LEADING COPPER NICKEL 90/10 & 70/30 COLLAR MANUFACTURER & EXPORTER — ISO 9001:2015 CERTIFIED
Manufacturer, Exporter & Supplier of Copper-Nickel 90/10 & 70/30 Short Weld Neck Collar — MSS SP-43 · DIN 86037 · ASME B16.5
Manufacturer & Exporter of Copper-Nickel Short Weld Neck Collars (short pattern welding neck collar / short pattern stub end collar) in CuNi 90/10 (UNS C70600) and CuNi 70/30 (UNS C71500) conforming to DIN 86037 short pattern, MSS SP-43, ASME B16.5 and ASTM B466 standards.
The Copper Nickel Short Weld Neck Collar is a compact, short-pattern version of our standard welding neck collar, designed with a reduced hub length for installations where axial space is limited — such as tight equipment nozzles, skid-mounted piping, retrofit projects and congested engine-room or topside piping arrangements. Manufactured in CuNi 90/10 (UNS C70600) and CuNi 70/30 (UNS C71500), the short weld neck collar delivers the same corrosion resistance and weld integrity as the standard pattern in a smaller physical footprint.
Short pattern collars are manufactured broadly in line with MSS SP-43 short-pattern stub end proportions and DIN 86037 short-hub welding neck collar geometry, giving specifiers a cost-effective, lightweight option that reduces both material usage and installed weight — a key consideration in marine and offshore weight-sensitive applications. All short weld neck collars maintain full ASME B16.5 flange face compatibility for correct assembly with standard loose flanges.
Each Copper Nickel Short Weld Neck Collar is forged and precision CNC-machined in-house, with 100% dimensional inspection, PMI verification and an EN 10204 3.1 Mill Test Certificate issued with every shipment — supporting Sunflex Metalloy's position as a reliable Copper Nickel Collar Manufacturer, Supplier and Exporter to shipyards and EPC contractors worldwide.
Material: CuNi 90/10 / CuNi 70/30
UNS: C70600 / C71500 / C70620 / C71640
EN: CW352H / CW354H
DIN: CuNi10Fe1Mn (2.0872) / CuNi30Mn1Fe (2.0882)
Standards: MSS SP-43 · DIN 86037 · ASME B16.5
Size: ½" (DN15) to 48" (DN1200) NB & Custom
Pattern: Short Pattern (MSS SP-43 / DIN 86037 Short)
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 | 25 | 1.65 |
| 3/4" | DN20 | 26.7 | 100 | 25 | 1.65 |
| 1" | DN25 | 33.4 | 110 | 32 | 1.65 |
| 1 1/2" | DN40 | 48.3 | 135 | 35 | 1.65 |
| 2" | DN50 | 60.3 | 150 | 40 | 1.65 |
| 3" | DN80 | 88.9 | 190 | 48 | 3.05 |
| 4" | DN100 | 114.3 | 230 | 54 | 3.05 |
| 6" | DN150 | 168.3 | 280 | 64 | 3.4 |
| 8" | DN200 | 219.1 | 345 | 72 | 3.76 |
| 10" | DN250 | 273.0 | 405 | 79 | 4.19 |
| 12" | DN300 | 323.9 | 485 | 87 | 4.57 |
| 16" | DN400 | 406.4 | 580 | 98 | 4.78 |
| 20" | DN500 | 508.0 | 715 | 110 | 5.54 |
| 24" | DN600 | 609.6 | 840 | 124 | 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 a shorter collar blank profile, optimising material yield while maintaining the grain flow integrity required at the hub-to-flange transition and weld preparation area.
Short-pattern blanks CNC-machined to the reduced hub length, precise bore diameter and ASME B16.5-compatible flange face, ensuring full interchangeability with standard loose flanges.
100% dimensional check, hydrostatic pressure test, spectrochemical chemical analysis, mechanical testing (tensile / hardness), visual inspection and PMI. EN 10204 3.1 MTC issued.
Short Weld Neck Collars are specified when axial installation space is limited — for example, close to equipment nozzles, in compact skid piping, or in retrofit projects where pipe run length cannot be extended. The reduced hub length also saves material cost and weight compared to the long/standard pattern.
Yes. Short pattern collars maintain the same flange face diameter, bolt circle and raised-face dimensions as standard pattern collars per ASME B16.5, so they assemble correctly with standard loose backing flanges — only the hub/overall length is reduced.
Standard grades are CuNi 90/10 (UNS C70600 / CW352H / CuNi10Fe1Mn) and CuNi 70/30 (UNS C71500 / CW354H / CuNi30Mn1Fe). Special grades including C70620 and C71640 are available on request.
Short Weld Neck Collars are available from ½" NB (DN15) to 24" NB (DN600) as standard, with larger sizes up to 48" NB manufactured 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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