Robust CuNi8 Copper-Nickel Wire for Precision Resistors and Sensors

Our Robust CuNi8 Copper-Nickel Wire is a high-performance material designed for precision resistors, sensors, and thermocouples. With an 8% nickel content, this alloy delivers a perfect balance of medium resistivity, strong corrosion resistance, and thermal stability. It’s a top pick for industries like electronics, automotive, and industrial automation, where reliability in challenging environments is crucial. Available in diameters from 0.01mm to 3mm, our CuNi8 wire is crafted with precision to meet the tightest tolerances, ensuring consistent quality for your projects.

The wire’s resistivity—around 20 µΩ·cm at 20°C—makes it ideal for applications requiring accurate electrical performance, like precision resistors and sensors. It offers very good corrosion resistance, handling moderately harsh environments with ease, and operates reliably up to 350°C. We’ve fine-tuned our manufacturing process to deliver a wire that’s durable, reliable, and ready to tackle the toughest applications, from industrial sensors to automotive systems.

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CuNi8 is a standout for its versatility and performance. Its 8% nickel content gives it higher resistivity than CuNi2 or CuNi6, making it perfect for precision resistors and sensors that need a bit more electrical resistance. Compared to high-nickel alloys like Constantan 6J40, it’s more cost-effective, offering similar durability at a lower price point. Its thermal conductivity (45 W/mK) ensures efficient heat transfer, critical for sensors and thermocouples, while its tensile strength (260 MPa) provides durability under mechanical stress.

The wire’s low temperature coefficient of resistance (TCR) keeps electrical properties stable from -50°C to 350°C, making it ideal for medium-temperature applications. Its very good corrosion resistance shines in moderately harsh environments, like industrial settings or automotive systems exposed to moisture or mild chemicals. For projects needing reliable performance in challenging conditions without breaking the bank, CuNi8 is a top choice.

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 thriving, driven by growing demand for durable materials in electronics, automotive, and industrial automation. Sensors and precision resistors are seeing increased adoption as industries embrace IoT, automation, and energy-efficient systems. The global sensor market is projected to grow at a CAGR of around 6.5% through 2030, fueled by advancements in smart manufacturing, electric vehicles (EVs), and renewable energy technologies.

CuNi8 wire is perfectly positioned in this landscape. Its medium resistivity and strong corrosion resistance make it ideal for sensors and resistors in moderately harsh environments, like industrial automation or automotive systems. The rise of EVs and renewable energy systems, such as solar and wind, is boosting demand for reliable alloys that can handle moisture and temperature fluctuations. Meanwhile, the push for precision in smart manufacturing is driving the need for high-performance sensor materials, where CuNi8 excels.

Sustainability is a key trend shaping the industry. Companies are seeking eco-friendly materials to meet environmental regulations, and our CuNi8 wire delivers. Produced with energy-efficient processes, it’s fully recyclable, helping you achieve green goals without sacrificing quality. The trend toward miniaturization in electronics is another driver, with industries demanding thinner wires for compact sensor designs. Our ability to produce CuNi8 wire as fine as 0.01mm keeps us ahead of the game.

Emerging technologies, like IoT-enabled sensors and smart grids, are increasing the demand for durable, cost-effective alloys. These systems require materials that maintain accuracy in challenging conditions, and CuNi8 is up to the task. As industries continue to innovate, the demand for high-performance alloys like CuNi8 will keep growing.

Applications of CuNi8 Copper-Nickel Wire

Our CuNi8 wire is a versatile material with a wide range of applications. Here’s where it makes an impact:

• Precision Resistors: Its medium resistivity and stable electrical properties make it ideal for resistors in automotive, telecommunications, and industrial equipment.

• Industrial Sensors: CuNi8’s corrosion resistance is perfect for temperature and pressure sensors in industrial automation, marine, and chemical processing systems.

• Thermocouples: It’s used in Type T and J thermocouples for accurate temperature measurement in industrial processes and HVAC systems.

• Automotive Systems: From EV battery sensors to climate control units, CuNi8 ensures reliable performance in moderately corrosive environments.

• Renewable Energy: In solar and wind energy systems, it’s used in sensors and electrical components that require durability in outdoor conditions.

• HVAC Systems: Its accuracy and corrosion resistance make it a staple in sensors for thermostats and climate control units.

Its flexibility also makes it suitable for custom applications, like low-voltage circuit breakers and conductive elements, where corrosion resistance and reliability are key.

Comparison Table: CuNi8 vs. CuNi6 vs. CuNi2 vs. Constantan 6J40

Property	CuNi8	CuNi6	CuNi2	Constantan 6J40
Nickel Content (%)	8	6	2	40
Resistivity at 20°C (µΩ·cm)	20	15	8	49
Max Operating Temp (°C)	350	300	250	600
Thermal Conductivity (W/mK)	45	50	65	23
Tensile Strength (MPa)	260	250	220	420
Corrosion Resistance	Very Good	Good	Good	Excellent
Applications	Resistors, sensors, thermocouples	Thermocouples, resistors	Resistors, heating	Precision resistors, thermocouples
Cost Efficiency	High	High	Very High	Moderate

We’re not just a supplier—we’re a leader in delivering high-quality CuNi8 Copper-Nickel Wire. Here’s why we stand out:

• Precision Manufacturing: Our advanced processes produce wires 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 resistors, sensors, or thermocouples.

• 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 in demanding environments.

Looking Forward

The future of CuNi8 Copper-Nickel Wire is bright. As industries like electronics, automotive, and renewable energy continue to grow, the demand for corrosion-resistant, high-performance alloys will soar. We’re committed to staying ahead, investing in R&D to enhance our wire’s properties and meet emerging challenges. From developing finer wires for compact sensors to improving corrosion resistance for next-generation applications, we’re always innovating.

Our CuNi8 wire is a critical component in the systems driving modern industries. From sensors in industrial automation to resistors in EV systems, it’s a small but essential part of the bigger picture. We’re excited to support our customers in building reliable, sustainable 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 Robust CuNi8 Copper-Nickel Wire used for?
   It’s used for precision resistors, sensors, and thermocouples in industries like electronics, automotive, and industrial automation.

2. Why is CuNi8 ideal for precision resistors and sensors?
   Its medium resistivity and excellent corrosion resistance ensure accurate and reliable performance in demanding applications.

3. Which industries rely on CuNi8 Wire?
   Electronics, automotive, renewable energy, HVAC, and industrial automation use it for resistors, sensors, and thermocouples.

4. How does CuNi8 compare to other copper-nickel alloys?
   With 8% nickel, it offers higher resistivity and better corrosion resistance than CuNi2 or CuNi6, but is more cost-effective than Constantan.

5. What are the temperature limits for CuNi8 Wire?
   It operates reliably from -50°C to 350°C, suitable for medium-temperature sensor and resistor applications.

6. Is CuNi8 resistant to corrosion?
   Yes, it provides very good corrosion resistance, especially in moderately harsh environments like industrial or automotive settings.

7. Can CuNi8 Wire be customized for specific projects?
   We offer customizable wire diameters, from 0.01mm to 3mm, tailored to meet your project requirements.

8. What’s the lifespan of CuNi8 in sensor applications?
   With proper use, it delivers consistent performance for years in moderately corrosive environments.