Best High Purity Oxygen-Free Copper Supplier & Factories

Global Authority in C10100 & C10200 Oxygen-Free High Conductivity (OFHC) Alloys, Pioneering Next-Gen Electrical Engineering & New Energy Systems

High-Purity Oxygen-Free Copper (OFC) Metallurgy Whitepaper

Unraveling the physics of absolute purity, low oxygen limits, and electrical conductivity metrics required for global industrial excellence.

High-purity Oxygen-free copper (OFC), specifically categorized under standard designation C10100 (OFE - Oxygen-Free Electronic) and C10200 (OF - Oxygen-Free), represents the apex of electrical and thermal conductance in engineering metallurgy. Traditional electrolytic tough pitch (ETP) coppers contain up to 0.04% oxygen, existing mostly as cuprous oxide (Cu2O) inclusions. These microscopic inclusions severely compromise structural integrity, cause hydrogen embrittlement when exposed to reducing atmospheres at elevated temperatures, and reduce electrical conductivity.
Critical Standard Reference: C10100 vs. C10200
ASTM B170 Grade 1 (C10100): Pure copper content ≥ 99.99%, Oxygen content ≤ 5 ppm (0.0005%), total trace impurities (including lead, sulfur, bismuth, arsenic, and iron) ≤ 100 ppm.
ASTM B170 Grade 2 (C10200): Pure copper content ≥ 99.95%, Oxygen content ≤ 10 ppm (0.0010%), no specific trace element limitation but must exhibit ≥ 100% IACS conductivity.
For semiconductor fabrication, relativistic particle accelerators, and superconducting systems, any trace contamination can degrade performance. Sichuan Kepai New Material Co., Ltd. addresses this through high-vacuum induction melting (VIM) processes. This controls volatile impurity elements and limits dissolved gases, preventing chemical reactions that cause microscopic voids during hot working and drawing.

About Sichuan Kepai New Material Co., Ltd.

Established in 2017, Sichuan Kepai New Material Co., Ltd. is a high-tech manufacturing enterprise integrating research and development, metallurgy, processing, and sales of high-performance copper alloys. Operating from a modern 9,000 square meter factory in Sichuan, China, we produce advanced materials key to telecom networks, power grids, and precision machinery.

Our strategic layout focuses on materials prioritized in national industrial planning. This includes high-conductivity oxygen-free copper, tellurium copper (C14500), silver copper, and dispersion-strengthened copper alloys. We provide custom materials engineered for high-tech applications, including new energy vehicles (NEVs), 5G networks, precision laser cutting systems, and high-voltage relays.

Located in the Guanghan Industrial Development Zone near National Highway 108, our facility integrates raw casting with advanced testing laboratories. This infrastructure ensures consistent, high-purity alloy production.

Sichuan Kepai New Material Production Facility
2017
Established Year
Over half a decade of technical innovation in advanced copper metallurgy.
9,000 m²
Factory Area
State-of-the-art production floor featuring vacuum induction melting and automated drawing lines.
1,000 m²
Office & Laboratory
Dedicated facility for R&D engineers, metallurgists, and ISO-certified QA inspectors.

Company Strengths & Technological Innovation

Why global OEMs choose Sichuan Kepai as their long-term supply partner for high-purity copper alloys.

Technical Strength

Our R&D team consists of experienced materials scientists and metallurgists. Through in-house research and partnerships with academic institutions, we maintain proprietary manufacturing processes for tellurium copper, sulfur copper, and lead-free copper. Our technical solutions aim to balance high conductivity with machinability, reducing processing tool wear for manufacturers.

Product System

Kepai offers a comprehensive range of materials, including pure copper (C11000), oxygen-free copper (C10100/C10200), high-conductivity tellurium copper, nickel tellurium copper, tin bronze, beryllium copper (C17200/C17300/C17500), and leaded bronze. This diverse catalog allows sourcing managers to acquire materials optimized for both standard electrical components and high-precision aerospace parts from a single supplier.

Market Layout

Under the strategy "rooted in Sichuan, radiating nationwide, and moving towards the world," we serve customers in Europe, North America, East Asia, and Southeast Asia. We establish long-term logistics partnerships to provide reliable delivery and technical support to global manufacturing hubs.

Corporate Culture & Sustainable Vision

We operate based on the principles of "integrity, innovation, collaboration, and mutual benefit." In addition to technical performance, Kepai prioritizes environmental standards. By optimizing metallurgy processes to reduce energy consumption and recovering clean, sorted production scrap internally, we help customers meet their scope 3 emissions targets and ESG compliance mandates. We believe in providing reliable, long-term support for industrial upgrading.

The Chinese Supply Chain Advantage

How Sichuan Kepai integrates raw material access, processing efficiency, and shipping infrastructure to support global industries.

China produces and consumes a major portion of the world's refined copper and high-end copper alloys. This industrial concentration creates a strong supply chain ecosystem. Sichuan Kepai leverages this environment to manage raw material supply, processing, and transportation efficiently.
Unlike processing plants that source intermediate billets, Kepai's facility integrates smelting, extrusion, drawing, and final finishing under one roof. This configuration reduces logistical costs between processing steps and minimizes the risk of external particulate contamination during intermediate stages. The proximity of our plant in the Sichuan Guanghan Industrial Development Zone to national highway networks and key rail terminals supports transport to coastal ports, ensuring efficient logistics for international shipments.
Supply Chain Resiliency Highlights
  • Integrated Metallurgy: Direct control of oxygen limits (<5ppm) from the furnace to the final drawn bar.
  • Stable Raw Material Access: Sourcing high-purity copper cathodes directly from major domestic smelters to ensure material consistency.
  • Custom Sizing & Formats: Capabilities to draw and extrude custom rods, hollow sections, sheets, and wire profiles on demand.
  • Traceable Batches: Production runs are documented with spectral chemical analysis for quality verification.

Advanced Manufacturing & Quality Inspection Infrastructure

Our facility uses precise manufacturing equipment and testing instruments to ensure every batch meets required engineering specifications.

Smelting Furnace
Smelting Furnace
Laying-off Machine
Laying-off Machine
Extrusion Line
Extrusion Line
Drawing Equipment
Drawing Equipment
Straightening Machine
Straightening Machine
Packaging Line
Packaging Line
Eddy Current Conductance Instrument
Eddy Current Conductance Instrument
Chemical Composition Test Room
Chemical Composition Test Room
Metallographic Sample Polishing Machine
Metallographic Polishing Machine
Electro-Hydraulic Servo Universal Testing Machine
Servo Universal Testing Machine
LCD Electronic Universal Testing Machine
Electronic Universal Testing Machine
Hardness Tester
Hardness Tester

Global Procurement, Local Support & Compliance Assurance

Meeting international engineering standards and offering localized logistical support to streamline global procurement.

Sourcing technical raw materials globally requires compliance with safety, environmental, and engineering standards. Sichuan Kepai implements QA processes to verify compliance with international regulations, including RoHS (Restriction of Hazardous Substances) and REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals). We maintain records tracking raw copper materials to confirm they are conflict-free.
To support our international buyers, we provide localized support through:

Customs & Logistical Management

Our export department handles ocean, air, and rail freight logistics. We prepare necessary export documentation, certificates of origin, and custom declarations to prevent delays at international ports.

Anti-Oxidation Packaging

High-purity oxygen-free copper is sensitive to moisture and oxidation. We package export shipments using vacuum sealing, desiccants, and reinforced wooden crates to maintain surface quality during ocean transport.

Traceable Documentation

Every shipment includes a Mill Test Certificate (MTC) detailing chemical composition (down to ppm levels for oxygen and trace elements), hardness, tensile strength, and IACS electrical conductivity.

Authorized Certification

Verified manufacturing systems and product compliance documentation.

ISO Quality Standard Certificate
Compliance Certification Doc
Product Quality Verification
Environmental System Standard
Authorized Testing Report
Export Clearance Authorization
SGS Compliance Audit Record
Metallurgical Inspection Document

Industrial Trends & Localization Applications

Exploring the demand drivers for oxygen-free copper across advanced technology sectors.

The global transition toward electrification, high-frequency telecommunications, and high-power electronics has increased demand for oxygen-free high-conductivity (OFHC) copper. Key applications driving this demand include:

1. Electric Vehicles & Power Electronics

New Energy Vehicles (NEVs) use high-voltage lithium battery relays, busbars, and rapid charging infrastructure. These components handle high current densities. High-purity OFC reduces thermal losses and prevents failure under high electrical loads.

2. 5G/6G & High-Frequency Communication

In high-frequency transmission, current travels primarily along the surface of the conductor (the skin effect). Impurities or cuprous oxide inclusions in standard copper can cause signal attenuation and phase distortion. High-purity C10100 is selected for coaxial cables, waveguide tubes, and base station transmitters to maintain signal integrity.

3. Vacuum Electronics & Superconductors

For vacuum electronics, high-voltage switches, and cryogenic equipment, oxygen-free copper is used to prevent hydrogen embrittlement. Standard ETP copper exposed to trace hydrogen gas at high temperatures can form steam pockets within the metal, causing cracking. OFC prevents this failure mode.

Frequently Asked Questions (FAQ)

Technical and procurement answers from our metallurgical engineering team.

What is the difference between C10100 and C11000 copper?
C10100 is Oxygen-Free Electronic (OFE) copper with 99.99% purity and less than 5 ppm oxygen content. C11000 is Electrolytic Tough Pitch (ETP) copper with 99.90% purity and up to 400 ppm (0.04%) oxygen content. C10100 provides higher electrical conductivity (typically 101% IACS) and is resistant to hydrogen embrittlement, whereas C11000 can suffer from hydrogen embrittlement when worked at high temperatures in reducing environments.
Why is oxygen content critical for high-vacuum electronic components?
In high-vacuum environments, residual oxygen or trace gas inclusions can outgas under thermal load, compromising the vacuum seal. In addition, when exposed to high voltages, surface oxides can cause localized arcing. C10100 is processed under high vacuum to limit these issues.
Does Sichuan Kepai offer custom alloy compositions?
Yes. Our casting shop can produce custom alloy formulations, adjusting ratios of tellurium, silver, tin, nickel, chromium, zirconium, and beryllium. We also extrude and draw profiles to customer-specified cross-sections, reducing machining waste.
How does Kepai prevent surface oxidation during international shipping?
We package materials for export using VCI (Volatile Corrosion Inhibitor) films, desiccants, vacuum sealing, and robust moisture-proof wood packing to protect the surface finish during ocean freight.
What testing documentation is provided with each delivery?
Every shipment includes a Mill Test Certificate (MTC) detailing the production batch number, chemical composition breakdown (including oxygen levels), hardness, tensile strength, and measured electrical conductivity (IACS).
Are Kepai products compliant with RoHS and REACH standards?
Yes. All materials comply with EU RoHS and REACH regulations. We provide certified compliance reports from independent testing agencies like SGS to verify compliance.

GET STARTED TODAY

Looking ahead, Sichuan Kepai New Materials Co., Ltd. will continue to focus on research and manufacturing in the field of new materials, contributing to the development of the high-conductivity copper alloy industry. We look forward to cooperating with global partners to support advanced engineering applications.