Qsn6.5-0.1 Phosphor Bronze Copper Rods Copper Alloy Wear Resistant Easy to Turn Copper Bar Aluminium Bronze
Phosphor Bronze Bar (C54400 / C51000 / C51100 / C51900 / C52100, etc.)
Our phosphor bronze bars are manufactured by horizontal continuous casting followed by multi-pass cold working and precision straightening process. This ensures fine grain structure, uniform microstructure, and elimination of typical casting defects such as porosity and inclusions.
Chemical composition is tightly controlled within GB/T 5231 or ASTM B139 specifications. Tin variation is kept within ±0.15%, phosphorus precisely maintained between 0.03-0.35% to achieve optimal combination of elasticity, fatigue resistance and avoidance of cold brittleness caused by excessive phosphorus.
Key Process Advantages
● Horizontal continuous casting with high-purity graphite die and water-cooled copper jacket for rapid solidification and minimal segregation
● Total cold reduction ≥85% with multiple intermediate annealing cycles to fully release internal stress
● Final straightness ≤0.5 mm/m
● 100% eddy current testing + random ultrasonic inspection to guarantee freedom from internal micro-cracks
● Surface finish Ra ≤1.6 μm; bright annealing or anti-tarnish coating available upon request
Quality System & Traceability
Operated under IATF16949-certified quality system with full batch traceability. Each shipment is accompanied by:
● Original melt chemical analysis report
● Mechanical property test report
● Metallographic structure report
● Dimensional inspection report
Critical properties (hardness, electrical conductivity, elastic modulus) are controlled within ±5% batch-to-batch, meeting the most demanding requirements of high-reliability connector contacts, relay springs, automotive terminals and precision instrument components.
Available sizes: Φ3.0–Φ120 mm Regular stocked grades: C54400, C51000, C51900 Custom grades and profiles available on request Minimum lead time: 7–10 days Maximum single-lot capacity: 30 tons
