Production process and product advantages of C26000 copper tube:

Production process

Raw material processing and smelting

Use an industrial frequency furnace to melt cathode copper and phosphor copper alloy at a high temperature of 1200℃, and form copper tube billets through a horizontal continuous casting process. Water cooling to 50℃ is used in the cooling stage to ensure material uniformity.

2. Rolling and stretching

Rolling process: Planetary rolling machine is used for long-stroke and ring hole rolling, which significantly improves dimensional accuracy and reduces copper tube eccentricity (error control within ±0.05mm).

Stretching process: Use high-speed series joint drawing machine and floating core head stretching technology to ensure the smoothness of the internal and external surfaces (Ra≤0.8μm) and support the production of long-length pipes.

Heat treatment

Matching net chain bright annealing furnace (annealing temperature 520-650℃) eliminates internal stress, makes the surface free of oxidation spots and bright and clean, and maintains stable mechanical properties of the material.

Straightening and testing

High-precision straightening machines ensure the straightness of copper tubes (≤0.3mm/m) without straightening marks.

Swiss imported direct-reading spectrometers, electronic tensile machines and other equipment accurately detect chemical composition and mechanical properties, with data error ≤0.5%.

Energy saving and environmental protection

Adopt frequency conversion power regulation technology and energy automatic metering system to reduce energy consumption; the recycling rate of waste emulsions and copper chips generated during the production process is more than 90%.

Product advantages

Excellent physical properties

High strength and plasticity: tensile strength 340-460MPa, elongation ≥25% (δ10), hardness 85-145HV, and high strength at low temperature (suitable for -40℃ environment).

Thermal conductivity/electrical conductivity: thermal conductivity 138W/(m·K), electrical conductivity 34% IACS (International Annealed Copper Standard), suitable for efficient heat transfer scenarios such as heat exchangers and radiators.

Corrosion resistance and durability

Excellent corrosion resistance in the atmosphere and fresh water, resistant to frost heave and impact, no yellow water phenomenon in long-term use, and a service life of more than 50 years.

It should be noted that corrosion cracking may occur in sulfur or ammonia environments, and carbon dioxide or nitrogen protection is required at high temperatures.

Superior processing performance

Excellent hot and cold processing performance: supports complex forming processes such as deep drawing, stamping, and forging, and the cutting efficiency is 30% of ordinary brass.

Good welding performance, can be brazed, resistance welding and other methods, the strength of the weld is ≥ 80% of the parent material.

Widely used

Construction field: water supply system, roof, decorative parts (antifreeze, maintenance-free).

Industrial field: heat exchanger, condenser, ammunition shell, instrument parts (high precision requirements).

Electronics and automobiles: radiator housing, electrical connector, cooling pipeline (electrical and thermal conductivity adaptation).

Standardization and customization

Comply with international standards such as ASTM, JIS, DIN, etc., support customized production with outer diameter of 2-910mm and wall thickness of 0.2-120mm, minimum order quantity of 300kg, and delivery cycle of about 7 days.