C71500: This is the UNS (Unified Numbering System) designation for a specific copper-nickel alloy containing 70% copper (Cu) and 30% nickel (Ni). This alloy is often referred to as 70/30 copper-nickel. The alloy provides good strength and formability, offering a balance between strength, ductility, and ease of fabrication. The material has good workability, allowing for easy bending, welding, and forming into required shapes, such as coils or complex tube arrays.

C71500 offers superior resistance to seawater and other harsh environments, making it ideal for marine applications, offshore platforms, and heat exchangers exposed to corrosive fluids like brine and seawater.

Chemical Composition:

Grade	Cu	Ni	Fe
ASTM B111 C71500	69-71%	29-33%	0.4-1.0%

Mechanical Properties:

Grade

Yield Strength

Tensile Strength

Elongation

ASTM B111 C71500

Approximately

125 MPa (18 ksi)

Approximately

350 MPa (51 ksi)

≥ 30%

Applications:

Seawater Cooling Systems
Desalination Plants
Cooling Systems for Marine Engines
Condensers and Heat Exchangers
Petrochemical Refining
Thermal Desalination Units
Reverse Osmosis Systems

ASTM B111 C71500 Copper Alloy Steel Heat Exchanger Tube , Cooling Systems 0

Ratings & Review

Overall Rating

3.7

Based on 50 reviews for this supplier

Rating Snapshot

The following is the distribution of all ratings

5 stars

4 stars

67%

3 stars

33%

2 stars

1 stars

All Reviews

Juan

Argentina Feb 18.2026

Helpful (2)

The finning is tight — you can tell they used a proper cold-forming process because the fins don't move at all when you try to wiggle them. We've had issues before with other suppliers where the fins would come loose after a few thermal cycles, but these ones feel solid.

J*o

Spain Oct 17.2025

Helpful (3)

Really good quality, the ASME SA249 standard is the real deal. I was worried about the fins getting crushed during the long trip, but the packaging was top-notch—not a single one was bent.

Rajesh Kumar

India Apr 19.2025

Helpful (3)

Cost and reliability are key for Indian refineries. We installed these fin tubes in Mumbai’s cooling towers, achieving 16% energy savings versus local suppliers. ASTM A213 T11 compliance ensured no failures during monsoon humidity (90%+ RH), and the low price saved $8K upfront.

Tags:

Studded Tube

Solid Fin Tube

Serrated Finned tube

Embedded G Fin Tube

Extruded Fin Tube

Wound Fin Tube

Low Fin Tube

Square Fin Tube

Longitudinal Finned Tube

Enhanced Heat Transfer Tube

Fin Tube Support

Return Bend

Heat Exchanger Tube

Stainless Steel Heat Exchanger Tube

Duplex Stainless Steel Heat Exchanger Tube

Super Duplex Stainless Steel Heat Exchanger Tube

Nickel Alloy Steel Heat Exchanger Tube

Copper Alloy Steel Heat Exchanger Tube

Titanium Alloy Steel Heat Exchanger Tube

Alloy Steel Heat Exchanger Tube

U Bend Heat Exchanger Tube

Carbon Steel Heat Exchanger Tubes

Boiler Tube

Nickel Alloy Steel Boiler Tube

Stainless Steel Boiler Tube

Duplex Stainless Steel Boiler Tube

Alloy Steel Boiler Tube

Carbon Steel Boiler Tube

Fired Heater Parts

Baffle Plate

Tubesheet

Studded Tube

Solid Fin Tube

Serrated Finned tube

Embedded G Fin Tube

Extruded Fin Tube

Wound Fin Tube

Low Fin Tube

Square Fin Tube

Longitudinal Finned Tube

Enhanced Heat Transfer Tube

Fin Tube Support

Return Bend

Heat Exchanger Tube

Stainless Steel Heat Exchanger Tube

Duplex Stainless Steel Heat Exchanger Tube

Super Duplex Stainless Steel Heat Exchanger Tube

Nickel Alloy Steel Heat Exchanger Tube

Copper Alloy Steel Heat Exchanger Tube

Titanium Alloy Steel Heat Exchanger Tube

Alloy Steel Heat Exchanger Tube

U Bend Heat Exchanger Tube

Carbon Steel Heat Exchanger Tubes

Boiler Tube

Nickel Alloy Steel Boiler Tube

Stainless Steel Boiler Tube

Duplex Stainless Steel Boiler Tube

Alloy Steel Boiler Tube

Carbon Steel Boiler Tube

Fired Heater Parts

Baffle Plate

Tubesheet

products details

Studded Tube

Solid Fin Tube

Serrated Finned tube

Embedded G Fin Tube

Extruded Fin Tube

Wound Fin Tube

Low Fin Tube

Square Fin Tube

Longitudinal Finned Tube

Enhanced Heat Transfer Tube

Fin Tube Support

Return Bend

Heat Exchanger Tube

Stainless Steel Heat Exchanger Tube

Duplex Stainless Steel Heat Exchanger Tube

Super Duplex Stainless Steel Heat Exchanger Tube

Nickel Alloy Steel Heat Exchanger Tube