Precision Forged Copper-Nickel Fittings for Corrosion-Critical Piping
Sunflex Metalloy manufactures CuNi 90/10 and 70/30 socket weld, threaded and branch outlet forged fittings engineered to ASME B16.11 and MSS SP standards — trusted across marine, offshore, desalination and power piping systems.
Engineered for Corrosion-Critical Service
Since 2010, Sunflex Metalloy has specialized exclusively in copper-nickel forged fittings — giving us metallurgical and process depth that general fittings manufacturers can't match.
15+ Years of Forging Expertise
Established in 2010 and focused solely on copper-nickel alloys, with process controls refined across thousands of production heats.
Dual-Grade Specialization
Full production capability across CuNi 90/10 (UNS C70600) and 70/30 (UNS C71500) for every fitting in our range.
Marine & Offshore Proven
Fittings supplied into seawater piping, shipbuilding and offshore platforms where chloride resistance is non-negotiable.
Standards Compliant
Manufactured to ASME B16.11 and MSS SP-79/83/95/97 with NPT, BSPT & BSPP threading options.
Full Test Traceability
Heat-wise material certification, dimensional inspection and NDT reporting on every dispatched batch.
Five Core Industries
Serving marine, offshore oil & gas, power generation, desalination and chemical processing plants worldwide.
CuNi 90/10 vs. CuNi 70/30 – Material Comparison
Both Copper-Nickel grades are available across our complete range of forged fittings. The selection depends on seawater conditions, flow velocity and required mechanical strength.
| Parameter | CuNi 90/10 (UNS C70600) | CuNi 70/30 (UNS C71500) |
|---|---|---|
| Nominal Composition | 88–90% Cu, 10–11% Ni, 1.0–1.8% Fe, 1.0% Mn max | 65–69% Cu, 29–33% Ni, 0.4–1.0% Fe, 1.0% Mn max |
| Equivalent Standards | EN CuNi10Fe1Mn, DIN 2.0872, JIS C7060 | EN CuNi30Fe2Mn2, DIN 2.0882, JIS C7150 |
| Tensile Strength (Approx.) | 275–345 MPa | 380–480 MPa |
| Seawater Flow Velocity | Up to ~3.5 m/s | Up to ~4.5–5 m/s |
| Typical Applications | General seawater piping, condensers, ballast systems | High-velocity lines, offshore risers, desalination plants |
| Relative Cost | Lower nickel content – Cost effective | Higher strength & corrosion resistance – Premium grade |
Full chemical analysis, mechanical test reports and EN 10204 3.1 Mill Test Certificates are available upon request.
Featured Forged Fittings
A cross-section of our socket weld, threaded, branch outlet and specialty CuNi fittings — all available in 90/10 and 70/30 grades.
90° Elbow
Classes 3000/6000/9000 · ASME B16.11
Equal Tee (NPT/BSP)
Classes 2000/3000/6000 · MSS SP-114
Weldolet
MSS SP-97 · All pressure classes
45° Elbow
Changes pipe direction by 45°
Full Coupling
Classes 3000/6000/9000 · ASME B16.11
Hex Bushing
NPT/BSPT · Reducing fitting
Instrument Tee
Instrumentation & gauge connections
Union
Classes 3000/6000 · ASME B16.11
Industries We Serve
Marine & Shipbuilding
Offshore Oil & Gas
Power Generation
Desalination Plants
Chemical Processing
What Piping Contractors Say
"Sunflex's 90/10 socket weld fittings have held up well across our seawater cooling retrofit projects, and their mill certs are always in order for class survey."
— Piping Procurement Lead, Marine EPC Contractor"We switched to Sunflex for our desalination line branch outlets after dimensional issues with a previous supplier. Consistent quality since."
— Project Manager, Desalination Equipment Supplier
Need a Technical Drawing or a Custom Forged Fitting?
Send us your specification or drawing — our engineering team responds with pricing and lead time within 24-48 hours.