Copper-Nickel 70/30 Pipes for Marine & Industrial Use

KVN Steels manufacturer and supplier, designs and develops copper pipes using a robust equally blend of pure 70% copper and 30% nickel. These 70/30 grade pipes and tubes are further enhanced with iron and manganese to suit industrial applications, offering exceptional structural integrity and superior corrosion resistance in aggressive environments. These pipes and tubes are manufactured in a wide range of lengths, diameters, wall thicknesses, and end configurations—such as plain, beveled, and threaded—to suit diverse industry applications. Available in various forms including seamless, welded, ERW, and LSAW, they can be supplied in round, square, rectangular, and hydraulic shapes, with single or double random lengths based on customer needs.

We maintain a customer-focused approach, offering tailor-made solutions to meet unique operational requirements. Each product batch undergoes stringent testing and quality assurance procedures to ensure dimensional accuracy, metallurgical integrity, and surface finish. Our attention to detail and commitment to global quality standards have enabled us to supply Copper Nickel 70/30 Pipes & Tubes to key markets across India, and the key Middle Eastern markets including the UAE, Saudi Arabia, Kuwait, Qatar, Oman, Iran, and Iraq.

The packaging process is equally meticulous, with each pipe and tube securely capped, wrapped in polypropylene sheets, and bundled to protect against environmental damage during transit. This level of care ensures safe and corrosion-free delivery to clients across various sectors.

Technical Overview

Celebrated for its superior resilience in harsh marine and salt-laden conditions, the Copper Nickel 70/30 alloy (UNS C71500 / DIN 2.0882) stands out as a trusted material for corrosion resistance in demanding environments. The addition of nickel improves structural strength, while iron and manganese bolster resistance to pitting and erosion. This alloy demonstrates excellent mechanical properties, including high tensile strength, good yield strength, and outstanding elongation—making it ideal for high-performance and corrosive applications.

Pipes and tubes made from this alloy are easy to fabricate and weld, even in cold-working conditions, without requiring post-weld heat treatment. These materials are non-magnetic and display high thermal stability, which ensures optimal performance under fluctuating pressure and temperature conditions. Testing procedures for these products include hardness testing, chemical composition analysis, PMI (Positive Material Identification), microstructure examination, flaring and flattening tests, and pitting corrosion resistance assessments. All manufacturing is conducted in alignment with international standards such as ASTM B466, ASTM B467, ASME SB111, and ASME SB466.

The high-quality composition and dimensional precision of Copper Nickel 70/30 Pipes & Tubes make them a preferred choice for systems that demand long-term reliability, low maintenance, and operational efficiency.

Applications & Industry Use

70/30 Copper Nickel Pipes & Tubes from KVN are highly valued across industries exposed to harsh marine conditions, thanks to their outstanding performance against saltwater degradation and biological fouling. These properties make them particularly valuable in desalination plants, shipbuilding, offshore oil rigs, and heat exchanger systems exposed to seawater. In the energy sector, they are commonly used in power generation, including condenser and feedwater heater applications.

The chemical processing and petrochemical industries utilize these pipes in systems handling aggressive media, including brines and industrial effluents. Additionally, they are widely applied in pharmaceutical equipment, pulp and paper processing, gas processing units, and specialized equipment where cleanliness and corrosion resistance are essential.

Thanks to their durability, weldability, and mechanical strength, Copper Nickel 70/30 Pipes & Tubes serve as an essential component in modern industrial infrastructure, that helping industries across India, the UAE, KSA, Kuwait, Sultanate of Oman, Qatar, Iraq, and Iran maintain safe and efficient operations.

Copper Nickel 70/30 Pipes and Tubes Equivalent Grades

STANDARD	UNS	WNR.
Copper Nickel 70/30	C71500	2.0882

Copper Nickel 70/30 Seamless Pipes

Cupro Nickel 70/30 Seamless Pipes, UNS C71500 Seamless Pipes, DIN 2.0882 Seamless Pipes

Copper Nickel 70/30 Seamless Tubes

Cu-Ni 70/30 Seamless Tube, CuNi UNS C71500 Seamless Tubing, DIN 2.0882 Seamless Tubes

Copper Nickel 70/30 Welded Pipes

Cupro Nickel 70/30 Welded Pipes Supplier, UNS C71500 Welded Pipes, Cu-Ni DIN 2.0882 Welded Pipe

Copper Nickel 70/30 Welded Tubes

70/30 CuNi Welded Tubing, UNS C71500 Welded Tube, ASME SB111 Copper Nickel 70/30 Welded Tubing

Copper Nickel 70/30 ERW Pipes

Cupro Nickel 70/30 ERW Pipe Supplier, CuNi Alloy UNS C71500 ERW Pipes, Cu-Ni DIN 2.0882 ERW Pipe

Copper Nickel 70/30 ERW Tubes

UNS C71500 ERW Tube, DIN 2.0882 ERW Tubing, ASTM B111 Cupro Nickel 70/30 ERW Tubes, Cu-Ni 70/30 ERW Tubes

Specification :

ASTM B466, B467, B111 / ASME SB466, SB467, SB111

Standard :

ASTM, ASME and API

Size :

1/2" TO 6' IN OD & NB IN Various SWG & SCH

Outer Diameter :

4.00 to 22.00 mm

Wall Thickness :

Between 0.15mm and 1.50 mm

Type :

Seamless / ERW / Welded / Fabricated Pipes

Form :

Round, Square, Rectangular, Oval, Hydraulic Etc

Length :

Single Random, Double Random & Required Length

End :

Plain End, Beveled End, Treaded

Schedule :

SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS

Inspection, Test Reports :

Mill Test Certificates, EN 10204 3.1, Chemical Reports, Mechanical Reports, PMI Test Reports, Visual Inspection Reports, Third Party Inspection Reports, NABL Approved Lab Reports, Destructive Test Report, Non Destructive Test Reports

Packing :

Packed in Wooden Boxes, Plastic Bags, Steel Strips Bundled, or as per Customers Requests

Specials :

Sizes and Specifications other than above can be manufactured on request

Chemical Composition of Copper Nickel 70/30 Pipes & Tubes

Grade	Cu	Mn	Pb	Ni	Fe	Zn
Cu-Ni 70-30	65.0 min	1 max	.05 max	29-33	0.4-1.0	1 max

Mechanical Properties of Cu-Ni 70/30 Pipes and Tubing

Properties	Metric	Imperial
Tensile strength, ultimate	372-517 MPa	54000-75000 psi
Tensile strength, yield (depending on temper)	88.0-483 MPa	12800-70100 psi
Elongation at break (in 381 mm)	45.0%	45.0%
Charpy impact	107 J	78.9 ft-lb
Machinability (UNS C36000 (free-cutting brass) = 100%)	20%	20%
Shear modulus	57.0 GPa	8270 ksi
Poisson's ratio	0.34	0.34
Elastic modulus	150 GPa	21800 ksi