C14500 Tellurium Copper: The Perfect Balance of High Conductivity and Superior Machinability
Core Properties and Advantages
C14500 exhibits a machinability index of 80%–85% (using C36000 free‑cutting brass as the 100% benchmark), significantly higher than pure copper at 20%. Turning speeds can reach 1.8 to 2.2 times that of pure copper, with flank wear reduced by over 60%. The machined surface roughness can achieve Ra0.8μm, meeting precision fit requirements.
The alloy offers an electrical conductivity of 85%–98% IACS, notably superior to leaded brass (approximately 28% IACS). Below 100°C, its conductivity approaches that of oxygen‑free copper. Thermal conductivity is approximately 355 W/(m·K), making it suitable for applications involving high current‑carrying capacity combined with rapid heat dissipation.
Tensile strength ranges from 350 to 380 MPa, yield strength from 330 to 370 MPa, elongation from 9% to 12%, and hardness around 48 HRB. It exhibits good corrosion resistance, with a stable passive film in humid and weakly acidic media. Resistance to arc erosion is outstanding – under DC high‑current switching conditions, contact material loss is only one‑third that of pure copper.
Entirely free of lead, cadmium, and other hazardous elements, C14500 meets RoHS, REACH, and China's restrictions on hazardous substances in electronic products. It can be directly applied in drinking‑water contact parts and medical electronic devices.
Typical Application Fields
Charging gun terminals, charging pile power connectors, high‑voltage relay conductors – leveraging high conductivity and arc resistance to ensure long‑term plug‑in reliability.
RF connector housings, backplane pins, IC test socket contacts – precision machining ensures dimensional stability and low signal attenuation.
Plasma cutting nozzles, laser welding torch tips, resistance welding electrodes – combining thermal conductivity, erosion resistance, and easy replaceability, with service life 2–3 times longer than pure copper.
Starter switches, wiper motor commutators, fuel pump terminals – adaptable to vibration and temperature fluctuations.
Ball valve stems and water meter flow components that meet lead‑free regulations – offering machining accuracy and resistance to erosion and corrosion.