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Detailed size range:
Outer diameter range:
The standard outer diameter of the pipe is 0.5~360mm, of which the common supply range includes 1~200mm (straight strip or coil).
The maximum outer diameter of the Chinese standard is 30mm, the US standard can reach 105mm, and the EU standard is 64mm.
Wall thickness range:
0.1~50mm, the specific thickness is adjusted according to the outer diameter and application requirements. For example:
Thin-walled tube: 0.1~5mm (commonly used in precision medical, refrigeration and other fields);
Thick-walled tube: 5~50mm (used for heavy machinery or large-diameter pipes).
Length:
The straight strip supply length is generally 500~5000mm, and the coil supply length can reach more than 6000mm.
International standard:
ASTM standard:
ASTM B139 specifies the specifications of C54400 copper alloy bars, strips and profiles.
The material grade corresponds to CuSn4Zn4Pb4 (ASTM/CDA naming).
Other standards:
Chinese standard (GB/QB): QSn4-4-4;
Japanese standard (JIS): C5441;
EU standard (DIN/EN): CuSn4Zn4Pb4.
The main components of C54400 are copper as the base, with elements such as tin, lead, zinc and phosphorus added. The specific ranges are as follows:
Copper (Cu): balance (usually accounting for about 87%-89%).
Tin (Sn): 3.5%-4.5% (some documents extend to 3.0%-5.0%).
Lead (Pb): 3.4%-4.5% (key element, improving cutting performance).
Zinc (Zn): 1.5%-4.5% (some documents are marked as 3.0%-5.0%).
Phosphorus (P): 0.01%-0.50% (enhancing wear resistance and rigidity).
Other elements: Iron (Fe) ≤0.10%, the total of impurities such as aluminum (Al) and antimony (Sb) ≤0.2%.
Mechanical properties are significantly affected by the material state (such as annealing, cold working, heat treatment), and the main parameters are as follows:
Tensile strength
Range: 275 MPa (annealed state) to 745 MPa (spring aged state).
Typical value: 345-450 MPa for hard bars, up to 670 MPa for spring aged (H08).
Yield strength
Range: 131-434 MPa, depending on the processing state.
Elongation
Annealed state: up to 50% (some literature marked as 8%-18%).
Hard state: ≥8% (such as hard bars).
Hardness
Rockwell hardness (HRB): 7 (soft state) to 97 (superhard state).
The Rockwell B hardness of spring aged (H08) is 92.
Modulus of elasticity: 110 GPa (Young's modulus), shear modulus 40 GPa.
Other key properties
Processing performance
Cold workability: Excellent, suitable for stamping, bending and other processes, but the lead content limits deep drawing.
Hot workability: Not recommended, because lead may cause hot brittleness.
Weldability: Good soldering and brazing, but not suitable for oxyacetylene welding.
Corrosion resistance
Excellent performance in seawater, atmosphere and acid and alkali environment, suitable for marine engineering.
Application areas
Bearings, bushings, gears, valve parts, electrical connectors, etc.
Production process and product advantages of C54400 copper tube:
I. Production process
1. Raw material processing and melting
Cathode copper and phosphor copper alloy are used as raw materials, melted at a high temperature of 1200℃ through an industrial frequency furnace to form a uniform molten metal.
2. Continuous casting and cooling
The horizontal continuous casting process is used for forming, and then water-cooled to 50℃ to produce copper tube billets. The waste emulsion (S2) and copper chips (S3) generated in the process can be recycled.
Cold processing forming
Since C54400 contains lead (3.5%-4.5%), hot processing is prone to hot brittleness, so pressure processing is required in a cold state. The main processes include:
Milling: remove the surface oxide layer;
Planetary rolling: precision forming through a multi-roll mill;
Triple drawing and disc drawing: gradually drawing to the target size, and scraps (S4, S5) and waste mineral oil (S5) are generated in the process.
Annealing and finishing
Online annealing eliminates processing stress, and then surface cleaning, rewinding (defect detection) and other processes are carried out to finally obtain the finished copper tube.
2. Product advantages
Excellent corrosion resistance
Outstanding performance in seawater, atmosphere, acid and alkali environment, especially suitable for corrosive environments such as ships and marine engineering.
High strength and wear resistance
After heat treatment, the tensile strength can reach 275-745 MPa, and the hardness HRB 7-97, which is suitable for manufacturing high-load components such as bearings, bushings, gears, etc.
Excellent processing performance
Cutting performance: The lead content improves cutting efficiency, reaching 90% of free-cutting brass;
Cold processing: Supports cold rolling, cold forging and other processes, but the deformation must be controlled within 30%;
Welding performance: Can be soldered, brazed and spark welded.
Good electrical and thermal conductivity
As a copper-based alloy, it has better electrical conductivity than ordinary steel and is suitable for electrical equipment, heat exchangers and other scenarios.
Multifunctional application areas
It covers high-end fields such as aerospace (turbine blades, compressor discs), mechanical manufacturing (bearings, gears), marine engineering (propellers, pumps and valves), and electronics and electrical (precision parts).
Q1:Do you provide samples? Is it free or extra?
A1:Yes, we can provide samples free of charge and the customer will pay the freight.
Q2:What if I don't have export experience ?
A2:We have reliable forwarder agent which can ship items to you by sea/air/Express to your doorstep. Any way, we will help you choose the most suitable shipping service.
Q3:How long is your lead time?
A3:If it is in stock, it is usually 5-10 days. Or, if there is no inventory, 15 days, depending on the quantity.
Q4:What are your terms of payment?
A4:30% T/T deposit in advance, 70% T/T balance within 5 days after B/L copy, 100%.Irrevocable L/C at sight, 100% Irrevocable L/C after receive B/L 30-120 days, O/A.
Q5:How is your technical support?
A5:We provide lifetime online support through Whatsapp/ Skype/ Wechat/ Email. Any problem after delivery, we will offer you call anytime.
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