Cupro Nickel 90/10 Pipe

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Metracore Alloys is a trusted manufacturer and supplier of cupro nickel 90/10 pipe fittings. We hydrostatically test every fitting before shipment so no marine order leaves without this critical safety check. Cupro Nickel 90/10 (UNS C70600) combines roughly 90% copper with 10% nickel plus a deliberate iron addition. Seawater system designers rely on this alloy because of its proven track record in naval and merchant fleets.

Biofouling control is the grade’s clearest working advantage. Copper ions released at the bore stop barnacles, mussels, and weed from settling, so flow capacity holds without chlorination or mechanical cleaning. Condenser and heat-exchanger circuits benefit twice over: heat moves readily through the fitting wall, and the surfaces doing the transfer stay clean.

Our production covers ten buttweld configurations from 1/2 to 24 inches nominal bore. Shipbuilders, desalination contractors, and coastal power plant operators place most of the orders we handle. Mail us your requirement sheet; firm rates follow the same day.

What Are Cupro Nickel 90/10 Pipe Fittings?

Cupro Nickel 90/10 Pipe Fittings are wrought copper-nickel components that join, redirect, branch, and close seawater pipelines. European practice designates the alloy CuNi10Fe1Mn; nickel sits between 9.0 and 11.0%, iron between 1.0 and 1.8%. Both additions strengthen the cuprous oxide film that keeps corrosion in check.

Thermal behaviour matters just as much in exchanger duty. Copper Nickel 90/10 Pipe Fittings conduct heat at about 40 W/m·K, well above austenitic stainless levels. Fabrication stays straightforward: bends form cold without cracking, and welds run with matching filler wire. Copper-nickel lines resist erosion at flow speeds up to 3.5 m/s, regularly lasting for decades.

Why Choose Metracore Alloys?

Six commitments shape how Metracore Alloys handles every copper-nickel order. Certified Cu-Ni 90/10 stock reaches production only after each heat is re-verified by PMI before forming begins. Forming, machining, and final inspection all run under one documented ISO-certified system. Custom sizes, schedules, and special end preparations are quoted alongside standard catalogue items, so buyers are not forced into stock dimensions. Inspection agencies appointed by buyers are free to attend tests. An MTC document goes out with every consignment. Export-grade packing and agreed despatch dates carry orders to buyers worldwide, whether the destination is a domestic yard or an overseas port.

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Table of Content

Cupro Nickel 90/10 Pipe Fittings Specifications

Below is a complete overview of our UNS C70600 pipe fittings, including material specifications, available dimensions, manufacturing processes, and included quality documentation.

Types of Cupro Nickel 90/10 Pipe Fittings

These are the types of fitting that make up the range of Cupro Nickel 90/10 Buttweld Pipe Fittings with ends bevelled for welding.

Reach out to Metracore Alloys for reliable Cupro Nickel 90/10 Pipe Fittings

Technical Details of Cupro Nickel 90/10 Pipe Fittings

Chemical Composition of Cupro Nickel 90/10 Pipe

Composition limits specified for the grade are mentioned below. Copper takes up the balance once nickel, iron, and the minor elements are deducted.

Element	Copper (Cu)	Nickel (Ni)	Iron (Fe)	Manganese (Mn)	Carbon (C)	Lead (Pb)	Zinc (Zn)
Limit (%)	86.5 min (balance)	9.0 – 11.0	1.0 – 1.8	1.00 max	0.050 max	0.05 max	1.0 max

Mechanical Properties of Cupro Nickel 90/10 Pipe

Minimum mechanical values for annealed material are tabulated here, along with the physical constants relevant to thermal and weight calculations.

Property	Tensile Strength	Yield Strength (0.5% extension)	Elongation	Hardness	Density	Thermal Conductivity
Value	275 MPa min (40 ksi)	105 MPa min (15 ksi)	30% min	72 HRB typical (drawn temper)	8.94 g/cm³	40 W/m·K at ambient (20°C)

Features & Benefits

The following characteristics explain why 90/10 Cupro Nickel Fittings hold their place in seawater specifications.

Seawater corrosion endurance arises as the nickel-iron modified oxide film matures within weeks of first immersion.
Marine organisms fail to attach; biofouling resistance comes from steady copper ion release at the bore.
Erosion-corrosion resistance covers every duty inside the velocity ceiling of 3.5 m/s.
Heat transfer at 40 W/m·K keeps condenser and exchanger surfaces productive.
Standard workshop welding kit handles the grade, with no post-weld heat treatment required afterwards.
Cleaning campaigns and internal coatings drop out of the maintenance plan.
Reliable long-term performance shows in condenser installations still operating after 30 years.
Ductility holds from sub-zero to elevated temperatures, suiting worldwide marine service.

Manufacturing Standards & Testing

Five standards frame production. Seamless feedstock conforms to ASTM B466, while plate for fabricated items follows ASTM B122. Dimensions answer to ASME B16.9 in the standard range, ASME B16.28 for tight-radius geometry, and MSS SP-43 across light-gauge corrosion-resistant types. Buyers ordering ASTM B466 Cupro Nickel 90/10 Pipe Fittings receive 3.1 certificates per EN 10204, traceable to the parent heat. Testing runs in a set sequence: PMI checks verify grade identity, hydrostatic pressure trials follow, dimensional inspection and visual scrutiny cover each piece, and mechanical tests on heat samples complete the dossier.

Manufacturing Process of Cupro Nickel 90/10 Pipe Fittings

Cupro Nickel 90/10 Pipe Fittings Application

Cu-Ni 90/10 pipe fittings serve eight primary industries, each relying on the alloy’s superior corrosion resistance and durability to meet its specific operational and demanding marine environment needs.

Exporter, Manufacturer & Supplier of Cupro Nickel 90/10 Pipe Fittings in various material and sizes.

FAQs

What Are Cupro Nickel 90/10 Pipe Fittings?

Cupro Nickel 90/10 Pipe Fittings are seawater piping connectors in UNS C70600, produced in buttweld form for ships and coastal plants.

What Are the Advantages of Cupro Nickel 90/10 over Stainless Steel Fittings?

Stainless grades pit and crevice-corrode in stagnant seawater; 90/10 resists both and adds biofouling control stainless steel can’t match.

Which Standards Are Followed for Cupro Nickel 90/10 Pipe Fittings?

Material complies with ASTM B466 and B122. Dimensional standards are ASME B16.9, B16.28, plus MSS SP-43, with 3.1 documentation per EN 10204.

Can You Provide Custom Sizes and Wall Thicknesses?

Yes. We form non-standard bore sizes, walls, and angles to customer drawings once our engineers confirm the geometry is producible.

Do You Provide Mill Test Certificates and Third-Party Inspection?

Yes, every order carries its own 3.1 mill certificate, and a buyer-nominated agency may attend testing at our premises.

What Makes Cupro Nickel 90/10 Resistant to Marine Corrosion?

A copper oxide surface film, strengthened by the alloy’s nickel and iron content, screens the metal from seawater and rebuilds itself after damage.

Do You Export Cupro Nickel 90/10 Pipe Fittings Worldwide?

Yes, consignments travel in export-rated crates with complete shipping documents, and despatch schedules are fixed before booking.