Shanghai, June 4, 2025 — TOBO Industrial (Shanghai) Co., Ltd., a globally recognized manufacturer and exporter of metal tubing solutions, has officially launched its new series of nickel copper alloy tubes specifically designed for use in cooling fin and heat exchanger systems. These 2mm thick CuNi 90/10 square and rectangular tubes, manufactured from C70600 and C71500 alloys, mark a significant advancement in both durability and thermal efficiency for industrial and marine cooling technologies.
The release reflects TOBO’s ongoing commitment to delivering reliable, high-performance tubing materials to meet the needs of demanding sectors such as power generation, shipbuilding, HVAC, petrochemicals, and renewable energy.
Premium Nickel Copper Alloys: C70600 and C71500
TOBO’s new product line leverages the distinct advantages of CuNi 90/10 (C70600) and CuNi 70/30 (C71500) alloys. Both are well-known in global engineering for their exceptional corrosion resistance, especially in marine and high-salinity environments.
C70600 (90% copper, 10% nickel) offers excellent resistance to seawater, biofouling, and erosion, making it ideal for condensers and seawater-cooled heat exchangers.
C71500 (70% copper, 30% nickel) provides even greater strength and resistance to aggressive media, including acids and high-velocity fluids.
Both alloys exhibit outstanding mechanical stability, ductility, and long-term resistance to dezincification, ensuring reliable performance in thermal and fluid systems that operate continuously under varying temperatures and pressures.
Precision Square and Rectangular Tubing for Enhanced Heat Transfer
Unlike traditional round pipes, TOBO’s square and rectangular CuNi tubes are specifically engineered to optimize contact surface area when integrated into cooling fins and heat exchanger systems. This configuration enhances heat dissipation and maximizes thermal exchange efficiency between fluids or gases.
The 2mm wall thickness strikes the perfect balance between structural strength and thermal conductivity. This ensures durability in high-stress installations while supporting fast and efficient heat transfer — a critical factor in cooling towers, chillers, and marine condensers.
These tubes are manufactured using precision extrusion and cold-drawing processes, resulting in exceptional dimensional tolerance, smooth internal surfaces, and reliable weldability.
Ideal for Cooling Fins and Industrial Heat Exchange Systems
The demand for high-efficiency cooling fins and compact heat exchangers is growing in sectors that prioritize space, weight, and energy conservation. TOBO’s CuNi square and rectangular tubes address these needs by offering:
Enhanced surface contact with metal fins and plates
Corrosion resistance against brine, sea mist, and industrial condensate
Stable performance in extreme temperature fluctuations
Easy integration into modular cooling systems and compact coil assemblies
TOBO’s engineering team has optimized the tube design to work seamlessly with aluminum or copper cooling fins through brazing, mechanical fastening, or expanded fitting techniques.
Applications Across Marine, Power, and Chemical Industries
These nickel copper alloy tubes are suited for a wide range of industrial applications, including:
Shipboard cooling systems and engine heat exchangers
Power station condensers and auxiliary cooling units
Oil refinery heat exchangers and sulfuric acid plants
HVAC coil systems in coastal or corrosive environments
Desalination plant piping and condensate recovery systems
Thanks to their non-magnetic properties, CuNi alloys are also used in naval vessels and offshore structures, where magnetic interference must be minimized.
Global Standards and Quality Assurance
TOBO’s CuNi 90/10 and 70/30 tubes are produced to international specifications, including:
ASTM B111 / B466 for seamless and welded copper-nickel tubes
EN 12451 / DIN 86019 for marine and industrial heat exchanger tubes
ASME SB111 / SB171 for pressure vessel applications
Each tube undergoes hydrostatic and eddy current testing, dimensional inspection, chemical analysis, and surface finish checks to ensure flawless performance in the field. Custom cutting, deburring, and end-finishing services are available to match project-specific requirements.
Supporting Green Energy and Sustainable Infrastructure
TOBO’s development of energy-efficient tubing materials aligns with global trends in sustainable infrastructure, where reducing thermal losses and maximizing material lifespan are increasingly vital. CuNi’s long service life and recyclability make it a smart choice for eco-conscious industries looking to reduce downtime and operational costs.
The new product line also supports the construction of modular and energy-saving cooling units used in solar farms, wind turbines, and data centers — sectors that demand compact, efficient, and corrosion-resistant cooling systems.
Conclusion
With the introduction of CuNi 90/10 and 70/30 (C70600/C71500) square and rectangular nickel copper tubes, TOBO once again demonstrates its leadership in advanced piping technology. These 2mm thick, high-performance tubes are designed to meet the challenges of modern thermal systems, offering robust, corrosion-resistant solutions for critical industrial operations.
Customers around the world now have access to one of the most reliable and efficient tube products for cooling fins, thanks to TOBO’s engineering expertise, global distribution network, and commitment to product excellence.