Reliable CuNi2 Wire for Thermocouples and Low-Temperature Heating Applications

Our Reliable CuNi2 Wire is a high-performance material crafted for thermocouples, low-temperature heating elements, and precision electrical components. With a 2% nickel content, this copper-nickel alloy offers a perfect blend of low resistivity, thermal stability, and affordability. It’s a top choice for industries like HVAC, electronics, and automotive, where accurate temperature measurement and efficient heating are essential. Available in diameters from 0.01mm to 3mm, our CuNi2 wire is engineered to meet the tightest tolerances, delivering consistent quality for your projects.

This wire’s low resistivity—around 8 µΩ·cm at 20°C—makes it ideal for applications requiring efficient electrical performance without high costs. It offers good corrosion resistance for mild environments and can handle temperatures up to 250°C, making it a solid pick for low-temperature thermocouples and heating systems. We’ve fine-tuned our production process to ensure every wire meets the highest standards, giving you a product that performs reliably in demanding applications.

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CuNi2 stands out for its balance of performance and cost-efficiency. With 2% nickel, it has slightly higher resistivity than CuNi1 , making it versatile for thermocouples and heating elements, yet it’s more affordable than higher-nickel alloys like CuNi6 or Constantan 6J40. Its thermal conductivity (65 W/mK) ensures efficient heat transfer, which is critical for thermocouples and low-temperature heating systems. With a tensile strength of 220 MPa, it’s durable enough to withstand mechanical stress while keeping costs down.

The wire’s low temperature coefficient of resistance (TCR) ensures stable electrical properties in low-temperature environments, from -50°C to 250°C. This makes it perfect for thermocouples in HVAC systems or sensors in consumer electronics. Its good corrosion resistance holds up well in mild settings, like indoor electrical systems or automotive components, though it’s not designed for extreme corrosion like higher-nickel alloys. For projects needing reliable performance on a budget, CuNi2 is a top performer.

Parameter:

Properties Material	Resistivity 200c μΩ.m	Max working temperature (℃)	Tensile strength (Mpa)	Melting point (℃）	Density (g/cm3)	TCR *10-6/℃ (20-600℃）	EMF vs Cu (μV/℃） （0-100℃）
CuNi1	0.03	200	210	1085	8.9	＜100	-8
CuNi2	0.05	200	220	1090	8.9	＜120	-12
CuNi6	0.1	220	250	1095	8.9	＜60	-18
CuNi8	0.12	250	270	1097	8.9	＜57	-22
CuNi10	0.15	250	290	1100	8.9	＜50	-25
CuNi14	0.2	300	310	1115	8.9	＜30	-28
CuNi19	0.25	300	340	1135	8.9	＜25	-32
CuNi23	0.3	300	350	1150	8.9	＜16	-34
CuNi30	0.35	350	400	1170	8.9	＜10	-37
CuNi34	0.4	350	400	1180	8.9	0	-39
CuNi44	0.5	400	420	1200	8.9	＜-6	-43

Size Range
Wire	0.08-7.5mm
Ribbon	(0.05-0.35)*(0.5-6.0)mm
Strip	(0.50-2.5)*(5-180)mm
Rod	8-50mm

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The copper-nickel alloy market is growing steadily, driven by demand for reliable materials in HVAC, electronics, and automotive industries. Thermocouples and heating elements are seeing increased adoption as industries prioritize energy efficiency and precise temperature control. The global thermocouple market is projected to grow at a CAGR of around 5.5% through 2030, fueled by advancements in smart manufacturing, electric vehicles (EVs), and renewable energy systems.

CuNi2 wire fits perfectly into this landscape. Its low resistivity and thermal stability make it an economical choice for thermocouples and heating elements in applications that don’t require extreme corrosion resistance or high temperatures. The rise of smart home devices, such as thermostats and climate control systems, is boosting demand for affordable materials like CuNi2 for sensors and low-voltage components. Similarly, the growth of EVs and renewable energy systems is driving the need for reliable, cost-effective alloys for temperature monitoring.

Sustainability is a key trend shaping the industry. Companies are under pressure to use eco-friendly materials, and our CuNi2 wire delivers. Produced with energy-efficient processes, it’s also fully recyclable, helping you meet environmental goals without sacrificing performance. The trend toward miniaturization in electronics is another driver, with industries demanding thinner wires for compact designs. Our ability to produce CuNi2 wire as fine as 0.01mm positions us to meet this growing need.

Emerging technologies, like IoT-enabled sensors and smart grids, are increasing the demand for affordable, reliable alloys. These systems rely on materials that balance cost and performance, and CuNi2 is a perfect fit. As industries continue to innovate, the demand for low-resistance, high-precision alloys like CuNi2 will keep growing.

Applications of CuNi2 Wire

Our CuNi2 Wire is a versatile material with a wide range of applications. Here’s where it makes an impact:

• Thermocouples: Its stable thermal properties make it ideal for Type T and J thermocouples in HVAC systems, appliances, and low-temperature industrial processes.

• Low-Temperature Heating Elements: Used in heating cables for underfloor heating, electric blankets, and automotive systems, it ensures efficient heat transfer.

• Precision Sensors: Its consistent electrical properties are perfect for temperature and pressure sensors in consumer electronics and industrial automation.

• Automotive Components: From EV battery sensors to climate control systems, CuNi2 provides reliable performance in mild environments.

• HVAC Systems: The wire’s accuracy in temperature measurement makes it a staple in thermostats and climate control units.

• Renewable Energy: In solar and wind energy systems, it’s used in low-temperature sensors and electrical components that require cost-effective materials.

Its flexibility also makes it suitable for custom applications, like low-voltage resistors and conductive elements, where affordability and reliability are essential.

Comparison Table: CuNi2 vs. CuNi1 vs. CuNi6 vs. Constantan 6J40

Property	CuNi2	CuNi1	CuNi6	Constantan 6J40
Nickel Content (%)	2	1	6	40
Resistivity at 20°C (µΩ·cm)	8	5	15	49
Max Operating Temp (°C)	250	200	300	600
Thermal Conductivity (W/mK)	65	70	50	23
Tensile Strength (MPa)	220	200	250	420
Corrosion Resistance	Good	Good	Good	Excellent
Thermocouple Types	T, J	Limited use	T, J	T, J, E
Applications	Thermocouples, heating, resistors	Resistors, sensors	Thermocouples, heating	Precision resistors, thermocouples

We’re not just a supplier—we’re a leader in delivering high-quality CuNi2 Wire. Here’s why we stand out:

• Precision Manufacturing: Our advanced processes produce wire with tight tolerances, from 0.01mm to 3mm in diameter, ensuring consistent performance for your applications.

• Custom Solutions: We offer fully customizable wire sizes and configurations to meet your specific needs, whether for thermocouples, heating elements, or sensors.

• Rigorous Quality Control: Every batch undergoes extensive testing in our state-of-the-art labs, meeting ASTM and ISO9001 standards for chemical and physical properties.

• Global Expertise, Local Support: With over 40 years of experience, we export to more than 70 countries and provide dedicated support to ensure your projects succeed.

• Eco-Friendly Production: Our energy-efficient processes and recyclable materials help you meet sustainability goals without compromising quality.

• Fast Delivery: Our streamlined production and logistics ensure quick turnaround times, even for custom orders, keeping your projects on schedule.

Compared to others, our focus on precision, customization, and sustainability gives us a clear edge. We deliver a product that’s tailored to your needs and built to perform reliably in low-temperature applications.

Looking Forward

The future of CuNi2 Wire is promising. As industries like HVAC, electronics, and automotive continue to grow, the demand for cost-effective, high-performance alloys will rise. We’re committed to staying ahead, investing in R&D to enhance our wire’s properties and meet emerging demands. From developing finer wires for compact sensors to improving thermal stability for next-generation applications, we’re always innovating.

Our CuNi2 wire is a key component in the systems driving modern industries. From thermocouples in smart HVAC systems to heating elements in EVs, it’s a small but essential part of the bigger picture. We’re excited to support our customers in building efficient, reliable solutions for the future.

For more details, pls directly contact us.

About Us:

Our 12,000㎡ factory is equipped with complete capabilities for research, production, testing, and packaging. We strictly adhere to ISO 9001 standards in our production processes, with an annual output of 1,200 tons. This ensures that we meet both quantity and quality demands. Furthermore, all products undergo rigorous simulated environment testing including high temperature, high pressure, and corrosion tests before being dispatched, ensuring they meet customer specifications. 

For all our clients, we offer timely and multilingual after-sales support and technical consulting, helping you resolve any issues swiftly and efficiently.

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FAQs：

1. What is Reliable CuNi2 Wire used for?
   It’s used for thermocouples, low-temperature heating elements, and precision electrical components in industries like HVAC, electronics, and automotive.

2. Why is CuNi2 suitable for thermocouples?
   Its low resistivity and stable thermal properties ensure accurate temperature measurements in low-temperature environments.

3. Which industries benefit from CuNi2 Wire?
   HVAC, electronics, automotive, renewable energy, and industrial automation rely on it for thermocouples and heating applications.

4. How does CuNi2 compare to other copper-nickel alloys?
   With 2% nickel, it offers slightly higher resistivity than CuNi1 but is more cost-effective than CuNi6 or Constantan for low-temperature uses.

5. What are the temperature limits for CuNi2 Wire?
   It performs reliably from -50°C to 250°C, ideal for low-temperature thermocouple and heating applications.

6. Is CuNi2 resistant to corrosion?
   Yes, it provides good corrosion resistance in mild environments, such as indoor electronics or HVAC systems.

7. Can CuNi2 Wire be customized for specific projects?
   We offer customizable wire diameters, from 0.01mm to 3mm, tailored to meet your unique requirements.

8. What’s the lifespan of CuNi2 in thermocouple applications?
   With proper use, it delivers consistent performance for years in low-temperature, low-corrosion settings.