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Our Wear-Resistant Phosphor Bronze Rod is specifically optimized for precision electronic components that require low friction, high conductivity, and long-term reliability.
Product Description
This C51000 alloy rod (composed of 94.8% Cu, 5% Sn, and 0.2% P) undergoes a controlled annealing process to deliver exceptional fatigue resistance, making it ideal for long-service electronic applications where performance degradation is not acceptable .
Parameter | Value |
Material | ASTM C51000 Phosphor Bronze (phosphor-deoxidized for conductivity) |
Diameter Range | 3mm - 100mm (with straightness tolerance of 0.5mm/m) |
Hardness | HV150 - 200 (after stress-relief annealing) |
Electrical Conductivity | 15 - 20% IACS (ideal for electrical contact applications) |
Thermal Conductivity | 60 W/m·K (effective heat dissipation in electronics) |
Tolerance | ±0.02mm (for diameters ≤50mm); ±0.05mm (for larger diameters) |
• Superior wear resistance for sliding electrical contacts, reducing contact resistance over thousands of cycles
• Excellent spring characteristics that maintain contact force in connector components despite repeated mating cycles
• High resistance to stress relaxation at elevated temperatures (up to 120°C), ensuring long-term performance
• Precise machinability for creating micro-components with tight tolerances, suitable for miniaturized electronics
• Non-magnetic properties, eliminating interference in sensitive electronic circuits
Essential for electrical connectors in consumer electronics (smartphones, laptops), switch contacts in automotive infotainment systems, relay springs in industrial control panels, and sensor terminals in medical diagnostic equipment. Widely used in automotive electronics (ECUs, sensors) and industrial control systems where reliability and conductivity are critical .
Q: What makes this better than brass for electronics?
A: It offers 30% higher fatigue life and better retention of spring properties over temperature cycles, reducing failure rates in long-service applications.
Q: Is this material RoHS compliant?
A: Yes, it meets all RoHS and REACH requirements for electronic components, with no restricted substances above threshold limits.
Q: Can you supply rods with specific surface treatments for soldering?
A: Yes, we offer pre-tinned and pre-fluxed surface options to facilitate automated soldering processes.
| Phosphor bronze alloy series composition,%max | |||||||
| Type | Cu（%） | Pb（%） | Fe（%） | Zn（%） | P（%） | Ni（%） | Sn（%） |
| QSn6.5-01 | Other | 0.02 | 0.05 | 0.3 | 0.10-0.25 | 0.2 | 6.0-7.0 |
| QSn4-0.3 | Other | 0.05 | 0.1 | 0.3 | 0.03-0.35 | 0.2 | 3.5-4.9 |
| QSn4-4-4 | Other | 3.5-4.5 | 0.05 | 3.0-5.0 | 0.03 | 0.2 | 3.0-5.0 |
| C51000 | Other | 0.05 | 0.01 | 0.3 | 0.03-0.35 | 0.3 | 3.5-5.0 |
| C54400 | Other | 3.5-4.5 | 0.1 | 1.5-4.5 | 0.01-0.5 | 0.2 | 3.5-4.5 |
| C51900 | Other | 0.2 | 0.05 | 0.3 | 0.1-0.25 | 0.2 | 6.0-7.0 |
