ASTM B111 C71500 Copper Nickel Tubes
GNEE – Your Trusted Global Manufacturer of Top-Tier Copper-Nickel Alloy C70600. We specialize in precision-engineered copper-nickel alloys, including C70600 (Cu-Ni 90/10) and C71500 (Cu-Ni 70/30). These alloys are renowned for their superior corrosion and erosion resistance in seawater, excellent antifouling properties (especially C70600), and high strength, making them indispensable components in harsh marine environments and demanding heat exchange systems.
Our copper-nickel products are meticulously manufactured in a variety of forms, including pipes, fittings, flanges, bars, and plates, designed to withstand harsh environments such as seawater, brackish water, and high-velocity fluids. With a large inventory, we are one of the world's largest multi-grade copper-nickel alloy stockpilers, ensuring immediate fulfillment of urgent industrial needs worldwide. All products offer complete material traceability through Material Traceability Certificates (MTCs) conforming to EN 10204 3.1, demonstrating our position as a leading materials supplier in critical industrial service sectors.
Copper Nickel C70600 / C71500 Products
Superior Seawater Corrosion Resistance: Unrivaled resistance to various forms of corrosion in marine environments, ensuring long service life for critical components.
Excellent Erosion & Impingement Resistance: Maintains integrity under high-velocity fluid flows, crucial for piping and heat exchanger applications.
Natural Biofouling Resistance: Especially 90/10 Cu-Ni (C70600) resists the attachment of marine organisms, reducing cleaning and maintenance costs.
Good Strength & Ductility: Offers a robust combination of mechanical strength and flexibility, facilitating fabrication and ensuring durability under stress.
Thermal Stability: Maintains mechanical properties over a range of temperatures, suitable for heat exchangers and condensers.
Ease of Fabrication & Joining: Excellent formability and weldability, allowing for complex designs and reliable connections.
Full Material Traceability & Certifications: Each product comes with comprehensive documentation, including EN 10204 3.1 MTCs, ensuring transparency, material verification, and compliance with international standards.
Longevity & Reduced Maintenance: The inherent durability and resistance to degradation lead to extended operational lifespans and lower overall lifecycle costs in demanding applications.
Copper Nickel Alloy C70600 & C71500
Forms of Copper Nickel C70600 / C71500 Available:
Pipes & Tubes:
Seamless and welded pipes and tubes for heat exchangers, condensers, piping systems, and desalination plants.
Pipe Fittings:
Butt-weld fittings (elbows, tees, reducers, caps), Threaded fittings, and Socket Weld fittings for comprehensive piping system solutions.
Bars & Rods:
Round, square, flat, and hexagonal bars for shafts, fasteners, and general machining.
Sheets & Plates:
Hot rolled and cold rolled sheets and plates for tank fabrication, structural components, and heat exchanger plates.
General Dimensions & Technical Capabilities for Cu-Ni Products:
Pipes & Tubes: NPS 1/8 to NPS 48, various schedules and wall thicknesses (Seamless and Welded).
Fittings: NPS 1/2 to NPS 48, various pressure ratings (Class 150 to Class 2500 for flanges, Class 3000 to 9000 for forged fittings).
Flanges: NPS 1/2 to NPS 60, Pressure Classes 150 to 2500, various facing types (RF, RTJ).
Bars: Diameter from 6 mm to 300 mm, custom lengths.
Sheets & Plates: Thickness from 1 mm to 100 mm, custom sizes.
Manufacturing Process: Hot rolling, cold drawing, extrusion, forging, welding (for ERW/EFW pipes/tubes), precision machining, and specialized heat treatments.
Copper Nickel Alloys C70600 & C71500: Grades, Equivalents & Properties
Copper Nickel c70600(Cu-N 90/10)-UNS C70600
Copper Nickel C70600, commonly known as Cu-Ni 90/10, contains approximately 90% copper and 10% nickel, along with small additions of iron and manganese. This composition provides excellent resistance to seawater corrosion, good formability, and reliable strength. It is widely recognized for its anti-fouling characteristics.
Chemical Composition (Typical %):
Copper (Cu): 88.0 – 91.0
Nickel (Ni): 9.0 – 11.0
Iron (Fe): 1.0 – 1.8
Manganese (Mn): 0.50 – 1.0
Zinc (Zn): 1.0 max
Mechanical Properties (Typical, Annealed):
Tensile Strength: 40-55 ksi (275-380 MPa)
Yield Strength (0.5% Ext.): 15-25 ksi (105-170 MPa)
Elongation: 35-50%
Hardness (Rockwell B): 45-75
Properties: Excellent resistance to seawater corrosion, biofouling, and stress corrosion cracking. Good thermal conductivity and strength.
International Equivalents:
EN CW352H
BS CN102
DIN 2.0882
Copper Nickel c71500 (Cu-Ni 70/30)-UNS C71500
Copper Nickel C71500, known as Cu-Ni 70/30, contains approximately 70% copper and 30% nickel, with higher iron and manganese content. This higher nickel content provides enhanced strength and superior resistance to corrosion and erosion in high-velocity and more aggressive seawater conditions, as well as improved performance at higher temperatures.
Chemical Composition (Typical %):
Copper (Cu): 68.9 – 72.0
Nickel (Ni): 29.0 – 33.0
Iron (Fe): 0.40 – 0.70
Manganese (Mn): 1.0 max
Zinc (Zn): 1.0 max
Mechanical Properties (Typical, Annealed):
Tensile Strength: 55-75 ksi (380-520 MPa)
Yield Strength (0.5% Ext.): 20-30 ksi (138-207 MPa)
Elongation: 30-45%
Hardness (Rockwell B): 60-90
Properties: Superior corrosion and erosion resistance, especially in fast-flowing and turbulent seawater. Higher strength and better resistance to stress corrosion cracking than C70600. Good for higher temperature service.
International Equivalents:
EN CW354H
BS CN107
DIN 2.0872
Copper Nickel Alloy Products: Adherence to International Specifications & Standards
Our copper-nickel alloys C70600 and C71500 are manufactured in strict accordance with the most stringent international specifications and standards. We remain committed to this commitment, ensuring superior quality, safety, and performance in critical marine, offshore, and industrial systems, serving industries such as shipbuilding, desalination, and power generation.
| Category | Applicable Standards | Description / Scope |
|---|---|---|
| Seamless Pipes/Tubes | ASTM B466 / B466M | Standard Specification for Seamless Copper-Nickel Pipe and Tube, covering dimensions and mechanical requirements. |
| Welded Pipes/Tubes | ASTM B467 / B467M | Standard Specification for Welded Copper-Nickel Pipe, covering manufacturing and testing. |
| Seamless Condenser Tubes | ASTM B111 / B111M | Standard Specification for Copper and Copper-Alloy Seamless Condenser and Heat Exchanger Tubes with Integral Fins, applicable for Cu-Ni tubes. |
| Rod, Bar, and Wire | ASTM B151 / B151M | Standard Specification for Copper-Nickel-Zinc Alloy (Nickel Silver) and Copper-Nickel Rod and Bar. |
| Plates, Sheets, Strips | ASTM B171 / B171M | Standard Specification for Copper-Alloy Plate and Sheet for Pressure Vessels, Condensers, and Heat Exchangers. |
| Pressure Piping Codes | ASME B31.1, ASME B31.3 | Power Piping (B31.1) and Process Piping (B31.3), governing the design, fabrication, installation, inspection, and testing of piping systems where Cu-Ni products are used. |
| Material Traceability | EN 10204 3.1 | Metallic Products – Types of Inspection Documents (Mandatory Mill Test Certificates for all Copper Nickel products), providing full traceability from melting to final product. |
Applications
Our copper-nickel alloys C70600 and C71500 are the preferred choice for demanding industries requiring robust, corrosion-resistant, and high-performance materials in corrosive aquatic environments.
Shipbuilding: Widely used in hull cladding, piping systems (seawater, bilge water, ballast water), heat exchangers, condensers, and other components exposed to corrosive seawater.
Offshore Oil and Gas: Due to prolonged exposure to extreme marine environments, these products are critical for piping, heat exchangers, subsea systems, and fire-fighting water systems on offshore platforms and floating production storage and offloading (FPSO) vessels.
Desalination Plants: Due to their resistance to high-temperature corrosive brine, these products are critical for piping in multi-stage flash (MSF) and multi-effect distillation (MED) evaporators, brine heaters, and heat exchangers.
Power Generation (Condenser Systems): Used in steam condensers and heat exchangers, particularly suitable for coastal power plants using seawater cooling.
Chemical and Petrochemical Industries: Suitable for applications involving mildly corrosive chemicals, especially where chloride stress corrosion cracking is a significant concern. Refrigeration and HVAC: Used in heat exchanger piping that is cooled by brackish water or seawater.
Automotive braking systems: Certain copper-nickel alloys are used in brake lines due to their excellent corrosion resistance and ductility.
Product Forms We Can Provide
| Product Category | Material Standards | Common Alloys | Key Specifications (Can be Customized) |
|---|---|---|---|
| Copper Tubes | ASTM B75, B88, B280,B111; EN 12449, 12451; DIN EN 12735; JIS H3300 | C10100 (OFE), C11000 (ETP), C12200 (DHP), C23000, C70600,C71500 | OD: 3mm - 300mm Wall Thickness: 0.5mm - 20mm Temper: Soft (O), Half-Hard (H50), Hard (H80) Form: Straight Lengths, Coils, U-Bends |
| Copper Sheets / Plates | ASTM B152, B248, B248M; EN 1652; DIN 1787; JIS H3100, H3250 | C10100 (OFE), C11000, C10200 (OF), C26000, C86200 | Thickness: 0.3mm - 100mm Width: Up to 1200mm Length: Up to 3000mm (or coils) Surface: Mill, Polished, Brushed |
| Copper Rods / Bars | ASTM B187, B301, B411; EN 12163, 12164; DIN 17672; JIS H3250 | C10100 (OFE), C11000, C14500, C36000, C63000 | Diameter/Rect. Size: 3mm - 300mm Shape: Round, Square, Hexagonal, Rectangular Condition: Drawn, Extruded, Hot Rolled |
| Copper Wires | ASTM B1, B2, B3, B258; EN 13601; IEC 60228; JIS H3100 | C10100 (OFE), C11000, C14420, C14500 | Diameter: 0.1mm - 20mm Temper: Soft, Annealed, Hard-Drawn Form: Bare, Tinned, Stranded, on Spools |
| Copper Foils / Strips | ASTM B103, B370; EN 1652; DIN 1787; JIS H3100 | C10100 (OFE), C10200, C11000, C19400, C26800 | Thickness: 0.02mm - 2.0mm Width: Up to 600mm Temper: Rolled, Annealed |
| CNC Machining Parts | As per Customer Drawing/Req. | All Common Copper Alloys (including C10100, C11000, C86200, etc.) | Process: Turning, Milling, Drilling, Tapping Tolerance: ±0.005mm - ±0.1mm Post-Processing: Deburring, Polishing, Plating |
Our factory
Our manufacturing facility operates a comprehensive and modern production line, equipped with advanced continuous casting, precision rolling, high-speed drawing, and multi-axis CNC machining centers, enabling us to process copper and copper alloys (such as C10100, C11000, C12200, C71500,C70600 etc.) into a full range of products including tubes, sheets, rods, wires, and foils. To ensure top-tier quality, we have implemented a rigorous in-process and final inspection system, utilizing state-of-the-art equipment such as spectrometers for material verification, digital tensile testers for mechanical property checks, precision dimensional gauges, and eddy current or ultrasonic testers for defect detection, guaranteeing that every product meets or exceeds international standards such as ASTM, EN, and JIS, as well as specific customer requirements.
