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The core size parameters of C54400 copper bushing are customized according to the application scenario, mainly including:
Inner diameter (ID): Common range is from a few millimeters to hundreds of millimeters, such as the standard diameter covers 10~315mm, and the specific application can be customized to 0.5~360mm (such as pipe or bar processing).
Outer diameter (OD): Usually several millimeters to tens of millimeters larger than the inner diameter, for example, when the inner diameter is 5mm, the outer diameter is 7mm (wall thickness 1.0mm), and the outer diameter of large-size bushings can reach more than 300mm.
Length (L): Determined according to the load-bearing requirements or installation space, the recommended aspect ratio is ≤2.5. The common length tolerance is ±0.1~±0.5mm.
Wall thickness (T): Taking into account both strength and wear resistance, the typical wall thickness is 1.0~50mm, such as the bar diameter 3~120mm.
C54400 copper bushing complies with the following international standards:
Material standard:
ASTM/CDA: CuSn4Zn4Pb4, corresponding to ASTM B139 specification (applicable to bars, strips, etc.).
DIN/EN: CuSn4Zn4Pb4.
JIS: C5441, China National Standard (GB/QB): QSn4-4-4.
Tolerance standard:
High-precision application: ISO H7/H8 tolerance (inner diameter/outer diameter).
General industrial application: ISO H9/H10 tolerance, geometric tolerance must meet the requirements of roundness, coaxiality, etc.
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 bushing:
1. Production process
Molding process
C54400 copper alloy is mainly cold-processed, and the degree of deformation usually does not exceed 30%, and it is not suitable for hot processing. The specific process includes:
Machining: Use automatic or CNC lathes for precision cutting, which is suitable for the manufacture of complex-shaped parts.
Casting or pressure processing: Produce semi-finished products such as plates, bars, and pipes according to demand, and then form them through stamping, stretching, upsetting and other processes.
Welding and brazing: Soft soldering, brazing or spark welding can be used, but other welding methods (such as arc welding) should be used with caution.
Surface treatment
Degreasing and shot blasting: Remove surface impurities and improve cleanliness.
Phosphating treatment (outsourcing): Enhance corrosion resistance, usually completed in external collaboration.
Vulcanization and trimming: Improve wear resistance through the vulcanization process, and finally trim and package.
Auxiliary process
Banned mixing and open mixing: used for mixing rubber ingredients, suitable for composite structures containing rubber bushings.
2. Product advantages
Excellent processing performance
Excellent cutting performance: The design containing lead (3.4%~4.5%) makes its cutting efficiency reach 90% of free-cutting brass, suitable for high-precision processing.
Excellent cold processing performance: easy to stamp, stretch and other cold forming processes, suitable for complex parts manufacturing.
Excellent mechanical properties
High strength and hardness: After heat treatment, the tensile strength can reach 275~745 MPa, and the hardness range is HRB 7~97, which is suitable for high-load conditions.
Wear resistance and self-lubrication: The friction coefficient is as low as 0.016 (with lubricant), and the distribution of lead particles enhances the friction reduction performance and prolongs the service life.
Outstanding corrosion resistance
Excellent performance in seawater, atmosphere, acid and alkali environment, especially suitable for corrosive environments such as ships and marine engineering.
Multifunctional physical properties
Electrical and thermal conductivity: Inheriting the characteristics of copper-based materials, it has good electrical conductivity and is suitable for electrical connectors.
Low thermal expansion coefficient: reduces the impact of thermal stress and has high stability.
Wide applicability
Mainly used in mechanical parts such as bearings, bushings, gears, valve parts, and covers aviation, automobile, chemical and other fields.
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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