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Zhejiang Jingliang Copper-Tube Products Co., Ltd

Wholesale Naval Brass Pipe

Naval Brass Pipe

-- Steady & Reliable Manufacturer --

The Marine Standard for Seawater Resilience

Naval Brass Pipe, specifically the C46400 alloy, is a specialized copper-zinc-tin alloy engineered for one primary mission: to resist the aggressive corrosive forces of saltwater. At Zhejiang Jingliang, our Naval Brass is produced by adding roughly 1% tin to a standard brass matrix. This small addition of tin is a metallurgical masterstroke—it creates a protective barrier that significantly inhibits "dezincification," a process where zinc is leached out of the alloy in saline environments, leaving behind a weak, porous copper structure. By neutralizing this threat, Naval Brass maintains its structural integrity and high strength even when submerged in seawater or exposed to salt-heavy coastal air for decades. This makes it a superior choice over standard yellow brass for any maritime or offshore application.

Our Naval Brass pipes are manufactured through hot extrusion followed by precise cold drawing to achieve a uniform grain structure. This ensures that the pipes possess the high tensile strength required for structural marine components while maintaining enough ductility for bending and flaring. C46400 is also known for its excellent "hot formability," allowing it to be forged into complex fittings or pump components without losing its corrosion-resistant properties. At Jingliang, we take extra care in the "Annealing" stage to relieve internal stresses, ensuring that our pipes do not suffer from stress-corrosion cracking (SCC) when installed in high-vibration shipboard environments. Whether used for condenser tubes, marine hardware, or seawater piping systems, Jingliang’s Naval Brass provides the "Ocean-Proven" reliability that shipbuilders and offshore engineers demand.

Metallurgical & Mechanical Parameters

PropertyC46400 (Naval Brass) Specs
Copper Content59.0% - 62.0%
Tin Content0.50% - 1.0% (Corrosion Inhibitor)
Zinc ContentRemainder (Approx. 38%)
Tensile Strength≥ 380 MPa (Hard), ≥ 345 MPa (Soft)
Yield Strength≥ 150 MPa
Hardness (Rockwell)B55 - B80
Thermal Conductivity116 W/(m·K)
Electrical Conductivity26% IACS
Machinability Rating30% (Good for heavy parts)
StandardASTM B21 / ASTM B124 / AS 1567

Marine Hardware, Ship Piping, and Offshore Structures

Naval brass pipe is the primary material for "Marine Condenser Systems" and heat exchanger shells in naval vessels and commercial ships. It is used extensively for "Marine Hardware," including propeller shafts, decorative ship railings, and structural deck fittings that must resist salt spray. In "Offshore Oil and Gas Platforms," these pipes serve as conduits for seawater cooling and fire-suppression systems. "Coastal Power Plants" utilize naval brass for intake screens and piping because it resists "Bio-fouling" (the growth of barnacles and algae). It is also found in "Plumbing Fixtures for Coastal Homes," where standard brass would fail due to salt air. Additionally, it is used in the "Manufacturing of Precision Valves and Pumps" that handle brackish water, and for "Decorative Architectural Elements" in seaside resorts where a gold-like finish must be maintained in a corrosive atmosphere.

Dezincification Resistance and High Strength

The most critical advantage is "Enhanced Corrosion Protection" in saltwater, provided by the 1% tin content that prevents the structural weakening of the alloy. Our Naval Brass offers "High Tensile Strength," making it suitable for structural components that must endure the mechanical stresses of the open sea. The "Excellent Hot Formability" of C46400 allows for the creation of "Custom Forged Fittings" with complex geometries, reducing the number of joints in a system. It possesses "Natural Bio-fouling Resistance," which "Reduces Maintenance Costs" by preventing the buildup of marine organisms that can clog pipes and reduce heat transfer efficiency. Furthermore, the alloy’s "High Fatigue Strength" ensures it can withstand the constant vibration and pressure surges of shipboard engine rooms. Finally, the "Beautiful Golden Luster" makes it a favorite for "High-End Marine Design," providing an aesthetic that remains vibrant even in the harshest coastal environments.

Seawater-Proof Packaging and Logistics

Naval brass pipes are heavy and valuable. We package them in "Salt-Air Resistant VCI Wrapping" and secure them in "Hardwood Cases" to prevent damage during long-distance sea freight. Payment is 30% T/T and 70% L/C. We ship globally from Ningbo or Shanghai. Every shipment includes "Dezincification Resistance Test Results" and "Full Chemical Analysis" to ensure compliance with marine standards. For shipyards, we offer "Custom Cutting and Threading" services, ensuring the pipes are "Install-Ready" upon arrival at the dry dock.

  • Q: What is the difference between Naval Brass and Admiralty Brass?
  • A: Naval Brass (C46400) is a "Beta Brass" with higher strength, better for structural parts. Admiralty Brass (C44300) is an "Alpha Brass," better for heat exchanger tubes that require extreme cold-working.
  • Q: Does Naval Brass require polishing?
  • A: For decorative marine use, yes. For industrial seawater piping, a natural patina will form which actually acts as a secondary protective layer.
ABOUT US
30+YEARS OF
EXPERIENCE
About Us

A Reliable Partner of the Copper Tube Industry

Zhejiang Jingliang Copper-Tube Products Co., Ltd is China Naval Brass Pipe and Naval Brass Pipe Factory, which established in 1994, has been deeply involved in the copper tube industry for over three decades. The company primarily produce various specifications of products such as copper tubes, brass tubes, copper square tubes, fin copper tubes, copper capillary tubes, condenser copper tubes, copper evaporator tubes, and conductive rods, which are of quality and have earned the trust and acclaim of customers both domestically and internationally.

Wide Applications:

These products are widely used in various fields including air conditioning, refrigeration, heat exchange, sanitary ware, automotive, machinery, electric furnaces, and chemical industries.

Convenient Transportation:

Strategically located in Tangpu Town, renowned as the “home of copper tubes” in East China. Our company enjoys a prime location, adjacent to the Shangsan Expressway and National Highway 104, and is conveniently situated just over 70 kilometers from Hangzhou and Ningbo, ensuring easy accessibility and a business position.

Strong Financial Resources:

With its strong financial resources and advanced copper tube processing technology, our company holds an advantageous position in market share, brand value, technological content, and product quality, becoming a preferred supplier for many listed groups.

Large Scale Production:

The company occupies an area of over 20,000 square meters, with a construction area of 12,800 square meters. In 2022, our annual production exceeded 7,500 tons, with a value output of up to 450 million yuan, demonstrating our strong production capacity and market competitiveness.

Comprehensive Industry Chain:

Jingliang has now developed into a complete industrial chain integrating smelting, extrusion, drawing, precision rolling, and annealing. It has been awarded multiple honors, including "Top Ten Copper Tube Enterprises" and "Leading Taxpayer in the Copper Tube Industry".

Smart Manufacturing:

Jingliang Copper-Tube Products will better integrate the concept of factory construction into its corporate development strategy, insist on refining technology and polishing products more finely, and the future of "intelligent manufacturing".

Genuine Cooperation:

Zhejiang Jingliang Copper-Tube Products Co.,Ltd warmly welcomes friends from all walks of life to visit and offer guidance. We look forward to joining hands with you to create a brilliant future together.

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