrAl alloy and thermocouple Alloy. Ohmalloy Material Co.,Ltd have a full production line from melting, surface... Ohmalloy Material Co.,Ltd is a high-tech enterprise which specialized in making all kinds of alloy such as high resistance alloy, low-resistance copper nickel alloy, precision alloy, FeCrAl alloy and thermocouple Alloy. Ohmalloy Material Co.,Ltd have a full production line from melting, surface...
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