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Copper Nickel Fin Tube

Copper nickel fin tube specifications What is a copper nickel fin tube (90/10 & 70/30)?

This unique tube, comprising copper and nickel, has fins on the inner or outer area to up the heat transfer by raising the surface area. A copper nickel fin tube has two variants: 90/10 & 70/30. Both provide corrosion resistance from seawater and several acids and inhibit microbial growth.

Cupro nickel fin tubes are perfect for long service duration amid high seawater velocities. These products allow buyers savings in material costs and volumes, which makes them attractive for air conditioning, coolers, superheaters, and engineering applications.

Manifest alloys is top 5 UNS C70600 fin tubes supplier of in India; please review the performance of Cupro Nickel Fin Tube

How does the performance of cupro nickel fin tubes maintain over time?

Impingement resistance makes these tubes ideal for marine applications. A cuni 70-30 fin tube can last ten years, but longevity varies by the environment and usage frequency. These tubes get strengthened through grain refinement procedures like precipitation. Clients maintain the tube and fin by periodic cleaning with specialized cleaners.


Specification of copper nickel fin tube

Specifications Size Wall Thickness
ASTM / ASME SB 111 9.52mm OD up to 25.40mm 1.21mm up to 2.77mm
Finning Tube temper Types
As per SB - 359 H58, soft annealed Fin tube, heat exchangers finned tubes, integral & external finned tubes, capillary tubes

We are pleased to provide cuni tube and fin & copper nickel extruded fin tubo in both 90/10 and 70/30 alloy ratios, which you can compare here

What is the difference between copper nickel 90/10 fin tube and 70/30 copper nickel fin tubes?

A 70/30 copper nickel fin tube has 70% copper and 30% nickel. It offers strength and excellent resistance to flow at high velocities.
Contrastingly, a 90 10 copper nickel fin tube comprises 90% copper and 10% nickel. It is cheaper and delivers lower performance. However, it is popular due to its affordability.

Types of cuni 70-30 fin tube


CUNI finned tubes

CUNI finned tubes

UNS C70600 Fin Tubes

UNS C70600 Fin Tubes

Cuni 90 10 Fin Tube

Cuni 90 10 Fin Tube

 Copper Nickel 70/30 Fin Tube

Copper Nickel 70/30 Fin Tube

We employ ndt testing methods to ensure the quality of our UNS C70600 fin tubing and rittling finned tubes

Which testing methods evaluate the properties of uns c70600 fin tubes?

Verifying the chemical composition and metallurgical properties of a uns c70600 fin tube is essential for optimum performance. Manufacturers perform non-destructive tests like hydrostatic and eddy current testing to identify structural defects. A rittling finned tube (components created by the zehnder rittling company) undergoes a pneumatic test, boroscopy, and destructive flattening and expansion.

Chemical composition of CUNI finned tubes


Grade Mn Cu Pb Fe Ni Zn
90/10 1.0 max 88.6 min 0.5 max 1.8 max 9-11 max 1 max
70/30 1 max 65.0 min 0.5 max 0.4-1.0 29-33 1 max
Our DIN 2.0872 fin tube and spiral fin tubes are available in both 90/10 and 70/30 compositions, providing maximum durability and corrosion resistance for HVAC

How do the composition of 90/10 and 70/30 alloys impact their durability and corrosion resistance for hvac applications?

A CUNI finned tubes gets employed in hvac applications (heating, ventilation, and air conditioning). The composition of alloys 90/10 and 70/30 in corporates iron and manganese. These additions improve durability by upping corrosion resistance.

Mechanical properties of copper nickel 90/10 fin tube


Grade Melting point Density Tensilestrength Elongation Yieldstrength(0.2%Offset)
90/10 2260°F 8.8g/cm3 50000 PSi 30% 20000PSi
70/30 2260°F 0.323 lb/in3 at 68°F 50000 PSi 30% 20000PSi
If you want to learn more about our 90 10 copper nickel fin thermal conductivity, visit Manifestalloys website and look at our cuni 90 10 fin tube weight charts

How can the weight of 90/10 copper nickel fin tubes be accurately calculated?

Buyers can calculate the weight of a copper nickel extruded fin tube to assess total project costs. The basic formula is cross-sectional area x length x density*
*8.94 g/cm3 for a din 2.0882 fin tube

Equivalent grade of copper nickel 70/30 finned tube


Grade UNS Werkstoff Nr.
90/10 C70600 2.0872
70/30 C71500 2.0882