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 Stub End Collar — MSS SP-43 · ASTM B466
Manufacturer & Exporter of Copper-Nickel Short Stub End Collars (Short Pattern / Short Lap Joint Stub End) in CuNi 90/10 (UNS C70600) and CuNi 70/30 (UNS C71500) conforming to MSS SP-43, ASTM B466 and ASME B16.9 standards.
The Copper Nickel Short Stub End Collar — also referred to as a Short Pattern Stub End or Short Lap Joint Stub End — is manufactured to MSS SP-43 dimensional standards, offering a compact, economical alternative to the long pattern (ASME B16.9) stub end for applications where reduced face-to-face length and lower material weight are priorities. Available in CuNi 90/10 (UNS C70600) and CuNi 70/30 (UNS C71500), the short stub end collar is widely specified for smaller-bore process plant piping, marine piping transitions and cooling water systems.
Despite its reduced overall length, the Short Stub End Collar maintains the full lap face diameter and radius required for correct seating against a mating loose flange, ensuring reliable, leak-tight sealing performance identical to long pattern stub ends. This makes the short pattern an ideal choice wherever installation space is constrained but joint integrity cannot be compromised — a frequent requirement in retrofit and revamp projects on existing marine and offshore piping systems.
Every Copper Nickel Short Stub End Collar manufactured by Sunflex Metalloy is forged or machined from certified CuNi billet/pipe, 100% dimensionally inspected, and supplied with a complete EN 10204 3.1 Mill Test Certificate — supporting our reputation as a dependable Copper Nickel Stub End Manufacturer, Supplier and Exporter 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 · ASTM B466
Size: ½" (DN15) to 48" (DN1200) NB & Custom
Pattern: Short Pattern (MSS SP-43)
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 or pipe stock formed to the short-pattern stub end blank profile per MSS SP-43, optimising material yield while preserving full lap face geometry for reliable sealing.
Short pattern blanks CNC-machined to precise bore, lap face diameter, radius and reduced overall length, verified against MSS SP-43 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.
Short Pattern refers to the MSS SP-43 dimensional standard, which specifies a shorter overall face-to-toe length than the ASME B16.9 long pattern stub end, while retaining the same lap face diameter and sealing performance — resulting in a lighter, more economical fitting for space-constrained installations.
Yes. Both short and long pattern stub ends use the same CuNi 90/10 or CuNi 70/30 material and lap face design; the shorter overall length does not compromise sealing performance or pressure rating, provided the correct schedule/wall thickness is specified.
Standard sizes range from ½" NB (DN15) to 24" NB (DN600), with custom sizes manufactured on request.
Yes. All Short Stub End Collars are supplied with EN 10204 3.1 Mill Test Certificates as standard, with 3.2 certificates and third-party witness inspection (Lloyd's Register, DNV, ABS, Bureau Veritas) available on request for naval and offshore projects.
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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