Cupro Nickel Fittings
Cupro Nickel Fittings
What are cupro nickel fittings
90/10 Copper nickel (B10/C70600) is an alloy with 90% copper, 10% nickel plus tiny iron and manganese traces, widely adopted for marine seawater pipelines.
It excels at resisting seawater corrosion from chloride ions, stopping pitting, crevice, stress and flow erosion. Its corrosion rate in seawater is far lower than carbon steel and pure copper, and it avoids marine biofouling and scaling effectively.
The material balances great thermal conductivity, strength and ductility, with excellent hot/cold forming and welding performance. It works reliably under tough marine conditions and lasts 3–5 times longer than conventional pipes, bringing obvious economic advantages.
This alloy can be manufactured into full-series pipe fittings like elbows, tees, reducers, flanges and pipe caps, all customizable to match various pipe sizes and design standards for pipeline connection, transition and sealing.
The fittings serve ship seawater cooling, ballast, fire-fighting and delivery systems. They also fit offshore platform heat exchange, desalination pipelines, plus coastal power and marine refinery seawater circulation pipelines, acting as vital parts for corrosive marine piping systems.
90/10 Copper nickel chemical composition
KME CuNi90/10 | DIN 17664 2.0882 | BS 2871 CN102 | ASTM B466 C70600 | JIS H3300 C7060T | DIN 86019 2.1972 | EEMUA 234 UNS 7060X | GB/T 5231 BFe10-1.6-1 | |
Ni% | 10.0-11.0 | 9.0-11.0 | 10.0-11.0 | 9.0-11.0 | 9.0-11.0 | 9.0-11.0 | 10.0-11.0 | 9.0-11.0 |
Fe% | 1.5-1.8 | 1.0-2.0 | 1.0-2.0 | 1.0-1.8 | 1.0-1.8 | 1.5-1.8 | 1.5-2.0 | 1.5-1.8 |
Mn% | 0.6-1.0 | 0.5-1.0 | 0.5-1.0 | max.1.0 | 0.2-1.0 | 0.5-1.0 | 0.5-1.0 | 0.5-1.0 |
C% | max.0.05 | max.0.05 | max.0.05 | max.0.05 | max.0.05 | max.0.05 | max.0.05 | |
Pb% | max.0.01 | max.0.03 | max.0.01 | max.0.02 | max.0.05 | max.0.01 | max.0.01 | max.0.03 |
S% | max.0.005 | max.0.02 | max.0.05 | max.0.02 | max.0.005 | max.0.02 | max.0.01 | |
P% | max.0.02 | max.0.02 | max.0.02 | max.0.02 | max.0.02 | max.0.02 | ||
Zn% | max.0.05 | max.0.50 | max.0.50 | max.0.50 | max.0.05 | max.0.20 | max.0.20 | |
Other | max.0.20 | max.0.30 | max.0.20 | max.0.30 | max.0.40 | |||
Cu % | rem. | rem. | rem. | rem. | +Ni+Fe+Mn min99.5 | rem. | rem. | rem. |
Product show
Copper nickel tube
45/90°Short/long radius elbow
Copper nickel flanges
Equal/reducing tee
Copper pipe cap/coupling
Weldolet sockolet threadolet
Plug bushing
Cupro nickel fitting uses
Marine seawater cooling piping
Ballast water system
Marine fire-fighting seawater system
Daily seawater transport piping
Seawater lifting and transport pipeline fittings
Heat exchanger and condensation equipment piping and fittings
Offshore platform seawater desalination unit inlet and outlet water pipe fittings
Coastal power plant seawater circulation cooling system
Coastal oil refinery seawater transport and heat exchange pipelines
Coastal chemical plant seawater medium process piping
Other marine corrosion conditions
Our quality control
· Raw materials are verified via MTR and spectral composition & mechanical sampling tests.
· Real-time in-process inspection controls forming dimension and surface defects.
· Certified welders operate with dedicated wires; visual check and PT test inspect welds.
· Standard pickling & passivation ensures clean, uniform anti-corrosion surfaces.
· Finished goods pass hydraulic pressure and simulated seawater corrosion sampling tests.
· Full final recheck, batch marking and moisture-proof packaging support traceability.
· Complete inspection records are archived for customer audit.
Why choose us
· Full marine-grade production standard, specially engineered for ship, offshore platform and seawater pipeline systems.
· Complete official certification packages including MTR, PT, hydraulic test reports to meet vessel inspection requirements.
· Fully customizable: sizes, specifications and shapes like elbows, tees, flanges tailored to clients’ pipeline designs.
· Strict full-process QC to secure stable C70600 anti-corrosion performance for long-term marine service.
· Wide ready-made fitting range plus flexible custom processing to match diverse marine engineering demands.
· Professional export moisture-proof packaging and complete document support for global shipbuilding projects.
FAQs
1. What types of Copper Nickel 90/10 pipe fittings are available?
Common types include:
Elbows
Tees
Reducers
Couplings
Stub ends
End caps
Cross fittings
Flanges
Unions
Nipples
2. What standards are followed for Copper Nickel 90/10 fittings?
Common standards include:
ASTM B466 / B467
ASME SB466 / SB467
DIN 86019 / DIN 86028
EEMUA 146
MIL-T-16420
ANSI/ASME B16.9
BS EN 12449
3. What is the UNS number for Copper Nickel 90/10?
The common UNS designation is C70600 or CuNi 90/10.
4. Can Copper Nickel 90/10 pipe fittings be welded?
Yes. Copper Nickel 90/10 fittings are easily weldable using suitable welding methods such as:
TIG welding
MIG welding
Brazing
Soldering
5. What are the advantages of Copper Nickel 90/10 pipe fittings?
Key advantages include:
Excellent seawater corrosion resistance
Long service life
Good mechanical strength
Resistance to marine biofouling
Easy fabrication and welding
Low maintenance
Good thermal conductivity
6. Do your products come with a Mill Test Certificate?
A: Yes, all products come with an original manufacturer's material warranty certificate, which is shipped with the goods.
7. What information is needed when ordering Copper Nickel 90/10 fittings?
You should specify:
Fitting type
Size and schedule/thickness
Standard/specification
Pressure rating
Quantity
End connection type
Material grade/UNS number
Testing and certification requirements
8. Do you have other kind of materials?
Besides copper nickel pipe fittings, we also have aluminum pipe fittings.
