In the modern manufacturing landscape, the demand for materials that balance high electrical conductivity with superior machinability has never been higher. Sulfur Copper Alloy (UNS C14700) stands at the pinnacle of this intersection. As a premier Sulfur Copper alloy factory, Sichuan Kepai New Materials is redefining the performance benchmarks for high-speed CNC machining and electrical component reliability.
Sulfur copper is engineered by adding a controlled amount of sulfur to high-purity copper. This creates fine, uniformly distributed sulfur particles that act as chip breakers during machining, reducing tool wear and friction significantly compared to pure copper.
Unlike other free-cutting alloys that sacrifice electrical properties, C14700 maintains approximately 90-96% IACS conductivity. This makes it the "gold standard" for connectors, switchgear, and semiconductor components.
With a machinability rating of 85 (compared to Free-Cutting Brass at 100 and Pure Copper at 20), C14700 allows for higher spindle speeds and longer tool life, directly translating to lower production costs per part.
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, sulfur copper, and other special copper alloys.
Our focus is on delivering "Information Gain" to our partners through advanced material science. We don't just supply metal; we provide the foundation for technological breakthroughs in new energy vehicles, medical devices, and aerospace applications.
ISO 9001:2015 Certified
As we move toward Industry 5.0, the roadmap for sulfur copper alloys involves three critical pillars of innovation.
Utilizing vacuum induction melting (VIM) technology to reduce oxygen content to <5ppm, ensuring that our sulfur copper retains peak conductivity even under extreme thermal stress in power semiconductor applications.
Exploring the integration of sulfur at the nano-scale to improve grain boundary stability. This will enhance the "Softening Resistance" of copper alloys, crucial for components in next-gen EV charging stations.
Kepai is pioneering "Closed-Loop" recycling for high-performance copper. We help exporters recover sulfur copper chips and re-process them into high-grade raw materials without loss of integrity.
Sulfur copper's natural antimicrobial properties and ease of precision machining make it ideal for high-reliability medical connectors and surgical instruments where failure is not an option.
The core challenge of EVs is heat dissipation during rapid charging. Our C14700 and Tellurium Copper alloys provide the conductivity needed to manage high-current loads with minimal thermal rise.
Lightweighting and reliability are the twin pillars of aerospace. Kepai's alloys offer the necessary strength-to-weight ratio and corrosion resistance for satellite data transmission parts.
In an era of global uncertainty, Kepai offers a stable, vertically integrated supply chain. Our "Factory 4.0" initiative integrates real-time IoT monitoring across the production line.
Global enterprises are shifting toward High-Performance Copper Alloys to:
Sulfur Copper (C14700) is generally more cost-effective for large-scale production while maintaining high conductivity. Tellurium Copper (C14500) offers slightly better thermal resistance and is often preferred for high-amperage electrical connectors.
Yes. As a leading Sulfur Copper alloy exporter, Kepai ensures all our materials are tested and certified for international environmental compliance, making them safe for consumer electronics and medical use.
Absolutely. We provide customized rods, bars, tubes, and specialized profiles to meet your exact blueprints. Our CNC-ready materials are designed to minimize scrap and maximize your profit margins.
We use state-of-the-art optical emission spectrometers (OES) and eddy current testing to verify alloy purity and structural integrity for every single shipment.
Equipped with a complete production system and mature production technology, allowing deep knowledge in specialized alloy development.
Beyond traditional alloys, we developed highly conductive oxygen-free tellurium copper with lower resistance and better stability.
ISO9001:2015, ISO14001:2015, and OHSAS 45001:2018 certifications reflecting our high global standards.
We participate in the formulation of industry standards for tellurium and sulfur copper materials in the Chinese market.
Focus on environmentally friendly materials to reduce industrial impact and promote sustainable global manufacturing.
In addition to a high share of the domestic copper alloy market, Kepai has exported to overseas clients with a high reputation across Europe, Southeast Asia, and North America.
Kepai New Material
