C44300 copper tube (naval brass) is a copper-zinc alloy tube widely used in marine engineering, heat exchangers and petrochemical fields. Its production process and product advantages are as follows:

1. Production process

Smelting and continuous casting

The raw materials (cathode copper, phosphor copper alloy, etc.) are melted at 1200℃ in an industrial frequency furnace and formed into copper tube blanks through a horizontal continuous casting process. Waste emulsion and copper scraps are generated in this stage and need to be recycled.

Rolling and stretching

Planetary rolling: Long-stroke tube rolling mill is used to improve dimensional accuracy and reduce eccentricity.

Stretching process: Patented technologies such as "floating extrusion die" and "universal stretching die" are applied, combined with floating core head stretching technology to ensure smooth inner and outer surfaces of the tube and precise dimensions. High-speed tandem drawing machine can improve efficiency.

Annealing and forming

The mesh chain bright annealing technology is used to eliminate processing stress and keep the surface free of oxidation spots. It is subsequently formed through bending, welding and other processes, and the welding needs to control smoke pollution.

Surface treatment and testing

Cleaning: Use a grinding disc, sandpaper or sandblasting to clean the surface.

Testing: Including eddy current test, intergranular corrosion test and spectral analysis, etc., to ensure compliance with ASTM B111 and other standards.

2. Product advantages

Excellent corrosion resistance

Adding arsenic (0.4%) inhibits dezincification corrosion, suitable for seawater, fresh water and sulfide-containing environments.

It performs well in marine cooling systems and desalination equipment, with a service life of more than 10 years.

High thermal conductivity and mechanical properties

Thermal conductivity is 109 W/(m·K), suitable for efficient heat transfer scenarios such as heat exchangers and condensers.

Tensile strength ≥330 MPa, elongation ≥40%, with both high strength and processing plasticity.

Processing convenience

It can be formed by rolling, stamping and bending, and supports threaded connection and welding.

Excellent cold processing performance, suitable for complex structure manufacturing.

Standardization and environmental protection

Complies with international standards such as ASTM B111, ASME SB466, and adapts to global industrial needs.

Recycling of waste materials (copper chips, emulsion) in the production process reduces environmental impact.

Wide application

Applicable to ship heat exchangers, oil pump pipes, chemical equipment and building HVAC systems, with both pressure resistance and wear resistance.