Copper Phosphorus Ring is a ring-shaped metal component with copper as the base and phosphorus as the key alloying element, which is made by precision casting or forging process. Its core component usually contains 0.03%-0.35% phosphorus and ≥99.65% copper, which has high conductivity, corrosion resistance and mechanical strength. The addition of phosphorus significantly improves the copper's resistance to dezincification corrosion and optimizes the ductility of the material, making it a key connection or sealing component in the fields of electronics, machinery, chemical industry, etc.
| BrazingAlloys | AWS | Chemical Composition（%） | Solidus | Liquidus | Main Uses | |||||||
| Ag | Cu | P | Zn | Sn | Other | F | ℃ | F | ℃ | |||
| BCu93P | BCuP-2 | / | 93 | 7 | / | / | / | 1310 | 710 | 1460 | 795 | Suitable for copper and copper alloy,with good fluidity. |
| BCu86P | / | / | 86 | 7 | / | 7 | / | 1134 | 657 | 1270 | 687 | Mainly used for brazing of hard alloy cutter |
| BCu91PAg | BCuP-6 | 2 | 91 | 7 | / | / | / | 1190 | 645 | 1450 | 785 | Mainly used for brazing ferrous metals, nickel-based alloys and Cu-Ni alloys; it has good fluidity. |
| BCu89PAg | BCuP-3 | 5 | 89 | 6 | / | / | / | 1190 | 645 | 1325 | 720 | |
| BCu88PAg | BCuP-4 | 6 | 86.7 | 7.3 | / | / | / | 1190 | 645 | 1275 | 690 | |
| BCu80PAg | BCuP-5 | 15 | 80 | 5 | / | / | / | 1190 | 645 | 1300 | 705 | |
| BCu75PAg | BCuP-6 | 18 | 75.5 | 6.5 | / | / | / | 1190 | 645 | 1190 | 645 | |
Chemical composition: copper (Cu) ≥99.65%, phosphorus (P) 0.03%-0.35%, total impurities ≤0.02%
Physical properties:
Conductivity: ≥95% IACS (International Annealed Copper Standard)
Hardness: HV60-120 (Vickers hardness)
Tensile strength: ≥200 MPa
Elongation: ≥30%
Corrosion resistance: Corrosion rate in 3.5% NaCl solution ≤0.01 mm/year
Processing accuracy: inner diameter tolerance ±0.02 mm, roundness ≤0.01 mm
Features summary: Phosphor copper rings significantly improve the corrosion resistance and wear resistance of materials while maintaining high conductivity of the copper matrix by precisely controlling the phosphorus content, and are suitable for high-precision and high-reliability industrial scenarios.
Phosphor copper rings play a key role in many industries with their excellent comprehensive performance. The following are typical application scenarios and solutions:
Electronic and electrical industry
Application scenarios: As conductive connectors or sealing rings for motors, transformers, and switchgear.
Problem Solving: The high conductivity (≥95% IACS) and low contact resistance (≤0.002 Ω) of phosphor copper rings can reduce energy loss and improve equipment efficiency; its corrosion resistance ensures long-term stable operation in humid or chemical environments.
Mechanical Seals and Fluid Control
Application Scenarios: Sealing components for pumps, valves, compressors and other equipment.
Problem Solving: The hardness (HV60-120) and wear resistance of phosphor copper rings can withstand high-pressure fluid impact, and its anti-dezincification corrosion ability extends the seal life and reduces the risk of leakage.
Chemical and Energy Fields
Application Scenarios: As connecting rings or seals for heat exchangers and reactors.
Problem Solving: In chloride ion or acidic media, the corrosion rate of phosphor copper rings (≤0.01 mm/year) is much lower than that of pure copper, ensuring long-term safe operation of equipment and reducing maintenance costs.
Automotive and Aerospace
Application Scenarios: Conductive connections or sensor seals for engines and transmissions.
Problem Solving: The tensile strength (≥200 MPa) and elongation (≥30%) of phosphor bronze rings can adapt to high temperature and vibration environments, and their lightweight characteristics (density 8.9 g/cm³) help reduce energy consumption.
Medical Devices and Precision Instruments
Application Scenarios: Conductive or sealing components of hemodialysis machines and analytical instruments.
Problem Solving: The biocompatibility and high-precision processing (tolerance ±0.02 mm) of phosphor bronze rings meet the stringent requirements of medical equipment for safety and reliability.
Cleaning: Wipe with a soft cloth dipped in a neutral detergent and avoid using acidic and alkaline solvents.
Storage: Store in a dry environment (humidity ≤60%) and the temperature is controlled between -20℃ and +40℃.
Installation:
Ensure that the contact surface is flat to avoid scratching the surface of the phosphor bronze ring.
Torque Control: The recommended tightening torque is 10-15 N·m (adjusted according to specifications).
Regular Inspection: Check for corrosion or wear every 6 months and replace if necessary.
Q1: Will the conductivity of phosphor bronze rings be reduced due to phosphorus content?
A: When the phosphorus content is controlled at 0.03%-0.35%, the conductivity is still ≥95% IACS, and the effect on conductivity is minimal.
Q2: Can phosphor bronze rings be used in high temperature environments?
A: It can withstand high temperatures of 150℃ for a long time, and the short-term peak temperature can reach 250℃, but it needs to avoid oxidizing environments.
Q3: Is the corrosion resistance of phosphor bronze rings better than brass?
A: Yes, the corrosion rate of phosphor bronze rings in chloride ion environments is only 1/10 of that of brass.
Q4: How to ensure the processing accuracy of phosphor bronze rings?
A: Using CNC turning or cold heading technology, the inner diameter tolerance can reach ±0.02 mm and the roundness ≤0.01 mm.
Q5: How to evaluate the life of phosphor bronze rings?
A: Under standard working conditions, the service life of phosphor bronze rings can reach more than 10 years, depending on the application environment.
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