• An ISO 9001:2015 Certified Company
  • Call

    +91 9930108105

  • Address

    Sanghvi Galaxy, Shop No.2, Khetwadi
    10th Lane, Mumbai-400004, India

Copper Nickel Fin Tube

Copper nickel fin tube 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.


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.

Most Trusted UNS C70600 Spiral Fin Tube Manufacturer in India, View Specification Table

Specification of Copper Nickel Fin Tube


Supplier of Cuni Extruded Fin Tube in Variety of Sizes, Also Custom Option Available

Cuni 90/10 Low Fin Tube Size Chart


Products High finned tube
Fins /Inch 7 8 9
Nominal dia (mm) ID 15.88 22.23 22.23 15.88
Wall thickness 1.651 1.651 1.651 1.651
Finned section (mm) Actual ID 16.03 22.38 22.38 16.03
Wall thickness(Min.) 88 88 88 88
Fin dia (Min.) 1.549 1.549 1.549 1.549
Root dia (Min.) 19.05 25.4 25.4 19.05
Out surface area   (m2/m) 0.536 0.713 0.79 0.664
Surface area ratio out. To in. 10.62 10.13 11.24 13.18
Inside cross sectional area   (mm2) 201.7 393.5 393.2 201.7

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 UNS C70600 Finned 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

Get Copper Nickel 70/30 Straight Finned Tubes with 11 Fins Per Inch at Lowest Price in Mumbai

Cuni 70/30 Spiral Fin Tube Price Table


Size USD INR AED
OD X 2.00MM WT(AVG.) X 2305.00MM LENGTH Copper nickel Fin Tube $20.92 1745.60 INR 76.85 AED
19.05MM OD X 2.00MM WT(MIN) X 2205.00MM LENGTH Cuni 90/10 Low fin Tube $20.02 1671.21 INR 73.54 AED
19.05MM OD X 1.65.00MM WT(AVG.) X 2500.00MM LENGTH UNS C70600 Finnes tube $18.11 1511.03 INR 66.50 AED
Cunifer 70/30 Fin Tubes $20.99 1750.77 INR 77.00 AED
DIN 2.0872 LOW FIN TUBES $34.68 2893.30 INR 127.24 AED
19.05 MM OD X 2.00 MM WT X 2200.00 MM Cupro nickel 70/30 Low Finned Tube $17.62 1470.01 INR 64.76 AED

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.

Check Copper Nickel 90/10 Integral Fin Tubes Chemical Composition and Equivalent Properties Here

UNS C71500 Finned Tubes Chemical Composition



Cunifer 70/30 Extruded Fin Tube Equivalent Grade


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

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.

DIN 2.0872 Straight Finned Tubes Mechanical Properties


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

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

Refer UNS C71500 Crimped and Low Fin Tube Weight Chart and Delivery Time Table in North America

70/30 Cupro Nickel Fin Tube Delivery Schedules


Country Name Delivery Time
Denmark 40-50 days
Canada 60-70 days
Mexico 30-40 days
USA 45-60 days
Panama 40 days
Costa Rica 50 days

Cupro Nickel 90/10 Spiral Fin Tube Weight Chart


Copper Nickel Fin Tubes OD INS. 5/8 " 3/4 " 1"
MM 15.9 19.1 25.4
S.W.G 20 18 18
FIN S.W.G 28 28 28
APPROX. FINNED OD Tole + 1MM 1.10  29 1.26  32 1.42  36 1.54  39 1.73  44 1.77  45 1.97  49
Weight of Cuni fin Tube 48 FINS/FT 158 FINS/M Sq.FtSq.m /FT /M. 0.890.27 0.980.30 1.340.41 1.450.44 1.990.61 1.710.52 2.170.66
Kg/M 0.6 0.73 0.86 1.11 1.29 1.41 1.69
72 FINS/FT 237 FINS/M Sq.FtSq.m/FT /M. 1.270.38 1.410.43 1.890.58 2.090.64 2.880.88 2.470.75 3.120.95
Kg/M 0.75 0.89 1.1 1.37 1.64 1.71 2.05
60 FINS/FT 197 FINS/M Sq.FtSq.m / FT /M. 1.05  0.32 1.18  0.36 1.61  0.49 1.78  0.54 2.42  0.74 2.07  0.63 2.66  0.81
Kg/M 0.67 0.81 0.98 1.24 1.47 1.56 1.87
96 FINS/FT 316 FINS/M Sq.Ft Sq.m/FT /M. 1.640.50 1.840.56 2.490.76 2.730.83 3.761.15 3.190.97 4.081.24
Kg/M 0.89 1.07 1.34 1.63 1.99 2.01 2.41