C68700 Copper Alloy Seamless Tube, also known as Aluminium Brass Tube, is a high-performance, non-ferrous tubing material made primarily of copper, zinc, and aluminium. It offers excellent corrosion resistance, particularly in seawater and marine environments, and is commonly used in heat exchangers, condensers, and power plant cooling systems. The seamless design ensures leak-free operation under pressure and thermal stress. Its high thermal conductivity, good mechanical strength, and resistance to biofouling make it ideal for demanding industrial and marine applications.
Key Characteristics of C68700 Aluminium Brass Seamless Tube
| Feature | Description |
|---|---|
| Type | Seamless (SMLS) copper alloy tube |
| Standard | ASME SB111 / ASTM B111 |
| Corrosion Resistance | Excellent in seawater, brackish water |
| Thermal Conductivity | ~121 W/m·K |
| Mechanical Strength | Tensile ≥ 345 MPa, Yield ≥ 125 MPa (annealed) |
| Workability | Good for expansion, bending, welding |
| Biofouling Resistance | High due to aluminium content |
Chemical Composition (UNS C68700)
Element | Percentage (%) |
|---|---|
Copper (Cu) | 76.0 – 79.0 |
Zinc (Zn) | Balance |
Aluminium (Al) | 1.8 – 2.5 |
Iron (Fe) | 0.02 – 0.06 |
Manganese (Mn) | 0.2 – 0.6 |
Arsenic (As) | Trace (for corrosion resistance) |
ASME SB111 C68700 Mechanical Properties
| Copper or Copper Alloy UNS NO. | Temper Designation | Tensile Strength | Yield Strength | Elongation in 2 in., | |
| Code | Former | min ksi(min MPa) | min ksi(min MPa) | min % | |
| C68700 | O61 | annealed | 50(345) | 18(125) | --- |
ASME SB111 C68700 Equivelant
| STANDARD | UNS | WERKSTOFF NR. |
| Aluminium Brass | C68700 | 2.0460 / 1785 |
Application of Aluminium Brass Seamless Tube
Evaporator Tubing
Heat Exchanger Tubing
Condenser Tube Plates
Distiller Tubes
Oil Well Pump Liner
Ferrules
Bourdon Tubes
Condenser Tubes
Desalination plant
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
