ASTM B111 C71500 Copper Nickel Tubes
What is the C71500 Copper?
C71500 Copper Nickel 30% Alloy offers excellent corrosion resistance, stress corrosion cracking resistance, moderately high strength and good creep resistance at elevated temperatures. C71500 contains 30% nickel and is best suited for applications in areas of high temperatures and pressures combined with high velocity and turbulence.
copper nickel 70/30 chemical composition
Copper (Cu): Approximately 65.0-71.5%
Nickel (Ni): Approximately 29.0-33.0%
Iron (Fe): Maximum 0.4%
Manganese (Mn): Maximum 1.0%
Zinc (Zn): Maximum 1.0%
Mechanical Properties:
Tensile Strength: Typically ranges from 372 MPa (54,000 psi) to 552 MPa (80,000 psi)
Yield Strength: Generally around 138-483 MPa (20,000-70,000 psi)
Elongation: Typically 30-45%
Physical Properties:
Density: Approximately 8.94 g/cm³ (0.323 lb/in³)
Melting Point: Approximately 1170-1240°C (2140-2260°F)
Applications of C71500:
C71500 Copper Nickel 30% Alloy is typically used for condensers, boiler parts, heat exchanger components, condenser components, process equipment, refrigerators, propeller sleeves, ferrules, heat exchanger tubes, evaporator tubes, distiller tubes, condenser plates, weld wire, flexible metal hose, pump impellers, welding backing rings, valve bodies, sea water service, sea water condensers, salt water pipe fittings, water boxes – salt water applications, salt water flanges, salt water piping, pump bodies and internal parts-sea water, and fittings.
FAQ
Q: Can C71500 be welded?
A: Yes, C71500 can be welded using techniques like Gas Tungsten Arc Welding (GTAW/TIG) and Gas Metal Arc Welding (GMAW/MIG), typically with matching or over-alloyed filler metals.
Q: How does C71500 resist biofouling?
A: C71500 releases copper ions at a slow, steady rate in seawater, which creates a surface that is inhospitable to marine organisms like barnacles and mussels, reducing fouling.
Q: What is the difference between C71500 and C70600?
A: The main difference is the nickel content. C71500 has ~30% Ni, offering higher strength and slightly better corrosion resistance than C70600 (90/10 CuNi with ~10% Ni), which is more ductile and economical.
Q: What is the thermal conductivity of C71500?
A: The thermal conductivity of C71500 is relatively low for a copper alloy, typically around 29 W/m·K, which is about 1/12th that of pure copper but still beneficial for heat exchanger applications.
Q: What is the typical yield strength of C71500?
A: In the annealed condition, the typical yield strength (0.2% offset) of C71500 is around 110 MPa (16 ksi). It can be significantly increased by cold working.
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.
