Cu-Ni (C71640, CW353H) Tube is a modified version of 70-30 alloy tube and contains 2% iron and 2% Mn and can withstand higher flow rates than 90-10 and 70-30. The other important note is that it has slightly less resistance to localized corrosion. These C71640 products are mainly used as condenser tubing. Commercially, UNS C71640 condenser tubes are mainly in demand by Industrial Plants. It was originally developed for higher resistance to erosion corrosion in the presence of suspended solids and has been extremely successful in multi-stage flash desalination plants, particularly in the heat rejection and brine heater sections.
Advantage of CuNi Tubes:
Simple alloying system with good weldability
Excellent ductility and toughness
Outstanding erosion corrosion performance
Resistant to uniform and localised corrosion
No effect of ambient seawater temperatures
No effect of seawater chlorination
Resistant to biofouling
Resistant to stress-corrosion cracking
Low maintenance costs
A lot of design experience
Material Grades
| Material Designation | Corresponding Material Symbol | ||||
| ASTM B111 | BS2871 | JIS H3300 | DIN1785 | GB/T 8890 | |
| Copper Nickel | C70600 | CN102 | C7060 | CuNi10Fe1Mn | BFe10-1-1 |
| C71500 | CN107 | C7150 | CuNi30Mn1Fe | BFe30-1-1 | |
| C71640 | CN108 | C7164 | CuNi30Fe2Mn2 | BFe30-2-2 | |
| C70400 | - | - | - | BFe5-1.5-0.5 | |
| - | - | - | - | B7 | |
| Aluminium Brass | C68700 | CZ110 | C6870 | CuZn20AL2 | HAL77-2 |
| Admiralty Brass | C44300 | CZ111 | C4430 | CuZn28Sn1 | HSn70-1 |
| Boric Brass | - | - | - | - | Hsn70-1B |
| - | - | - | - | Hsn70-1 AB | |
| Arsenical Brass | - | CZ126 | - | - | H68A |
| Brass Tube | C28000/C27200 | CZ108 | C2800/C2700 | CuZn36/CuZn37 | H65/H63 |
Chemical Composition & Mechanical Properties
| Steel Grade | Cu | Sn | Al | As | Ni | Fe | Mn | Pb | Zn |
| C70400 | Remain | - | - | - | 4.8-6.2 | 1.3-1.7 | 0.3-0.8 | 0.05 max | 1.0 max |
| C70600 | Remain | - | - | - | 9.0-11.0 | 1.0-1.8 | 1.0 max | 0.05 max | 1.0 max |
| C71500 | Remain | - | - | - | 29.0-33.0 | 0.4-1.0 | 1.0 max | 0.05 max | 1.0 max |
| C71640 | Remain | - | - | - | 29.0-32.0 | 1.7-2.3 | 1.5-2.5 | 0.05 max | 1.0 max |
Applications
Hydraulic lines
Fish cages for aquaculture
Heat exchangers and condensers
Desalination units
Sea water pipework
Tubes for power plants and ships
Offshore fire water systems
Pumps, valves, sheathing and fittings for ship hulls
Desalination units
Hydraulic lines
Fish cages for aquaculture
Heat exchangers and condensers
Sea water pipework
Offshore fire water systems
Tubes for power plants and ships
Pumps, valves, sheathing and fittings for ship hulls
Copper products that GNEE can provide
| Product Name | Copper Pipe |
| Standard | ASTM,JIS,DIN,GB,AISI,DIN,EN |
| Material | T1, T2, T3, C21000, C22000, C22600, C23000, C24000, C26000, C26130, C26800, C27000, C27200, C46500, C51000, C52100, C53400, C61300, C61400, C63000, C63800, C65100, C65500, H63, H65, H68, H70, H80, H85, H90, H96. |
| Purity | 99.9% |
| Technique | Cold drawn, hot rolled, cold rolled and others. |
| Side shape | Round, Square, Rectangular, ect |
| Outer Diameter | 6.35-406mm or Customizable |
| Thickness | 0.5-80mm or Customizable |
| Length | 1-12m or Customizable |
| Surface Treatment | Coating, Oxidation, Coating, Polishing, etc. |
| Type | Seamless, Welded |
| Origin | China |
| Delivery Time | 7-15 days, depending on the situation and quantity |
| Price Terms | EXW, FOB, CIF, CRF, CNF or others |
| Loading Port | Any port in China |
| Payment Term | TT, LC,Cash, Paypal, DP, DA,Western Union or Others. |
| Application | 1. Construction industry2. Mechanical production, energy extraction3. Home appliance industry, refrigeration industry, transportation industry, home decoration and bathroom4. Communication technology, infrastructure, municipal pipeline network, etc. |
| Packaging | Bundle, PVC Bag, Nylon Belt, Cable Tie, Standard export seaworthy package or as Reque |
| Processing Servic | Bending, Welding, Decoiling, Punching, Cutting and Others |
| Tolerance | ±1% |
|
Standard |
ASTMB152,B187,B133,B301,B196,B441,B465,JISH3250-2006, |
|
Material |
C10100,C10200,C10300,C10400,C10500,C10700,C10800,C10910,C10920, |
|
Diameter |
3mm~800mm |
|
Length |
1.0m 5.8m,6m,or as required |
|
Export to |
Singapore,India,Poland,Indonesia,Ukraine,Spain,Korea,Thailand,Canada,USA, |
|
Container Size |
20ft GP:5898mm(Length)x2352mm(Width)x2393mm(High) |
|
Price Term |
Ex-work, FOB, CFR, CIF, etc. |
|
Application |
Copper bar is widely used in boat building,War industry, Car industry and communication |
|
Package |
Standard export seaworthy package,suit for all kinds of transport,or as required. |
|
Contact |
If you have any question,please feel free to contact me. |
|
Product name |
Copper Strip / Copper tape / Copper sheets coil |
|
Shape |
strip,tape,band,coil,roll |
|
Standard |
ASTM, ISO, JIS, DIN, GB, EN |
|
Grade |
ASTM:C10100,C10200,C10300,C10400,C10500,C10700,C10800,C10910,C10920, |
|
MOQ |
300KG |
|
Temper |
1/4 hard,1/2hard,full hard,soft,etc |
|
Surface |
Mill finish, polished, anodizing, brushing, sand blasting, powder coating,etc |
|
Payment terms |
T/T,L/C,western union, Paypal |
|
Price terms |
CIF,CFR,FOB,CIF,EXW,CNF |
|
Width |
0.1-1500mm or customized |
|
Thickness |
0.1-50mm or customized |
|
Package |
Standard export seaworthy package or as required. |
|
Delivery time |
About 7~10 working days after deposit received |
|
Application |
1)Further making utensil. |
|
Product Name |
Copper Wire |
|
Type |
Insulated |
|
Payment term |
TT/Trade Insurance/Credit card |
|
Delivery time |
7-30days( Depend on the quantity) |
|
Shipping terms |
FOB CIF DDP EXW |
|
Thermal Class |
130/155/180/200/220 C |
|
Diameter |
0.04mm-6.0mm |
|
Enameled Type |
Polyester/Polyurethane/Polyesterimide/Polyamide-imide |
|
Application |
Motor Transformer Fan Speaker |
|
Conductor content |
99% |
Copper CNC machined parts
|
Product Name |
Copper Wire |
|
Type |
Insulated |
|
Payment term |
TT/Trade Insurance/Credit card |
|
Delivery time |
7-30days( Depend on the quantity) |
|
Shipping terms |
FOB CIF DDP EXW |
|
Thermal Class |
130/155/180/200/220 C |
|
Diameter |
0.04mm-6.0mm |
|
Enameled Type |
Polyester/Polyurethane/Polyesterimide/Polyamide-imide |
|
Application |
Motor Transformer Fan Speaker |
|
Conductor content |
99% |
About Us
Founded in 2008, we specialize in exporting premium copper products. Our manufacturing leverages continuous casting lines and precision drawing machines. Rigorous quality control, including eddy current testing and spectrometer analysis, guarantees the superior performance of our copper tubes and coils for global applications.
If you need any help, please contact us immediately!
Email address：sales@gneemetal.com
Square Meters Built
Enterprise Employees
Cooperating Partner
Years Experience
