ASTM B111 C71500 Copper Nickel Tubes
What is the C71500 Copper?
Cupronickel or copper-nickel is an alloy of copper that contains nickel and strengthening elements, such as iron and manganese. cupronickel is highly resistant to corrosion in seawater because its electrode potential is adjusted to be neutral with regard to seawater. Because of this, it is used for piping, heat exchangers, and condensers in seawater systems, as well as marine hardware, and sometimes for the propellers, crankshafts, and hulls of premium tugboats, fishing boats, and other working boats.
Copper nickel 70-30% 715 is one of the most corrosion-resistant and durable copper-base alloys for condenser and heat exchanger tubes in seawater. In high-pressure, high-temperature steam stations, copper-nickel 70-30% tubes are used in feedwater heaters regardless of the type of tube used in the main condensers.
c71500 mechanical properties
| Properties | Metric | Imperial |
| Tensile strength, ultimate | 303-414 MPa | 43900-60000 psi |
| Tensile strength, yield (depending on temper) | 110-393 MPa | 16000-57000 psi |
| Elongation at break (in 254 mm) | 42.00% | 42.00% |
| Machinability (UNS C36000 (free-cutting brass) = 100%) | 20% | 20% |
| Shear modulus | 52.0 GPa | 7540 ksi |
| Poisson's ratio | 0.34 | 0.34 |
| Elastic modulus | 140 GPa | 20300 ksi |
Fabrication
| JOINING TECHNIQUE | SUITABILITY |
| Brazing | Excellent |
| Butt Weld | Excellent |
| Capacity for Being Cold Worked | Good |
| Capacity for Being Hot Formed | Good |
| Coated Metal Arc Welding | Good |
| Gas Shielded Arc Welding | Excellent |
| Machinability Rating | 20 |
| Oxyacetylene Welding | Fair |
| Seam Weld | Good |
| Soldering | Excellent |
| Spot Weld | Good |
Specification
|
Forms |
ASTM & ASME & SAE |
|
Bar |
ASTM B122, ASTM B151, ASME SB-122, ASME SB-151, SAE J461, SAE J463 |
|
Rod |
ASTM B122, ASTM B151, ASME SB-122, ASME SB-151, SAE J461, SAE J463 |
|
Tube |
ASTM B111, ASTM B359, ASTM B395, ASTM B466, ASTM B543, ASTM B552, ASTM B956, ASTM B1014, ASME SB-111, ASME SB-359, ASME SB-395, ASME SB-466, ASME SB-543, ASME SB-552, ASME SB-956, ASME SB-1014, SAE J461, SAE J463 |
|
Pipe |
ASTM B466, ASTM B467, ASTM B608, ASME SB-466, ASME SB-467, ASME SB-608, |
|
Plate |
ASTM B171, ASME SB-171, SAE J461, SAE J463 |
|
Sheet |
ASTM B171, ASME SB-171, SAE J461, SAE J463 |
|
Forging |
SAE J461, SAE J463 |
Application
Used for Boiler, Heat Exchanger, Marine, Welding industry, White Goods - Electronics, etc.
Examples:
Backing Rings, Condenser Plates, Evaporator Tubes, Flexible Metal Hose, Propeller Sleeves, Pump Impellers, Refrigerators, Salt Water Piping, Valve Bodies, etc.
FAQ
Q: What are the key properties of C71500?
A: C71500 is renowned for its excellent corrosion resistance in seawater and marine atmospheres, good biofouling resistance, high strength, good ductility, and thermal conductivity.
Q: How does C71500's corrosion resistance compare to stainless steel?
A: In stagnant or slow-moving seawater, C71500 generally exhibits superior resistance to localized corrosion (like pitting and crevice corrosion) compared to many standard stainless steels.
Q: What is the maximum service temperature for C71500?
A: C71500 can be used in continuous service at temperatures up to approximately 400°C (750°F), though mechanical properties will decrease at elevated temperatures.
Q: Is C71500 magnetic?
A: No, C71500 is essentially non-magnetic due to its high nickel content and austenitic structure, similar to many stainless steels.
Q: What are the most common applications for C71500?
A: Common applications for C71500 include seawater cooling pipes and heat exchanger tubes for ships, offshore platforms, desalination plants, and coastal power stations.
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.
Pre-shipment inspection
We provide engineering-grade protective packaging for each and every product. Whether it's heavy copper tubes and plates, or precision rods, wires, and ultra-thin foils, we employ multi-layer composite protection: the inner layer uses scratch-resistant PE film and custom padding for physical isolation and cushioning; the middle layer is treated with moisture-proof sealing and includes desiccants; the outer layer utilizes reinforced wooden crates or high-strength waterproof wrapping film, depending on the shape and weight, for stabilization and protection. This ensures that the products withstand moisture, oxidation, and impact during long-distance sea or land transportation, arriving in perfect condition at your site. In terms of delivery, we commit to efficiency and reliability: standard specification products can be prepared and shipped within 7-15 working days, while customized products will also enter production scheduling promptly. We maintain full transparency throughout the process, allowing you to precisely control timelines and ensure your project proceeds as planned.
