GNEE is a leading manufacturer and supplier of high-quality copper products. We specialize in producing durable and efficient copper products that comply with multiple global standards such as ASTM, JIS, DIN, and EN. Our C12200/TP2 copper seamless tubes are widely used in heat exchangers, condensers, and other heat transfer systems in the shipbuilding, power generation, and chemical industries.
CuZn20Al2 Features
Excellent seawater corrosion resistance: The addition of aluminum (Al) forms a dense, highly adhesive aluminum oxide (Al₂O₃) protective film on the alloy surface, which significantly improves the corrosion resistance to seawater (especially erosion corrosion and dezincification corrosion), brackish water and other chloride ion solutions. This is its core advantage for condensers and heat exchangers.
High strength: Aluminum is an effective solid solution strengthening element, which makes the strength (tensile strength, yield strength) of CuZn20Al2 much higher than ordinary brass (such as CuZn37), and even close to some low-alloy steels. This allows the tube to withstand higher pressure and mechanical loads.
Good thermal conductivity: As a copper alloy, it retains good thermal conductivity, which is essential for heat exchange applications.
Good processing performance: Although it has high strength, it still has certain formability and weldability (usually fusion welding, such as TIG welding, but it should be noted that the weldability of aluminum brass is more complicated than that of ordinary brass).
Anti-biofouling (to a certain extent): Copper ions have a certain antibacterial effect, which helps to reduce the formation of biofouling in pipes.
DIN17660 CuZn20Al2 F39 Chemical Composition
| Chemical Composition | |
| Elements | Composition, % |
| Cu, incl. Ag | 76.0-79.0 |
| Sn | - |
| Al | 1.8-2.5 |
| Ni, incl. Co | - |
| Pb | 0.07 max |
| Fe | 0.06 max |
| Zn | Balance |
| Mn | 0.02-0.06 |
Equivalent Material
| Material Designation | Corresponding Material Symbol | ||||
| GB/T8890 | ASTM B111 | BS2871 | JIS H3300 | DIN1785 | |
| Aluminums Brass | HAL77-2 | C68700 | CZ110 | C6870 | CuZn20Al2 |
Application of CuZn20Al2 Copper Alloy Tubes For Heat Exchangers
Condenser tubes: used for steam condensers in ship engines and power plants. Its excellent seawater corrosion resistance and thermal conductivity are key.
Heat exchanger tubes: widely used in heat exchangers in ships, offshore platforms, desalination plants, and chemical plants. It can withstand corrosive media such as seawater, brackish water, and certain chemical solutions.
Seawater pipeline system: high-pressure pipelines, valves, pump body connecting pipes, etc. used to transport seawater require high corrosion resistance and high strength.
Ship accessories: such as connecting pipes and accessories of seawater cooling systems.
Power station condenser tubes: the same as ship applications, it is a key material for condensers of thermal power plants and nuclear power plants using cooling towers in coastal or inland areas.
Geothermal system: heat exchanger tubes used in geothermal energy utilization systems, resistant to corrosion from geothermal fluids.
Chemical heat exchanger tubes: heat exchange equipment used to handle corrosive chemical media (such as certain acids, alkalis, and salt solutions), requiring materials to have both corrosion resistance and a certain strength.
Hydraulic lines: Used as pipes in high-pressure hydraulic systems that require extremely high strength, good toughness and some corrosion resistance
Copper products that GNEE can provide
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High quality 99.9% pure copper pipe / straight copper tube / copper alloy pipe |
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Standard |
ASTM,DIN,BS,CDA,JIS,GB |
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Material |
T1,T2,C10100,C10200,C10300,C10400,C10500,C10700,C10800, |
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Shape |
Round,Square,Rectangular,etc. |
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Specifications |
Round:wall thickness:0.2mm~120mm,outside diameter:2mm~910mm
Square:wall thickness:0.2mm~120mm,size:2mm*2mm~1016mm*1016mm Rectangularwall thickness:0.2mm~120mm,size:2mm*4mm~1016mm*1219mm |
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Length |
3m,5.8m, 6m, 11.8m, 12m, or as required. |
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Hardness |
1/16 hard,1/8 hard,3/8 hard,1/4 hard,1/2hard,full hard,soft,etc |
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Surface |
mill,polished,bright,oiled,hair line,brush,mirror,sand blast,or as required. |
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Price term |
EXW, FOB, CFR, CIF, etc. |
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Payment term |
T/T |
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Package |
Export standard package: bundled wooden box, suit for all kinds of transport, |
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Delivery time |
According to order quantity |
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Export to |
Singapore,Indonesia,Ukraine,Korea,Thailand, Vietnam, Saudi Arabia, Brazil, Spain, |
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Application |
Copper pipe is the first choice of residential housing water pipes, heating, cooling pipes |
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Straight copper rod/copper round bar |
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Standard |
ASTM,DIN,BS,CDA,JIS,GB |
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Material |
T1,T2,C10100,C10200,C10300,C10400,C10500,C10700,C10800, |
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Shape |
Round,Square,Rectangular,etc. |
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Specifications |
Diameter:3~200mm |
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Length |
3m,5.8m, 6m, 11.8m, 12m, or as required. |
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Hardness |
1/16 hard,1/8 hard,3/8 hard,1/4 hard,1/2hard,full hard,soft,etc |
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Surface |
mill,polished,bright,oiled,hair line,brush,mirror,sand blast,or as required. |
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Price term |
EXW, FOB, CFR, CIF, etc. |
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Payment term |
T/T |
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Package |
Export standard package: bundled wooden box, suit for all kinds of transport, |
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Delivery time |
According to order quantity |
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Export to |
Singapore,Indonesia,Ukraine,Korea,Thailand, Vietnam, Saudi Arabia, Brazil, Spain, |
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Application |
A copper rod is a type of colored metal processing bar stock with high electrical conductivity. It is mainly divided into brass |
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Size |
Width: 10mm to 2000mm, |
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Hardness |
1/16 hard,1/8 hard,3/8 hard,1/4 hard,1/2hard,full hard. |
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Surface |
Polished,bright,oiled,hair line,brush,mirror,or as required |
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Package |
Plastic film with Wooden case or wooden pallet |
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Delivery time |
Prompt delivery or upon your order quantity. |
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Quality Control |
Mill Test Certification is supplied with shipment,Third Part Inspection is acceptable. |
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Application |
widely used inair conditioners,refrigerators,electric,solar water heater, polished pipe an be used in decorative,such as stair |
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Shape |
Round, Square, Oval, can be customized |
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Item |
Copper Wire |
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Standard |
ASTM,DIN,BS,CDA,JIS,GB |
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Material |
T1,T2,C10100,C10200,C10300,C10400,C10500,C10700,C10800, |
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Shape |
Round |
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Specifications |
As required. |
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Length |
As required. |
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Hardness |
1/16 hard,1/8 hard,3/8 hard,1/4 hard,1/2hard,full hard,soft,etc |
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Surface |
mill,polished,bright,oiled,hair line,brush,mirror,sand blast,or as required. |
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Price term |
EXW, FOB, CFR, CIF, etc. |
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Payment term |
T/T |
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Package |
Export standard package: bundled wooden box, suit for all kinds of transport, |
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Delivery time |
According to order quantity |
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Application |
Copper wire, as a conductive material, is widely used in power transmission and electronic devices. Transformers, inductors, |
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Copper CNC machined parts
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Custom CNC Machining Parts of Most Materials
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Quotation
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According to your drawing(size, material, thickness, processing content, and required technology, etc)
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Materials Avaiable
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Brass,Stainless Steel,Q235&Q345 steel, Zinc-plate Sheet,Stainless Steel, Aluminum,Copper, etc.
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Surface Treatment
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Zinc Plating, chrome plate, powder coating, anodizing, wire drawing, silk-screen printing, etc
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Processing
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Laser Cutting, Precision Stamping, CNC Bending, CNC Milling, CNC Turning, Threading, Riveting, Drilling, CNC Punching,Die Casting, Laser Welding, etc.
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Testing Equipment
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CMM/Tool microscope/multi-joint arm/Automatic height gauge/Manual height gauge/Dial gauge/Roughness measurement
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Drawing Formats
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PRO/E, Auto CAD, Solid Works , UG, CAD / CAM / CAE, PDF
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Our Advantages
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1.) 24 hours online service & Quickly Quote/Delivery.
2.) 100% QC quality inspection before delivery, and can provide quality inspection form.
3.) 18+ years of experience in the CNC machining area and have a senior design team to offer perfect modification suggestions. |
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Tolerance丨Surface Roughness
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Generally +/-0.1-0.2mm
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Sample service
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Avaliable before bulk order. Samples charge according your design, The sample fee can be used as the payment for mass goods.
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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
