Discover our industrial-grade metal sheets and functional panels manufactured to rigorous standards
Driven by precision metallurgy, advanced automation, and world-class raw material sourcing
In the modern industrial arena, copper is no longer viewed merely as a commodity metal, but as a critical enabler of the green transition, high-frequency telecommunications, and advanced power electronics. As power systems push toward megawatt densities and electric vehicle (EV) architectures shift toward 800V platforms, the demand for high-grade copper sheets and plates has experienced exponential growth.
Global market dynamics indicate a strategic pivot toward localized warehousing, custom alloy tailoring, and tight metallurgical control. Industries are moving away from standard, off-the-shelf formats in favor of OEM and ODM solutions that integrate directly into precision stamping, automated busbar welding, and specialized tooling lines. The strategic proximity of raw processing hubs, such as Ningbo, China, allows manufacturers to secure premium cathodes and process them through advanced rolling mills, ensuring stable supply chains and competitive cost structures.
How our custom-fabricated copper plates serve key high-reliability industries globally
Our ultra-flat C11000 ETP (Electrolytic Tough Pitch) copper plates form the backbone of high-capacity switchgears, electrical cabinets, and busway systems. Highly polished surfaces prevent corona discharge and localized heating under immense electrical stress.
Providing high-purity C10200 Oxygen-Free Copper (OFC) plates optimized for battery pack modules, heavy-duty battery terminals, and traction motor windings. Excellent laser weldability ensures void-free, low-resistance connections in electric vehicles.
Heavy-gauge copper grounding plates and busbar systems designed to handle surging currents in utility-scale solar farms and onshore/offshore wind turbine generators, guaranteeing continuous operational lifetimes under fluctuating loads.
We deliver copper plates customized to tight metallurgical tolerances, chemical compositions, and dimensions.
As a premier OEM/ODM copper plates supplier, our facility handles complex design requirements. Whether you require specific temper conditions ranging from dead-soft (O60) to extra-hard (H04), or custom geometric profiling via precision laser cutting, waterjet machining, and CNC drilling, we control the entire lifecycle of the material. By matching the chemical composition to standard or proprietary alloy codes, we ensure the thermal and electrical performance meets your specifications.
| Alloy Designation | UNS / DIN Code | Copper Content (Min %) | Electrical Cond. (% IACS) | Thermal Cond. (W/m·K) | Primary Industrial Application |
|---|---|---|---|---|---|
| ETP Copper | C11000 / Cu-ETP | 99.90% | ≥ 100% | 391 | Electrical busbars, switches, industrial electrodes, structural plates |
| Oxygen-Free Copper | C10200 / Cu-OF | 99.95% | ≥ 101% | 391 | High-vacuum electronics, semiconductor packaging, EV laser-welded busbars |
| Phosphorus Deoxidized | C12200 / Cu-DHP | 99.90% | 80% - 90% | 340 | Heat exchangers, condenser tubes, boiler plates, architectural cladding |
| Copper-Chromium-Zirconium | C18150 / CuCr1Zr | Balance (98.9%) | ≥ 80% | 320 | Resistance welding electrodes, high-stress electrical contacts, mold plates |
We specialize in applying secondary surface finishes to prevent environmental corrosion and contact resistance drop-off over long-term operations. Our finishing capabilities include:
From the massive industrial zones in Germany and Western Europe to high-tech manufacturing parks in the United States and Southeast Asia, localized engineering demands dictate strict adherence to safety and mechanical guidelines.
In North America, our industrial copper plates are tailored to match ASTM B152 standards, which govern specifications for copper sheets, strip, plates, and rolled bars. In Europe, materials comply with EN 1652, guaranteeing rigorous grain structure consistency and dimensional tolerances.
Furthermore, with international mandates requiring environment-friendly chemicals, all of our custom plates adhere strictly to the RoHS 3 (Restriction of Hazardous Substances) directive and REACH regulations. This makes them fully compliant for integration into electronic sub-assemblies shipped anywhere globally. Our localization support goes beyond documentation; we assist engineering teams during their initial design verification stage with localized prototype runs, chemical analysis certification sheets (MTRs), and custom shipping options.
Innovating metallurgical processes for next-generation industrial demands
Developing trace-element customized copper plates (such as copper-tellurium or copper-zirconium) to provide high electrical conductivity alongside improved mechanical machining characteristics, lowering CNC cycle times for OEMs.
Transitioning toward electric arc furnaces and hydrogen-assisted reduction processes to minimize the carbon footprint associated with smelting copper plates, aligning with the green mandates of global industrial companies.
Upgrading our cold rolling mills with real-time laser gauging technology to achieve ultra-fine thickness tolerances across entire rolls of copper plates, satisfying the demands of precision semiconductor mounting bases.
Answers to common engineering and sourcing questions about industrial copper plates
C11000 Electrolytic Tough Pitch (ETP) copper contains a small amount of oxygen (typically 0.02% to 0.04%) and has a minimum electrical conductivity of 100% IACS. It is the industry standard for general electrical applications. C10200 Oxygen-Free Copper (OFC) is refined in an oxygen-free environment to limit oxygen below 0.001%. OFC is highly resistant to hydrogen embrittlement when heated or welded, has a higher conductivity (101% IACS), and is preferred in vacuum electronics, high-vacuum seals, and critical laser-welding assemblies.
Copper is prone to oxidation in high-humidity marine environments. We apply a multi-tier protective regime: first, chemical passivation/anti-tarnish coating is applied; second, plates are wrapped in vacuum-sealed plastic films containing desiccants; third, they are secured on reinforced wooden crates with heavy cardboard spacers, protecting the edges and preventing moisture contact.
We provide full-service manufacturing, including precision sheet metal cutting, CNC routing, drilling, edge chamfering, press-brake bending, deep drawing, and complex assembly welding. We accept design files in STEP, DWG, and PDF formats to produce custom-dimensioned electrical connection parts directly.
Yes, every shipment is accompanied by a Mill Test Report (MTR) specifying the chemical composition (including trace impurities), mechanical properties (tensile strength, yield, elongation), and conductivity rating to verify compliance with international standards.
Ningbo Puppet Steel Co., Ltd. is a professional Steel Sheet Manufacturer | Cold Rolled, Hot Rolled & Galvanized Steel Supplier committed to providing high-quality steel products and customized metal solutions for customers worldwide. Serving industries such as construction, infrastructure, manufacturing, automotive, energy, home appliances, and industrial equipment, the company has built a strong reputation for reliable products and consistent service.
Located in Ningbo, China, Puppet Steel operates advanced processing and manufacturing facilities equipped with modern production lines and precision quality inspection systems. The company specializes in a comprehensive range of steel products, including cold rolled steel sheets, hot rolled steel sheets, galvanized steel sheets, galvalume steel sheets, prepainted steel sheets, carbon steel sheets, structural steel sheets, and customized steel processing solutions.
With extensive industry experience, the company offers flexible OEM and customized manufacturing services to meet various project requirements. From material selection and cutting to surface treatment and packaging, every production stage is carefully managed to ensure product consistency, dimensional accuracy, and long-term performance. Strict quality control procedures are implemented throughout the manufacturing process to comply with international standards and customer specifications.
Puppet Steel focuses on delivering durable, corrosion-resistant, and cost-effective steel products suitable for demanding applications in both domestic and international markets. The company maintains long-term partnerships with contractors, distributors, wholesalers, fabricators, and industrial manufacturers across North America, Europe, Southeast Asia, the Middle East, and other global regions.
Driven by innovation, quality, and customer satisfaction, Ningbo Puppet Steel Co., Ltd. continuously invests in technology upgrades and production efficiency improvements. Through competitive pricing, stable supply capacity, timely delivery, and professional technical support, the company strives to become a trusted global partner for steel sheet manufacturing and metal material solutions.
High-durability structural carbon steel plates, roofing, and architectural cladding boards
Puppet Steel