UNS C44300 Admiralty Brass Tube PDF
What is ASTM B111 C44300 copper tubing?
ASTM B111 C44300 Admiralty brass is composed of zinc, copper and tin. Copper provides the increased heat transfer which zinc provides the corrosion resistance. In applications such as condensers and heat exchangers cooled with fresh, salt, or brackish water, these tubes are very useful. You will find them in oil refineries, power plants, and other industrial applications.
Pump Barrels or Sucker Rod Pumps, used in oil drilling also use admiralty brass due to its corrosion resistance. Even though the pumps typically last between 6 months and 1 year, admiralty brass is a preferred material for improved longevity over carbon steel and below the price of materials such as monel 400.
One of the most commonly used heat exchange alloys, its usage goes back for over 70 years. Successfully built and maintained C44300 admiralty brass heat exchangers and power plant condensers have been in service for over fifty years.
Key Properties of Admiralty Brass Tubes
Superior Corrosion Resistance: Delivers excellent defense against corrosion in fresh and saltwater. The tin content effectively stops dezincification while the copper base resists biofouling from marine organisms.
Excellent Thermal Conductivity: High thermal conductivity around 110 W/m·K ensures efficient heat transfer far superior to stainless steel or titanium for more compact and energy-efficient designs.
Robust Mechanical Strength: Provides the mechanical integrity for industrial service. A typical tensile strength of 310 MPa (45,000 psi) handles operational pressures vibrations and thermal cycling.
High Fabricability: The alloy's ductility allows easy bending flaring and forming into complex shapes like U-bends for shell-and-tube heat exchangers.
Proven Weldability: Compatible with standard soldering and brazing to create strong leak-proof connections essential for fluid handling systems.
Chemical Composition
| Designation | Chemical Composition % | ||||||||
| Cu | Sn | Al | As | Ni | Fe | Mn | Pb max. | Zn | |
| C44300
C4430 CZ111 CuZn28Sn1 |
70.0-73.0 | 0.9-1.2 | – | 0.02-0.06 | – | 0.06max | – | 0.07 | Rem |










Tensile Requirements
| Copper or Copper Alloy UNS NO. | Temper Designation | Tensile Strength, | Yield Strength, | |
| Standard | Former | min ksi | min ksi | |
| C44300 | O61 | annealed | 45 | 15 |
Marine and Naval Applications
Main and auxiliary steam condensers – Excellent thermal conductivity and corrosion resistance of Admiralty Brass make it extensively utilized in main and auxiliary steam condensers. Under high-moisture, high-temperature conditions where steam is condensed back to water, it runs consistently. Its robustness prolongs the lifetime of condenser units in marine and power environments and helps to preserve system efficiency.
Lube oil coolers and marine heat exchangers – Admiralty Brass resists saltwater corrosion hence it is utilized in lubricating oil coolers and heat exchangers in marine systems. Its better heat transfer properties guarantee effective cooling of equipment fluid and lubricants. On ships and offshore platforms, this increases general system performance and lowers equipment wear.
Evaporator tubing in desalination plants – Desalination plants use Admiralty Brass's evaporator tubing to handle brine and seawater without scaling or fouling. Its anti-corrosion and biofouling guarantees continuous heat exchange in demanding salinity. Long lifetime of the alloy improves plant dependability and lowers maintenance expenses.
Hydraulic and fluid handling pipelines – Because of its workability, strength, and corrosion resistance, Admiralty Brass is chosen in hydraulic and fluid systems. It reacts with industrial or marine fluids but effectively moves fluids under pressure. For industrial machines and onboard systems alike, this makes it perfect.
Test Report
1.Online Eddy-Current Test
2.Spectrum Test
3.Hardness Test
4.Tensile Strength Test
5.Elongation Test
6.Automatic Hydrostatic Pressure Test
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Founded in 2008, we are a leading professional exporter specializing in a comprehensive range of high-quality copper products for global markets. Our core product portfolio encompasses various forms and specifications to meet diverse industrial needs.
Copper Tubes & Pipes:
We supply both Copper Seamless Tubes (ASTM B68, B75) and Copper Welded Tubes, including Pure Copper Tubes (C11000, C12200), Brass Tubes (C23000, C26000, C28000), and specialized Admiralty Brass Tubes (C44300) for superior corrosion resistance in heat exchanger applications. Our offerings comply with key ASTM standards such as ASTM B88 for seamless water tube and ASTM B111 for condenser tubes.
Copper Sheets & Plates:
Our range covers from thin-gauge Thin Copper Sheet (ASTM B152) to heavy-duty Thick Copper Plate, available in alloys like Pure Copper (C11000), Brass Sheet (C26000), Phosphor Bronze Sheet (C51000, C52100), and corrosion-resistant Admiralty Brass Sheet/Plate (C44300).
Copper Rods & Bars:
We provide Copper Round Rod, Copper Square Bar, Copper Hexagon Bar, and Copper Flat Bar in various tempers. Products include Free-Cutting Brass Rod (C36000 per ASTM B16), Oxygen-Free Copper Rod (C10100/C10200, ASTM B187), Beryllium Copper Bar (C17200, ASTM B196), and Admiralty Brass Rod (C44300).
Copper Wires & Strips:
Our Copper Wire products include Bare Copper Wire (ASTM B1/B2/B3), Enamelled Copper Wire, and Brass Wire. We also supply precision Copper Strip (C11000, C26800), Brass Strip, and Admiralty Brass Strip (C44300) for electrical, marine, and fabrication applications.





