UNS C44300 Admiralty Brass Tube PDF
What is C44300 copper tubing?
Admiralty Brass is a high-performance brass alloy alloyed with tin (0.9–1.2%) and trace elements such as arsenic and iron. Its precise chemistry prevents zinc leaching in seawater and harsh chemicals, making it ideal for tubes, fittings, and components in heat exchangers, condensers, pumps, and valves. Engineers appreciate its balance of strength, conductivity, and machine-ability, while buyers value its proven lifecycle savings over competing alloys.
Admiralty Brass (C44300) has set the benchmark for copper-zinc alloys in demanding marine, industrial, and process applications.
Developed in the 19th century to meet the Royal Navy's need for a dezincification-resistant alloy, it now serves as the material of choice for engineers and procurement specialists who require reliable, long-lasting components. These marine-grade, dezincification-resistant brass tubes ensure reliability in even the harshest saltwater conditions.
Admiralty brass composition breakdown
| Element | Typical Range | Purpose |
|---|---|---|
| Copper | 70.0–73.0 % | Base metal: ductility, conductivity, & thermal transfer |
| Zinc | Balance | Strength & hardness control |
| Tin | 0.9–1.2 % | Core dezincification resistance |
| Lead | ≤ 0.07 % | Enhances machinability for tight-tolerance parts |
| Iron | ≤ 0.06 % | Grain refinement and mechanical stability |
| Arsenic | 0.02–0.06 % | Boosts corrosion resistance in chloride environments |
Key properties of admiralty brass composition
Corrosion Resistance: As a dezincification-resistant brass alloy, engineered against dezincification, achieving over 25 years of service in seawater condensers. Engineered against dezincification, achieving over 25 years of service in seawater condensers.
Thermal Conductivity: Approximately 110 W/m·K, enabling efficient heat exchanger tubing performance in high-capacity systems.
Mechanical Strength: Tensile strengths of 310–380 MPa and yield strengths of 180–220 MPa, supporting pressures up to 25 bar.
Workability: Lead-assisted chip breaking and fine-grained structure facilitate CNC machining, bending, and forming without micro-cracking.
Applications and product range
Marine brass tubes and offshore applications
Tube Stock & U-Bends: Custom lengths, OD 12–50 mm, WT 1–4 mm
Pump Components: Impellers, housings, and valve bodies
Heat exchanger tubing for HVAC and district cooling
Condenser & Evaporator Tubes: Compatible with standard tube bundles
Finstock & Coil Assemblies: Pre-formed coils with brazing-ready surfaces
Chemical processing: dezincification-resistant brass components
Fittings & Flanges: ASME B16.22 certified
Heat Exchanger Plates: Plate-and-frame assemblies per customer drawings
Sanitary and plumbing brass tubes
Precision Fittings: Compression fittings and sanitary tri-clamp ferrules
Instrumentation Tubes: OD as small as 6 mm for control systems
Advantages over competing alloys
| Alloy | Corrosion | Strength | Machinability | Total Cost of Ownership |
|---|---|---|---|---|
| Admiralty Brass | Superior | 310–380 MPa | High | Lowest in harsh environments |
| Muntz Metal | Moderate | 280–330 MPa | Medium | Higher maintenance costs |
| Naval Brass | Good | 250–300 MPa | Medium | Limited lifecycle gains |
Technical specifications and support
Standards: ASTM B111 / ASME SB-111, BS 2871 CZ-111, EN ISO 1652
Inspection: 100% eddy-current testing on tubes; ultrasonic thickness gauging
Documentation: Mill Test Reports (MTR), Certificates of Origin, and 3.1/3.2 certification
Custom Services: CNC machining, bending, brazing, and final assembly support
Example applications
Example 1: container vessel condenser tubes
A 12,000 TEU vessel experienced condenser tube failures within five years. Tube bundles per ASTM B111 were installed. After installation, no tube leaks occurred over eight years, reducing dry‑dock costs by $300,000 annually.
Example 2: Middle East district cooling plant
An 80 MW plant faced tube fouling and shutdowns after three years. Admiralty Brass plate‑and‑frame exchanger plates were retrofitted, delivering a 12 % efficiency boost and cutting unplanned shutdowns from six to one per year, projecting a 30 % reduction in total cost of ownership over 15 years.
Our spot inventory
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ASTM B111 C44300 tube |
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C44300 condenser tube |
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C44300 copper pipe |
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.
