ASTM B111 C44300 (UNS C44300) is a lead-free aluminum brass alloy specifically engineered for marine and industrial applications requiring exceptional resistance to dezincification, erosion, and biofouling. These seamless tubes are ideal for condensers, heat exchangers, and desalination systems operating in seawater or brackish environments.
Characteristics of C44300 Copper Alloy Tubes For Heat Exchangers
Material Type: CuZn21Al1As (Aluminum Brass with Arsenic addition)
Standards: ASTM B111, ASME SB111, EN 12451
Temperature Range: -40°C to 150°C (-40°F to 302°F)
Certifications: NACE MR0175, ISO 9001:2015
C44300 Chemical Composition (ASTM B111)
| Element | Min (%) | Max (%) | Role in Alloy |
|---|---|---|---|
| Copper (Cu) | 70.0 | 73.0 | Base metal for corrosion resistance |
| Zinc (Zn) | 26.7 | 29.3 | Enhances strength and workability |
| Arsenic (As) | 0.02 | 0.10 | Prevents dezincification in seawater |
| Aluminum (Al) | - | 0.02 | Improves oxide layer adhesion |
| Iron (Fe) | - | 0.06 | Controlled impurity |
| Lead (Pb) | - | 0.07 | Maintains machinability |
Equivalent Grades & International Standards
| Standard | Grade | Region/Application |
|---|---|---|
| UNS | C44300 | Global marine systems |
| EN | CW702R | European heat exchangers |
| DIN | 2.0460 | German shipbuilding |
| JIS | C6870 | Japanese condensers |
| GB | HAl77-2 | Chinese industrial standards |
Mechanical Properties of C44300 Naval Brass for Heat Exchanger
| Property | Annealed Condition | Hard Temper | Test Method |
|---|---|---|---|
| Tensile Strength (MPa) | 340 - 410 | 440 - 520 | ASTM E8/E8M |
| Yield Strength (MPa) | ≥125 | ≥275 | ASTM E8/E8M |
| Elongation (%) | ≥45 | ≥15 | ASTM E8/E8M |
| Hardness (Rockwell B) | 65 - 75 | 80 - 90 | ASTM E18 |
| Thermal Conductivity (W/m·K) | 116 | 105 | ASTM E1225 |
Industrial Applications of C44300 Copper Extruded Heat Exchanger Tube
| Industry | Typical Uses | Performance Advantage |
|---|---|---|
| Marine Engineering | Shipboard condensers, desalination plant heat exchangers | Resists biofouling and saltwater pitting (0.05 mm/year corrosion rate) |
| Power Generation | Steam turbine cooling systems, nuclear plant tubing | Withstands high-velocity seawater (up to 3 m/s) |
| Oil & Gas | Offshore platform cooling loops, LNG heat exchangers | Compatible with chlorinated fluids (up to 5 ppm Cl⁻) |
| Chemical Processing | Acidic fluid transfer systems, evaporators | Stable in pH 6-8.5 environments |
Why Choose ASTM B111 C44300 radiator copper pipe?
Superior Lifespan: 20-30 years in seawater applications (vs. 10-15 years for Admiralty Brass).
Cost-Efficiency: 15-20% lower lifecycle cost compared to titanium alternatives.
Manufacturing Flexibility: Available as seamless/ERW tubes, U-bends, or custom lengths (1-12 meters).
Testing Guarantee: 100% eddy current tested (ASTM E309), hydrostatic pressure tested (ASTM B88).
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
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Enterprise Employees
Cooperating Partner
Years Experience
