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Cu-Ni 70/30 ERW tubes are cold-formed and welded to ensure superior precision, strength, and uniformity. These tubes are highly resistant to pitting, crevice corrosion, and stress corrosion cracking, even in warm, saline environments. Commonly used in shipbuilding, offshore oil rigs, and desalination systems, ERW tubes provide reliable performance for heat exchangers, tube sheets, and piping assemblies. Manufactured according to ASTM B111 standards, they are available in various diameters, thicknesses, and custom lengths. The antimicrobial surface of Cu-Ni 70/30 ERW tubes also prevents bacterial growth, ensuring safe and hygienic applications.
Cu-Ni 70/30 rectangular pipes and tubes are perfect for industrial, marine, and desalination applications requiring precise dimensions and high corrosion resistance. Manufactured according to ASTM B111 and B466 standards, these tubes provide durability in seawater systems, power plants, and shipbuilding projects. Their antimicrobial surfaces prevent bacterial, viral, and fungal growth, making them suitable for hygienic systems. Customizable in size, shape, and thickness, Cu-Ni 70/30 rectangular tubes ensure efficient heat transfer, structural stability, and long-term reliability. These pipes and tubes are ideal for high-pressure seawater cooling, condensers, and other demanding industrial applications.
Cu-Ni 70/30 EFW Tubes
ASTM B111 Cupro Nickel 70/30 Pipe & Tubes Specification
Grades : Cu-Ni 70/30 (C71500)
Standards: ASTM, ASME and API
Specifications: ASTM / ASME SB 111 / 151 / 466
Size: 1/8″ TO 6” IN OD & NB IN 1/8” to 48”
Length: 3mm to 6000mm
Wall Thickness: 0.15mm and 8mm / Sch.5 to Sch. 160 & Sch. STD, Sch. XS, Sch. XXS
Type: Seamless / ERW / Welded / Fabricated / LSAW Pipes
Form: Round, Square, Rectangular, Hydraulic Etc.
Our Cupro Nickel C71500 Pipe & Tubes conforms to NACE MR0175/ISO 15156.
| Standard | WERKSTOFF NR. | UNS | MIL | SAE | JIS | BS | EN |
|---|---|---|---|---|---|---|---|
| Cu-Ni 70/30 | 2.0882 | C71500 | C-15726 | J461, J463 | - | CN-10-7 | CW-35-42H |
| Grade | Cu | Ni | Pb | Mn | Fe | Zn | P | S | N |
|---|---|---|---|---|---|---|---|---|---|
| Cu-Ni 70/30 | 65 Min. | 29.0 - 33.0 | 0.05 max | 1.0 max | 0.4 - 1.0 | 1.0 max | - | - | - |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2% offset) | Elongation |
|---|---|---|---|---|
| 0.323 lb/in³ at 68 °F | 2260 °F | 50,000 psi – 38 ksi | 20,000 psi – 15 ksi | 30 % |
Cu-Ni 70/30 EFW (electric fusion welded) tubes are designed for heavy-duty marine and industrial applications. These tubes combine excellent corrosion resistance with high mechanical strength, making them suitable for seawater piping, condensers, and heat exchangers. EFW tubes comply with ASTM B111 and B466 standards and are available in customized sizes to meet project-specific requirements. The addition of manganese and iron enhances durability under high-velocity water conditions. Their precision manufacturing ensures leak-free performance, long service life, and low maintenance costs. Cu-Ni 70/30 EFW tubes are widely used in shipbuilding, offshore platforms, and desalination plants.
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As your one-stop manufacturing partner, Sunrise Industries maintains a complete inventory of ready-to-sell raw materials alongside custom parts fabrication and full engineering services. From prototyping to production, we provide everything at a single location—serving all industrial sectors and transforming manufacturing value chains.
