C70620,C71500 and C71640 are Copper-Nickel Alloy tube,copper nickel offers excellent corrosion resistance which widely uses for condenser and heat-exchangers, air coolers, Marine Industry and Nuclear Power etc.
C70600 (90-10 Cupronickel): The most common and economical copper-nickel alloy. It offers an excellent balance of good corrosion resistance in seawater, high thermal conductivity, and superior biofouling resistance. It is highly workable and the standard choice for general marine service.
C71500 (70-30 Cupronickel): A higher-performance alloy with significantly greater strength and superior resistance to erosion-corrosion and high-velocity seawater flow compared to C70600. It is more expensive but provides enhanced durability and longevity in demanding environments.
C71640 (66-30-2-2 Cupronickel / Alloy 722): A premium, high-strength variant of 70-30 cupronickel with additions of iron, manganese, and sometimes niobium. It achieves the highest strength and fatigue resistance among standard copper-nickels and offers the best erosion-corrosion resistance, especially in high-stress, high-flow, or sandy water conditions.
Chemical Composition
|
UNS |
Chemical Composition % |
||||||||||||
|
Cu |
Tin |
Al |
Ni |
Pb |
Fe |
Zn |
Mn |
As |
Sb |
P |
Cr |
Other Named Elements |
|
|
C70620 |
86.5min |
_ |
_ |
9.0-11.0 |
0.02 |
1.0-1.8 |
0.50max |
1.0max |
_ |
_ |
0.02max |
_ |
C.05max S.05max |
|
C71500 |
remainder |
_ |
_ |
29.0-33.0 |
0.05 |
0.40-1.0 |
1.0max |
1.0max |
_ |
_ |
_ |
_ |
_ |
|
C71640 |
remainder |
_ |
_ |
29.0-32.0 |
0.05 |
1.7-2.3 |
1.0max |
1.5-2.5 |
_ |
_ |
_ |
_ |
C.06max S.03max |
Mechanical Capacity
|
UNS |
Tensile Strength (Mpa) |
Yield Strength (Mpa) |
Elongation % |
|
C70620 |
275(annealed) 315(light-drawn) |
105(annealed) 240(light-drawn) |
_ |
|
C71500 |
360(annealed) 495(drawn and stress-relieved) |
125(annealed) 345(drawn and stress-relieved) |
12 |
|
C71640 |
435(annealed) 560(drawn and stress-relieved) |
170(annealed) 400(drawn and stress-relieved) |
_ |
Tests:
--Flattening test
--Expansion test
--Mercurous Nitrate test
--Ammonia Vapor test
--Chemical analysis
--Grain Size
--Tension testing
How to Choose
Choose C70600 (90-10) for standard, cost-sensitive applications in seawater, brackish water, or freshwater. It is ideal for condensers, heat exchanger tubes, and piping systems where general corrosion resistance, fouling resistance, and good thermal performance are the primary needs.
Choose C71500 (70-30) for more demanding, critical applications where higher corrosion resistance, especially against erosion and impingement in high-flow areas (e.g., pump impellers, tubing at inlet zones), is required. Its higher initial cost is justified for longer service life in severe conditions.
Choose C71640 (Alloy 722) for the most extreme conditions requiring maximum mechanical strength and erosion resistance. It is the top-tier choice for high-stress components like naval propeller shafts, high-pressure pump shafts, and critical seawater piping systems exposed to abrasive sand or high turbulence.
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.
