Wholesale Smooth Cusn12ni2 Cusn12 C82400/C82500 C82600/C82800 Shipbuilding Copper Nickel Lead-Phosphor Tin Bronze Bar

Tin Bronze Rods (C5191 / C5210 / C5240 etc.) – High-Performance Phosphor Bronze

Our tin bronze rods are manufactured from high-purity cathode copper and carefully selected tin and phosphorus using a continuous horizontal casting + multi-pass cold working + precision annealing process. This ensures fine grain structure, homogeneous microstructure, minimal segregation, and highly consistent mechanical and electrical properties.

Key Process Advantages

● Melting performed in medium-frequency induction furnaces with covered melting; oxygen content controlled below 10 ppm
● Precise temperature control of horizontal continuous casting mold results in surface and internal quality >30% better than national standards
● Total cold reduction ratio ≥85% across multiple passes, combined with intermediate annealing to eliminate internal stress; straightness ≤0.5 mm/m
● Batch-to-batch performance variation ≤3% (versus typical industry variation of ±8–10%)

Quality Control System

● Full suite of inspection equipment including SPECTRO direct-reading spectrometer (DE), Olympus metallographic microscope, universal testing machine, and eddy current flaw detector
● 100% inspection of chemical composition, microstructure, mechanical properties, electrical conductivity, and ultrasonic testing for every heat
● Third-party test reports (SGS / BV / TÜV etc.) available per EN, ASTM, JIS, or customer-specific standards
● Full traceability to raw material heat number; satisfies stringent audit requirements of automotive, connector, and power industries

Recommended for high-reliability applications including high-end connector springs, automotive relay contacts, heavy-current busbars, and precision instrument elastic components where fatigue life, stress relaxation resistance, and creep resistance are critical.
We specialize in supplying major industry clients with high-consistency, delivery-reliable premium tin bronze materials — no compromise on “good enough” performance.