LEADING COPPER NICKEL 90/10 & 70/30 COLLAR MANUFACTURER & EXPORTER — ISO 9001:2015 CERTIFIED
Manufacturer, Exporter & Supplier of Copper-Nickel 90/10 & 70/30 Long Stub End Collar — ASME B16.9 · MSS SP-75 · NAVSEA
Manufacturer & Exporter of Copper-Nickel Long Stub End Collars (Long Pattern / Extra Long Pattern Stub End) in CuNi 90/10 (UNS C70600) and CuNi 70/30 (UNS C71500) conforming to ASME B16.9, MSS SP-75, NAVSEA T9074, DEF STAN and NORSOK standards.
The Copper Nickel Long Stub End Collar — manufactured to ASME B16.9 long pattern and, for high-pressure applications, MSS SP-75 proportions — provides an extended face-to-toe length for applications demanding maximum weld joint integrity, greater tolerance to pipe misalignment during field erection, and enhanced fatigue resistance under cyclic pressure or vibration loading. Manufactured in CuNi 90/10 (UNS C70600) and CuNi 70/30 (UNS C71500), this configuration is the standard choice for high-pressure, high-reliability marine, naval and offshore piping systems.
Long pattern stub ends are extensively specified in shipbuilding and offshore oil & gas construction where full compliance with NAVSEA T9074, UK DEF STAN and NORSOK requirements is mandatory, as well as in desalination plants and power generation facilities where piping systems experience continuous thermal cycling and require robust, long-service-life flanged connections. The extended hub also simplifies field alignment and reduces the risk of weld-root stress concentration compared to shorter pattern alternatives.
Sunflex Metalloy manufactures every Copper Nickel Long Stub End Collar in-house — from certified CuNi billet through forging, CNC machining, and final inspection — with complete traceability and an EN 10204 3.1 Mill Test Certificate issued with every shipment, reinforcing our standing as a trusted Copper Nickel Stub End Manufacturer, Supplier and Exporter to shipyards, EPC contractors and offshore operators worldwide.
Material: CuNi 90/10 / CuNi 70/30
UNS: C70600 / C71500 / C70620 / C71640
EN: CW352H / CW354H
DIN: CuNi10Fe1Mn (2.0872) / CuNi30Mn1Fe (2.0882)
Standards: ASME B16.9 · MSS SP-75 · NAVSEA
Size: ½" (DN15) to 48" (DN1200) NB & Custom
Pattern: Long / Extra Long Pattern (ASME B16.9 / MSS SP-75)
Pressure: Class 150 to Class 2500
MTC: EN 10204 3.1 supplied
Request a Quote| Element | CuNi 90/10 — UNS C70600 (CW352H / CuNi10Fe1Mn) | CuNi 70/30 — UNS C71500 (CW354H / CuNi30Mn1Fe) |
|---|---|---|
| Copper (Cu) | Remainder (min 86.5%) | Remainder (min 65.0%) |
| Nickel + Cobalt (Ni + Co) | 9.0 – 11.0% | 29.0 – 33.0% |
| Iron (Fe) | 1.0 – 1.8% | 0.40 – 1.0% |
| Manganese (Mn) | 0.5 – 1.2% | 1.0% max |
| Lead (Pb) | 0.05% max | 0.02% max |
| Carbon (C) | 0.05% max | 0.05% max |
| Sulphur (S) | 0.02% max | 0.02% max |
| Zinc (Zn) | 1.0% max | 0.50% max |
| Property | CuNi 90/10 (UNS C70600) | CuNi 70/30 (UNS C71500) | Test Standard |
|---|---|---|---|
| Tensile Strength (UTS) | 275 MPa min (40 ksi) | 380 MPa min (55 ksi) | ASTM E8 / ISO 6892-1 |
| Yield Strength (0.2% PS) | 105 MPa min (15 ksi) | 170 MPa min (25 ksi) | ASTM E8 / ISO 6892-1 |
| Elongation (in 50 mm) | 30% min | 30% min | ASTM E8 / ISO 6892-1 |
| Hardness | 45 HRB max | 65 HRB max | ASTM E18 / ISO 6508 |
| Density | 8.94 g/cm³ | 8.95 g/cm³ | – |
| Modulus of Elasticity | 135 GPa | 150 GPa | – |
| Thermal Conductivity | 40 W/m·K | 29 W/m·K | – |
| Melting Point (Approx.) | 1100°C | 1170°C | – |
| NPS (inch) | DN | Hub O.D. (mm) | Flange Face O.D. (mm) | Overall Length (mm) | Min. Wall (mm) |
|---|---|---|---|---|---|
| 1/2" | DN15 | 21.3 | 90 | 38 | 1.65 |
| 3/4" | DN20 | 26.7 | 100 | 38 | 1.65 |
| 1" | DN25 | 33.4 | 110 | 51 | 1.65 |
| 1 1/2" | DN40 | 48.3 | 135 | 57 | 1.65 |
| 2" | DN50 | 60.3 | 150 | 64 | 1.65 |
| 3" | DN80 | 88.9 | 190 | 79 | 3.05 |
| 4" | DN100 | 114.3 | 230 | 90 | 3.05 |
| 6" | DN150 | 168.3 | 280 | 108 | 3.4 |
| 8" | DN200 | 219.1 | 345 | 121 | 3.76 |
| 10" | DN250 | 273.0 | 405 | 133 | 4.19 |
| 12" | DN300 | 323.9 | 485 | 146 | 4.57 |
| 16" | DN400 | 406.4 | 580 | 165 | 4.78 |
| 20" | DN500 | 508.0 | 715 | 187 | 5.54 |
| 24" | DN600 | 609.6 | 840 | 210 | 6.35 |
* Dimensions are indicative and manufactured to the purchaser's drawing / applicable standard (ASME B16.9, MSS SP-43, MSS SP-75, DIN 86037). Custom sizes, special wall thicknesses and non-standard face preparations manufactured on request. Full certified drawings issued on order confirmation.
Prime-grade CuNi 90/10 / CuNi 70/30 billet sourced from certified mills. Incoming chemical composition verified by PMI (XRF) and spectrochemical analysis before production.
Billet forged to the extended long-pattern / MSS SP-75 stub end profile, with controlled press cycles ensuring consistent grain flow through the full hub length for maximum joint reliability.
Long pattern blanks CNC-machined to precise bore, lap face diameter, radius and extended overall length, verified against ASME B16.9 / MSS SP-75 tolerance tables.
100% dimensional check, hydrostatic pressure test, spectrochemical chemical analysis, mechanical testing (tensile / hardness), visual inspection and PMI. EN 10204 3.1 MTC issued.
Long Pattern refers to the ASME B16.9 dimensional standard (and MSS SP-75 for high-pressure classes), which specifies an extended overall face-to-toe length compared to the MSS SP-43 short pattern — providing a longer, more gradual transition at the weld joint for improved fatigue and misalignment tolerance.
Long pattern stub ends are preferred for high-pressure Class 900 and above applications, naval and defence shipbuilding projects requiring NAVSEA T9074 or DEF STAN compliance, and any application subject to significant vibration or cyclic loading where the extended hub improves fatigue life.
Yes. The long pattern configuration is a common specification requirement on NORSOK M-630 compliant projects for the Norwegian Continental Shelf, and Sunflex Metalloy manufactures to NORSOK material and documentation requirements on request.
Every shipment includes an EN 10204 3.1 Mill Test Certificate covering chemical composition, mechanical properties, dimensional inspection and PMI results. 3.2 certificates and third-party witnessed inspection are available on request.
Share your size, grade (CuNi 90/10 / CuNi 70/30), applicable standard and quantity for a competitive quotation with EN 10204 3.1 MTC.
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