LEADING COPPER NICKEL 90/10 & 70/30 PIPES, TUBES & CUNIFER BRAKE LINE COIL MANUFACTURER
Manufacturer, Exporter & Supplier of Copper-Nickel 90/10 & 70/30 Pipes, Tubes & CuNiFer Brake Line Coils
Explore our complete range of Copper-Nickel 90/10, 70/30 pipes & tubes and CuNiFer brake line coils — with full size charts, NPS/DN/OD dimension tables, schedule wall thickness, weight-per-metre data and dimensional tolerances — manufactured to ASTM, ASME, EN, DIN, ISO, JIS, BS and Military/Marine standards.
At Sunflex Metalloy Pvt. Ltd., every Copper-Nickel 90/10 (UNS C70600) and Copper-Nickel 70/30 (UNS C71500) pipe and tube is manufactured using advanced production technology, precision engineering, and stringent quality control procedures. Our manufacturing process is designed to deliver exceptional dimensional accuracy, superior mechanical strength, excellent corrosion resistance, and complete compliance with international standards for marine, offshore, desalination, power generation, heat exchanger, and industrial piping applications.
The process begins with carefully selected high-purity copper, nickel, iron, and manganese raw materials, which are melted in controlled induction furnaces to achieve precise chemical composition. The molten alloy is continuously cast into billets before undergoing hot extrusion to form seamless hollows. These hollows are then cold-drawn or pilgered through multiple reduction stages to obtain the required outside diameter, wall thickness, and dimensional tolerances. Depending on customer specifications, the tubes are bright annealed or solution annealed to achieve optimum mechanical properties, followed by straightening, pickling, cleaning, and precision finishing.
UNS C70600 | CW352H
Seamless & welded pipes/tubes for marine piping, condensers, desalination plants and seawater cooling systems. ASTM B466, B467, B111.
UNS C71500 | CW354H
High-strength, superior corrosion-resistant pipes/tubes for offshore platforms, naval vessels and high-velocity seawater applications. ASTM B466, B467.
90/10 CuNiFe Alloy
Corrosion-resistant Copper-Nickel-Iron brake & fuel line coils for passenger vehicles, commercial trucks and military vehicles.
| Property | CuNi 90/10 (C70600) | CuNi 70/30 (C71500) | CuNiFer (90/10 CuNiFe) |
|---|---|---|---|
| Typical Form | Seamless / Welded Pipe & Tube | Seamless / Welded Pipe & Tube | Coiled Seamless Tube |
| Size Range | 6mm OD – 1200mm NB | 6mm OD – 1200mm NB | 4.75mm – 12mm OD |
| Tensile Strength (Annealed) | 275 – 345 MPa | 365 – 415 MPa | 320 – 400 MPa |
| Max Seawater Velocity | ~3.5 – 4 m/s | ~4.5 – 5 m/s | Not applicable |
| Primary Standards | ASTM B466/B467/B111 | ASTM B466/B467/B111 | SAE J527, ISO 4038 |
| Typical Use | General marine & desal piping | High-velocity & naval piping | Automotive brake/fuel lines |
| Product | Form | Size Range | Grade / UNS | Primary Standards |
|---|---|---|---|---|
| Copper-Nickel 90/10 Pipe & Tube | Seamless & Welded | 6mm OD – 1200mm NB | C70600 / CW352H | ASTM B466 / B467 / B111 |
| Copper-Nickel 70/30 Pipe & Tube | Seamless & Welded | 6mm OD – 1200mm NB | C71500 / CW354H | ASTM B466 / B467 / B111 |
| CuNiFer Brake Line Coils | Coiled Seamless Tube | 4.75mm – 12mm OD | 90/10 CuNiFe | SAE J527 / ISO 4038 / DIN 1785 |
The table below lists standard nominal pipe sizes (NPS 1/2" to 8") with outside diameter and common wall-thickness schedules used for Copper Nickel Seamless Pipes and Copper Nickel Welded Pipes manufactured to ASTM B466 / ASME SB466 and ASTM B467 / ASME SB467. Approximate theoretical weight is calculated for Schedule 40 wall using nominal dimensions and a density of 8.94 g/cm³.
| NPS | DN | OD (mm) | OD (inch) | Sch 10S WT (mm) | Sch 40 WT (mm) | Sch 80 WT (mm) | Approx. Weight Sch 40 (kg/m) |
|---|---|---|---|---|---|---|---|
| 1/2" | DN15 | 21.3 | 0.840 | 1.65 | 2.77 | 3.73 | 1.44 |
| 3/4" | DN20 | 26.7 | 1.050 | 1.65 | 2.87 | 3.91 | 1.92 |
| 1" | DN25 | 33.4 | 1.315 | 1.65 | 3.38 | 4.55 | 2.85 |
| 1-1/4" | DN32 | 42.2 | 1.660 | 1.65 | 3.56 | 4.85 | 3.86 |
| 1-1/2" | DN40 | 48.3 | 1.900 | 1.65 | 3.68 | 5.08 | 4.61 |
| 2" | DN50 | 60.3 | 2.375 | 1.65 | 3.91 | 5.54 | 6.19 |
| 2-1/2" | DN65 | 73.0 | 2.875 | 2.11 | 5.16 | 7.01 | 9.83 |
| 3" | DN80 | 88.9 | 3.500 | 2.11 | 5.49 | 7.62 | 12.86 |
| 4" | DN100 | 114.3 | 4.500 | 2.11 | 6.02 | 8.56 | 18.31 |
| 5" | DN125 | 141.3 | 5.563 | 2.77 | 6.55 | 9.53 | 24.79 |
| 6" | DN150 | 168.3 | 6.625 | 2.77 | 7.11 | 10.97 | 32.19 |
| 8" | DN200 | 219.1 | 8.625 | 3.05 | 8.18 | 12.70 | 48.46 |
Beyond NPS 8", we manufacture Copper Nickel Large Diameter Pipes up to 1200mm NB for major marine and desalination piping headers. Wall thickness for these large-bore sizes is determined per project specification and class/society requirement.
Copper Nickel Heat Exchanger Pipes, Condenser Pipes and Boiler Pipes manufactured to ASTM B111 / ASME SB111 are commonly supplied in the following outside diameters, with wall thickness specified by Birmingham Wire Gauge (BWG):
| Tube OD | OD (mm) | Typical BWG Range | Wall Thickness Range (mm) |
|---|---|---|---|
| 3/8" | 9.52 | BWG 18 – 22 | 1.24 – 0.71 |
| 1/2" | 12.70 | BWG 16 – 22 | 1.65 – 0.71 |
| 5/8" | 15.88 | BWG 16 – 20 | 1.65 – 0.89 |
| 3/4" | 19.05 | BWG 14 – 20 | 2.11 – 0.89 |
| 1" | 25.40 | BWG 12 – 18 | 2.77 – 1.24 |
| OD (mm / inch) | Wall Thickness | Standard Coil Lengths |
|---|---|---|
| 4.75mm (3/16") | 0.5 – 0.71mm | 7.5m / 15m / 30m |
| 6.00mm (1/4") | 0.5 – 0.8mm | 7.5m / 15m / 30m |
| 8.00mm (5/16") | 0.6 – 0.9mm | 7.5m / 15m / 30m |
| 10.00mm (3/8") | 0.7 – 1.0mm | 7.5m / 15m / 30m |
| 12.00mm (1/2") | 0.8 – 1.0mm | 7.5m / 15m / 30m |
| Parameter | Seamless (ASTM B466) | Welded (ASTM B467) |
|---|---|---|
| Outside Diameter | ±0.4 – 0.8% of OD (size dependent) | Slightly wider for large-OD welded pipe |
| Wall Thickness | ±10% (typical, size dependent) | ±10 – 12.5% (typical, size dependent) |
| Length (cut-to-length) | As per purchase order, typically +10mm / -0mm | As per purchase order, typically +10mm / -0mm |
| Straightness | Controlled per ASTM B466 requirements | Controlled per ASTM B467 requirements, may require post-weld straightening |
| Ovality / Roundness | Very tight, controlled by draw process | Slightly wider, controlled by sizing rolls |
To get an accurate quotation as quickly as possible, please share the following details with our technical sales team:
NPS/DN or exact OD & wall thickness (or schedule) required.
ASTM, ASME, EN, DIN, ISO, JIS, BS or Military/Marine standard to be followed.
Seamless or welded; straight length, coil, or U-bend.
Standard mill length or custom cut-to-length requirement.
Plain end, beveled end, threaded, or flared (for brake/fuel line coils).
MTC per EN 10204 3.1/3.2, and any third-party inspection (TUV/SGS/BV/Lloyd's/ABS) requirement.
Send us your technical requirement and we will respond with a detailed quotation.
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