Premium Quality Copper Nickel CuNi19 Bar for Heat Exchangers

The CuNi19 34 bar is a premium-grade copper-nickel alloy designed for demanding industrial environments, particularly in heat exchanger applications. Its composition, containing between 19% and 34% nickel, provides an exceptional combination of mechanical strength, resistance to seawater corrosion, and stability under high thermal stress. For industries that require reliable and long-lasting materials, this alloy is a proven solution.

At DLX, we specialize in manufacturing CuNi19 34 bars to the highest quality standards. Our products are engineered to perform consistently across diverse environments, ensuring durability and cost-effectiveness for clients worldwide.

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Copper-nickel alloys have been a cornerstone of marine and industrial engineering for decades. With global industries increasingly relying on desalination, offshore oil extraction, and renewable energy infrastructure, the demand for CuNi19 34 has surged. Its unique properties make it indispensable in heat exchangers where seawater is used as a cooling medium.

As industries move toward sustainable energy and efficiency, the role of copper-nickel alloys has expanded. Heat exchangers in power plants, ships, and offshore installations rely on CuNi19 34 bars for their ability to withstand erosion, cavitation, and biofouling. Compared to stainless steel, which suffers localized corrosion in seawater, CuNi19 34 remains reliable over long service periods.

1. Heat Exchangers – Ensures efficient thermal conductivity and corrosion resistance, critical for power plants and desalination systems.

2. Marine Engineering – Applied in seawater piping systems, ship condensers, and cooling systems.

3. Offshore Oil and Gas – Used in components exposed to aggressive seawater environments.

4. Power Generation – Provides reliability in coastal power stations that require continuous seawater cooling.

5. Chemical Processing – Suitable for systems exposed to corrosive chemicals and seawater simultaneously.

The demand for CuNi19 34 bars is being fueled by two major global trends: the expansion of desalination plants to address water scarcity and the growth of offshore energy production. Additionally, military and commercial shipbuilding are increasingly specifying copper-nickel alloys for seawater systems because of their unmatched durability.

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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When compared with CuNi14, CuNi19 34 offers improved strength and corrosion resistance, making it more reliable for large-scale heat exchangers. CuNi34, with higher nickel content, excels in the harshest environments but comes at a higher cost. CuNi19 34 strikes the perfect balance between performance and economy, making it a preferred choice for industrial buyers.

Comparison Table

DLX is more than just a supplier; we are a trusted partner in copper-nickel solutions. Our CuNi19 34 bars are produced using advanced metallurgical processes that ensure consistent composition, superior surface finish, and precise dimensional accuracy.

We pride ourselves on offering tailored solutions, from custom sizes and tolerances to specific finishing requirements. Our technical team collaborates closely with clients to deliver products that integrate seamlessly into their operations.

Another key advantage is our robust logistics network. Large-scale industrial projects demand reliable and timely supply, and DLX ensures that clients receive materials on schedule, anywhere in the world. This reliability reduces project delays and enhances efficiency.

• In a coastal power plant, DLX supplied CuNi19 34 bars for heat exchanger systems. The result was enhanced performance, reduced downtime, and significant cost savings over time.

• In a major desalination project, our bars were used for seawater piping and condenser systems, ensuring consistent performance under continuous exposure to corrosive conditions.

With the rising global focus on renewable energy and sustainable water management, the importance of copper-nickel alloys will continue to grow. CuNi19 34 is poised to play a critical role in the expansion of desalination capacity and the modernization of marine infrastructure.

DLX is committed to innovation and continuous improvement. By investing in advanced manufacturing technologies and strict quality control, we ensure that our CuNi19 34 bars remain at the forefront of industry standards.

The CuNi19 34 bar is a premium material that combines corrosion resistance, mechanical strength, and cost efficiency, making it ideal for heat exchangers and other demanding industrial applications.

DLX delivers this product with unmatched quality and reliability, positioning ourselves as a trusted supplier for global industries. By choosing DLX, clients gain not only superior materials but also a partner dedicated to their long-term success.

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 CuNi19 34 bar made of?
   It is made of copper with approximately 19–34% nickel, providing excellent strength and corrosion resistance.

2. Why is CuNi19 34 bar used in heat exchangers?
   Because of its resistance to seawater corrosion, scaling, and biofouling, making it ideal for cooling water and thermal transfer systems.

3. Can CuNi19 34 bar handle high-velocity seawater?
   Yes, it resists erosion and cavitation in high-velocity seawater, ensuring long-term performance.

4. How does CuNi19 34 compare to CuNi14 and CuNi34?
   CuNi19 34 offers a balance of strength and corrosion resistance, stronger than CuNi14 and more economical than CuNi34.

5. Is CuNi19 34 easy to fabricate?
   Yes, it can be welded, machined, and shaped using standard industrial techniques.

6. What standards govern CuNi19 34 bars?
   They are produced under ASTM, EN, and DIN standards for copper-nickel alloys.

7. Which industries use CuNi19 34 most?
   Marine engineering, desalination plants, offshore oil and gas, power generation, and chemical industries.

8. Does CuNi19 34 bar reduce maintenance costs?
   Yes, its durability and resistance to corrosion lower the need for frequent replacements and repairs.