C14420 tellurium-tin-copper strip Performance Analysis
C14420 is a Cu-Te-Sn ternary alloy copper strip optimized for performance through the synergistic interaction of tellurium (Te) and tin (Sn). The alloy is designed for high electrical conductivity, corrosion resistance, abrasion resistance and high temperature stability for use in marine environments, electrical contacts and precision electronics.
Core Performance Characteristics
Conductivity:
Conductivity ≥ 88% IACS (International Annealed Copper Standard), higher than tin bronze (CuSn0.15, 85% IACS) and close to tellurium copper (CuTe0.5, 92% IACS). The addition of tellurium reduces the scattering of electrons by tin, balancing electrical conductivity and corrosion resistance.
Mechanical properties:
Tensile strength ≥320 MPa, yield strength ≥180 MPa, elongation >35%, supports complex molding (e.g., deep-drawing, bending).
Corrosion resistance:
Neutral salt spray test (1000h) no corrosion, seawater immersion test (30 days) weight loss <0.5mg/cm², better than ordinary brass. Tellurium and tin form a dense oxide film, inhibiting chloride ion erosion.
Abrasion resistance:
Friction coefficient <0.2 (dry friction), wear (10⁶ cycles) <0.1mm³, suitable for high-frequency plugging or sliding contact scenarios.
High temperature stability:
Softening temperature >380°C, conductivity retention >85% at high temperature (200°C), superior to tin bronze (softening temperature <250°C).
Performance Comparison
Parameter
C14420
CuSn0.15
CuTe0.5
Conductivity 88% IACS 85% IACS 92% IACS
Tensile strength ≥320 MPa 250-300 MPa 350-400 MPa
Corrosion resistance Excellent (1000h no corrosion) Good (500h no corrosion) Fair (plating required)
Softening temperature >380°C <250°C >400°C
Typical application scenarios
Marine equipment:
Marine electrical connectors (salt spray and vibration resistant), underwater sensor housings (seawater corrosion resistant).
Electrical contact:
Relay reeds (good arc extinguishing performance, stable contact resistance), charging pile contact terminals (current-carrying density >5A/mm²).
Precision electronics:
High-frequency switch contacts (wear-resistant, low contact noise), flexible circuit board shielding layer (etching accuracy ± 0.03mm).
Industrial Sensors:
Pressure sensor elastic elements (temperature coefficient <0.004/°C), gyroscope rotors (high dimensional stability).
Technical Advantages
Synergistic strengthening: Tellurium enhances recrystallization temperature, tin enhances corrosion resistance, and overall performance is superior to single alloyed copper.
Process suitability: Rollable to 0.1mm ultra-thin, supports laser welding and chemical etching, and is suitable for automated production lines.
Cost-effective: 70% lower cost than silver copper (CuAg0.1), conductivity up to 85%, suitable for large-scale applications.
Conclusion: C14420 Tellurium Tin Copper Strip is a balanced choice for electrical conductivity, corrosion resistance, wear resistance and processability, especially suitable for marine environments, high-frequency contact and precision electronics, and is an upgraded alternative to traditional copper alloys.
