In the rapidly evolving landscape of precision engineering, the demand for materials that balance high electrical conductivity with superior machinability has never been higher. As a premier OEM sulfur copper alloy supplier, Sichuan Kepai New Material Co., Ltd. recognizes that traditional pure copper often falls short during high-speed CNC machining due to its ductility. This whitepaper explores how C14700 Sulfur Copper serves as the definitive solution for global exporters and precision component manufacturers.
Established in May 2017, Kepai New Materials has pioneered the R&D of special copper alloys. Our sulfur copper (C14700) is engineered by adding controlled amounts of sulfur to copper, creating a material that retains 90-95% IACS conductivity while offering a machinability rating of 80% compared to free-cutting brass. This allows for significantly faster spindle speeds, longer tool life, and exceptional surface finishes in complex electronic connectors and electrical switch components.
While Tellurium Copper (C14500) is widely known, Sulfur Copper (C14700) offers a cost-effective alternative for applications where peak machinability is required without the premium price of Tellurium. It provides excellent hot and cold workability and is particularly resistant to hydrogen embrittlement, making it a "hidden gem" for industrial gas nozzles and welding tips.
Located in Sichuan, China, we leverage a robust local supply chain of raw materials and state-of-the-art smelting technology. Our integrated production—from vacuum casting to precision drawing—ensures that every batch of sulfur copper meets international ASTM B301 standards.
Our independent R&D team focuses on "Oxygen-free high conductivity" variants. By minimizing oxygen content, we prevent the "copper disease" (hydrogen embrittlement) during brazing or welding, a critical factor for aerospace and medical applications.
We are certified by ISO9001:2015, ISO14001:2015, and OHSAS 45001:2018. For automotive clients, our adherence to high-quality standards ensures seamless integration into IATF 16949 supply chains for New Energy Vehicle (NEV) components.
The global shift toward electrification demands high-current connectors that can be mass-produced efficiently. Our sulfur copper alloy provides the perfect balance for charging pile terminals and battery interconnects, where high conductivity reduces heat generation, and high machinability allows for the complex geometries required in modern EV designs.
Environmental regulations like RoHS and REACH are pushing industries away from leaded alloys. Sulfur copper (C14700) is an environmentally friendly, free-cutting alternative to leaded brass (C36000) for many electrical applications, offering superior conductivity while remaining compliant with green manufacturing initiatives.
In medical imaging equipment (MRI/CT), non-magnetic and high-conductivity components are essential. Our oxygen-free sulfur copper ensures stable signal transmission and can be machined to micron-level tolerances for surgical instruments and diagnostic sensors.
Beyond conductivity, copper's antimicrobial properties and the precise machinability of C14700 make it ideal for high-contact medical device housings and internal connectors.
Optimized for system efficiency. Sulfur copper's thermal conductivity aids in heat dissipation within high-power density inverter modules.
Weight reduction and reliability are key. C14700 components used in generators and data transmission offer long-term stability under extreme vibration and temperature cycles.
Our alloys are treated for enhanced seawater corrosion resistance, vital for subsea sensors and offshore renewable energy connectors.
Established in May 2017, Sichuan Kepai New Materials Co., Ltd. is a high-tech private company specializing in R&D, production and sales of high conductivity and high strength free cutting tellurium copper and other special copper alloys. In addition to high share of the domestic copper alloy market, Kepai has exported to overseas clients with high reputation.
Our company has established its own independent R & D team, equipped with a complete production system and mature production technology. This allows us to have deep knowledge in the production of innovative products like highly conductive oxygen-free tellurium copper and sulfur copper.
A high-performance nickel-silicon precipitation strengthened alloy. It possesses high strength, excellent electrical conductivity, and outstanding softening resistance.
Typical tin-phosphorus bronze (CuSn4). High-performance elastic alloy, enhances strength, wear resistance and corrosion resistance.
The highest strength of all available copper-beryllium alloys. Ultimate tensile strength can exceed 200 ksi (1380 MPa).
Sulfur-containing, free-cutting copper alloy known for its excellent processability and good electrical conductivity. Ideal for production efficiency.
Partner with Sichuan Kepai for precision sulfur copper and tellurium copper alloys that drive manufacturing efficiency.
Kepai New Material
