LEADING COPPER NICKEL 90/10 & 70/30 COLLAR MANUFACTURER & EXPORTER — ISO 9001:2015 CERTIFIED
Manufacturer, Exporter & Supplier of Copper-Nickel 90/10 & 70/30 Welding Neck Collar, Short & Long Weld Neck Collar, Stub End Collar, Short & Long Stub End Collar & Composite Flange
Complete range of Copper-Nickel Welding Neck Collars and Stub End Collars manufactured to ASME B16.9, MSS SP-43, MSS SP-75, ASTM B466, DIN 86037, EN 1092-1, JIS and ISO standards for marine, offshore, shipbuilding and desalination applications.
As a specialist Copper Nickel Stub End Manufacturer, Supplier and Exporter, Sunflex Metalloy produces seven standard configurations of Copper Nickel Welding Neck Collars, Copper Nickel Stub End Collars and Copper Nickel Composite Flanges in CuNi 90/10 (UNS C70600) and CuNi 70/30 (UNS C71500) grades, conforming to ASME B16.5, ASME B16.9, MSS SP-43, MSS SP-75, ASTM B466, DIN 86037, EN 1092-1, JIS and ISO standards. All collars are available as forged, seamless, welded or machined construction with full dimensional and material certification.
CuNi 90/10 & 70/30 welding neck collars for permanent, leak-resistant flange connections in marine piping, seawater cooling and offshore platform systems.
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Short pattern CuNi weld neck collars for compact, space-constrained flange assemblies in desalination plants, shipbuilding and offshore systems.
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Long pattern CuNi weld neck collars with an extended hub for reinforced weld joints in high-pressure marine, naval and subsea piping systems.
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CuNi stub end collars — Lap Joint and Van Stone type — for flexible flange connections in marine and offshore piping networks, reducing flange cost and improving maintenance access.
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Short pattern CuNi stub end collars for economical, compact lap joint connections in process plants, marine piping transitions and cooling water systems.
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Long pattern CuNi stub end collars for systems requiring frequent disassembly in shipbuilding, offshore oil & gas, desalination and power generation.
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Complete, ready-to-install Van Stone flange assembly combining a CuNi stub end with a loose carbon steel, stainless steel or CuNi backing flange.
View Full Specification →| Property | CuNi 90/10 (UNS C70600) | CuNi 70/30 (UNS C71500) |
|---|---|---|
| Nickel Content | 9 – 11% | 29 – 33% |
| Tensile Strength | 275 – 345 MPa | 380 – 480 MPa |
| Yield Strength | 105 MPa min | 170 MPa min |
| Elongation | 30% min | 30% min |
| Density | 8.94 g/cm³ | 8.95 g/cm³ |
| Corrosion Resistance | Excellent (seawater) | Superior (high-velocity seawater) |
| Cost | More economical | Higher (more Ni) |
| Typical Applications | Marine cooling, desalination, offshore | High-pressure, naval, subsea |
| EN Designation | CW352H / CuNi10Fe1Mn / 2.0872 | CW354H / CuNi30Mn1Fe / 2.0882 |
| Primary Standard | ASTM B466 / EN 12449 / DIN 86019 | ASTM B466 / EN 12449 / DIN 86019 |
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