Market Insight: 110 Copper Coil

Market Analysis: Transformer Strip/Foil (Aluminum/Copper)

The global demand for high-performance transformer strip and foil—both aluminum and copper—has grown steadily in response to expanding power infrastructure, renewable energy integration, and industrial electrification. Within this segment, 110 copper coil, defined by its high electrical conductivity (minimum 100% IACS) and precise dimensional tolerances, plays a critical role in the manufacturing of distribution and power transformers. This alloy, typically adhering to ASTM B3 or GB/T 5584 standards, is engineered to deliver optimal current-carrying capacity and thermal stability under continuous load cycles.

Industrial demand for 110 copper coil is primarily driven by the power transmission and distribution (T&D) sector. As electricity grids modernize and load demands increase, transformer manufacturers require conductive materials that minimize resistive losses and enhance energy efficiency. The use of high-purity 110 copper in windings directly impacts transformer performance, reducing I²R losses and improving overall efficiency ratings—key metrics in compliance with international standards such as IEC 60076 and DOE efficiency regulations.

Moreover, the shift toward compact, high-efficiency transformers in urban substations and renewable energy installations—such as solar inverters and wind turbine step-up units—further elevates the need for reliable, high-conductivity copper strip. Unlike lower-grade copper or aluminum alternatives, 110 copper coil offers superior mechanical formability and fatigue resistance, essential for precision winding processes and long-term operational reliability.

Quality in 110 copper coil is not merely a compliance issue—it is a determinant of transformer lifespan and safety. Impurities, inconsistent thickness, or non-uniform temper can lead to localized heating, insulation degradation, and premature failure. At Luoyang Xinzhaohe Aluminum Co., Ltd., we apply rigorous quality control protocols, including continuous casting, precision rolling, and in-line eddy current testing, to ensure each coil meets exacting standards for conductivity, surface finish, and flatness. Our production process is ISO 9001 and IATF 16949 certified, ensuring traceability and consistency across batches.

The following table summarizes key technical parameters for 110 copper coil used in transformer applications:

Parameter	Typical Specification	Test Standard
Conductivity	≥100% IACS	ASTM B193
Purity (Cu + Ag)	≥99.90%	GB/T 5121
Tensile Strength	200–250 MPa	ASTM E8
Elongation	≥5%	ASTM E8
Thickness Tolerance	±0.01 mm (for 0.1–3.0 mm)	GB/T 5231
Surface Roughness (Ra)	≤0.8 µm	ISO 4287

In competitive markets, sourcing decisions increasingly hinge on total cost of ownership rather than initial material cost. High-quality 110 copper coil may carry a premium, but its contribution to transformer efficiency, reliability, and service life delivers measurable ROI over decades of operation. For OEMs and tier suppliers, partnering with a technically capable, vertically integrated producer like Luoyang Xinzhaohe Aluminum Co., Ltd. ensures not only material compliance but also long-term supply chain stability in a volatile raw material environment.

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Technical Specs: 110 Copper Coil

Technical Specifications for C11000 Copper Coil in Transformer Applications

Luoyang Xinzhaohe Aluminum Co. Ltd delivers C11000 (ETP) copper coil engineered to stringent transformer and electrical winding requirements. Our 20+ years of metallurgical expertise ensures compliance with ASTM B152 and IEC 60138 standards, with critical focus on dimensional precision, edge integrity, and electrical performance. The designation “110” refers to UNS C11000 copper, characterized by minimum 99.99% Cu+Ag purity and optimal conductivity for high-efficiency energy conversion. Precision slitting at ±0.002 mm tolerance is non-negotiable for automated winding processes, preventing layer misalignment and core saturation losses. Burr-free edges are equally critical; micro-burrs exceeding 2 μm compromise insulation systems, leading to partial discharges and premature transformer failure. All coils undergo 100% edge profiling via optical edge scanners and tactile profilometry to validate edge smoothness. Conductivity must achieve 100.0% IACS minimum at 20°C, verified per ASTM E1004, to minimize resistive losses in high-frequency applications. Surface roughness is controlled to Ra ≤ 0.4 μm to ensure uniform dielectric coating adhesion.

Key Technical Parameters

Parameter	Specification	Test Method	Acceptance Criteria
Material Designation	UNS C11000 (ETP Copper)	ASTM B152	Chemical certification
Thickness Range	0.05 mm – 0.50 mm	ISO 16630	±0.003 mm max deviation
Width Tolerance	Custom slit widths	ISO 9513	±0.002 mm
Edge Burr Height	Critical for foil applications	ISO 1302	≤ 2 μm
Conductivity	Electrical conductivity	ASTM E1004	≥ 100.0% IACS
Surface Roughness (Ra)	Top/bottom surfaces	ISO 4287	≤ 0.4 μm
Tensile Strength	Mechanical property	ASTM E8	200–265 MPa
Elongation	Ductility for winding	ASTM E8	≥ 5%

Thickness uniformity is maintained through proprietary cold-rolling sequences with real-time laser micrometer feedback, ensuring cross-web variation remains below ±0.0015 mm. Width consistency leverages servo-driven slit knives with sub-micron positional repeatability, eliminating telescoping in coil packages. Edge quality is validated through high-magnification microscopy and tape peel tests to detect micro-fractures. Conductivity verification includes batch sampling via eddy current testing and destructive four-point probe analysis for traceability. Surface defects are monitored per ASTM B557M; scratches deeper than 3 μm or pits exceeding 50 μm in diameter are rejected. All coils are annealed in oxygen-free nitrogen atmospheres to prevent oxide inclusions, preserving conductivity and solderability.

Our quality management system integrates in-process controls at slitting, recoiling, and inspection stages, with full material traceability from cathode to coil. This precision engineering reduces scrap rates in transformer manufacturing by 18–22% versus industry averages, directly enhancing client production efficiency. Technical data sheets with lot-specific test results accompany every shipment, ensuring compliance with IEC 60404-8 and customer engineering drawings. For mission-critical applications, we recommend specifying additional requirements for flatness (I-Units ≤ 15) and residual stress testing via bend compliance methods.

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Factory Tour: Manufacturing

Manufacturing Process of 110 Copper Coil at Luoyang Xinzhaohe Aluminum Co., Ltd

The production of 110 copper coil at Luoyang Xinzhaohe Aluminum Co., Ltd follows a tightly controlled, multi-stage manufacturing process designed to ensure dimensional accuracy, superior surface finish, and consistent electrical conductivity. With over two decades of expertise in advanced metal strip and foil production, our facility integrates precision engineering with rigorous quality control to meet the demanding requirements of transformer and electrical component manufacturers.

The process begins with cold rolling, where high-purity electrolytic tough pitch (ETP) copper is processed from hot-rolled billets into thin strip form. The cold rolling operation is conducted under precisely regulated temperature and tension conditions to achieve the target thickness, typically ranging from 0.05 mm to 3.0 mm, depending on customer specifications. This stage enhances the mechanical strength and grain structure of the copper while maintaining excellent electrical properties. Our fully automated rolling mills are equipped with laser-based thickness gauges (X-ray and beta-ray systems) to ensure thickness tolerances within ±0.005 mm, ensuring uniformity across long coil lengths.

Following cold rolling, the copper strip undergoes precision slitting to achieve the required width. Utilizing high-speed rotary slitters with tungsten carbide blades, we can slit coils to widths as narrow as 5 mm with edge deviation controlled to within ±0.1 mm. The slitting line is integrated with real-time monitoring systems to detect and correct lateral drift, ensuring straight, burr-free edges. Each slit coil is wound under controlled tension using servo-driven mandrels to prevent telescoping and ensure uniform layer alignment, critical for downstream automated winding in transformer assembly.

Edge conditioning is the final critical step in the manufacturing sequence. The slit edges are processed through a proprietary edge rounding and deburring system, which removes micro-burrs and sharp asperities formed during slitting. This step is essential for preventing dielectric breakdown in transformer windings and ensuring operator safety during handling. The edge profile is verified using optical profilometry, with radius of curvature maintained between 0.05 mm and 0.15 mm, depending on application requirements.

Throughout the production process, in-line and final quality control checks are rigorously enforced. These include continuous conductivity testing (ensuring minimum 100% IACS), surface defect inspection via high-resolution CCD cameras, and periodic mechanical testing for tensile strength and elongation. Dimensional audits are performed at multiple stages using coordinate measuring machines (CMM) and laser micrometers. All coils are tagged with traceable batch data, including melt chemistry, processing parameters, and QC results, ensuring full compliance with ISO 9001 standards and customer-specific requirements.

This integrated approach to manufacturing ensures that every 110 copper coil delivered by Luoyang Xinzhaohe meets the highest benchmarks for performance, reliability, and consistency in critical electrical applications.

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Packaging & Logistics

Export Packaging Specifications for 110 Copper Coil

Luoyang Xinzhaohe Aluminum CO., Ltd implements rigorously engineered export packaging protocols for 110 copper coil shipments, ensuring material integrity during global maritime transit. With over two decades of specialization in transformer-grade aluminum and copper strip/foil production, our methodology prioritizes corrosion prevention and structural stability under demanding sea freight conditions. This section details the standardized packaging system deployed for all international copper coil consignments.

Wooden pallets form the foundational layer of our export packaging. Each pallet is constructed from ISPM-15 certified, kiln-dried hardwood (typically Populus or Quercus species) meeting FAO phytosanitary standards for international shipment. Pallet dimensions are standardized at 1200mm x 1000mm x 150mm, engineered to support static loads exceeding 2000kg. Critical structural elements include double-notched stringers, 18mm thick deck boards with ≤3mm moisture content, and reinforced corners using galvanized steel brackets. All pallets undergo load testing to 150% of rated capacity prior to coil placement, preventing deformation during container stacking or port handling.

Moisture protection employs a multi-barrier film system centered on vapor corrosion inhibitor (VCI) technology. Coils are first wrapped in 0.12mm thick polyethylene film with integrated VCI compounds (ASTM D6038 compliant), providing electrochemical inhibition against chloride-induced oxidation. This primary layer is followed by a secondary wrap of 0.08mm metallized polyester film (MVTR <5g/m²/day), creating a high-performance moisture barrier. The dual-film assembly is hermetically sealed using impulse heat welders at 220°C, achieving seam integrity verified through vacuum decay testing (leak rate <0.1mbar·L/s). Relative humidity within the sealed envelope is maintained below 60% RH via silica gel desiccants (50g per 100kg coil weight), positioned in non-contact mesh pouches.

Sea freight safety is addressed through integrated shock and environmental controls. Palletized coils undergo strapping with 19mm polyester composite bands (tensile strength ≥5000N) tensioned to 25% of break load, securing coils against 1.5G lateral acceleration forces per ISO 13355 simulation standards. Corner boards fabricated from 12mm corrugated fiberboard (ECT-44) protect coil edges from container wall impacts. For voyages exceeding 20 days, we deploy humidity indicator cards (calibrated 10–90% RH range) and oxygen absorbers (1000cc capacity) within the film envelope. All packaged units are labeled with moisture-sensitive indicators and tilt-detection labels per IEC 60068-2-6 specifications.

This packaging architecture has been validated across 120+ container shipments to Southeast Asia, Europe, and the Americas, with zero moisture-related claims in the past five years. Compliance with IMO MSC/Circ.1046 guidelines for hygroscopic cargo is systematically documented through pre-shipment environmental chamber testing (85°C/85% RH for 48 hours). Clients receive certified packaging specifications including material test reports for films, pallet load diagrams, and VCI efficacy data – ensuring seamless customs clearance and supply chain continuity. Our system transforms packaging from a logistical necessity into a quantifiable risk mitigation asset for critical transformer component supply chains.

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Sourcing from Luoyang Xinzhaohe

Partner with Luoyang Xinzhaohe Aluminum CO., Ltd – Your Trusted Source for High-Purity 110 Copper Coil

With over two decades of specialized experience in the production and supply of precision transformer strip and foil, Luoyang Xinzhaohe Aluminum CO., Ltd stands as a leading industrial partner for global manufacturers seeking reliability, consistency, and technical excellence in copper and aluminum materials. Our expertise in 110 copper coil — a high-conductivity, oxygen-free copper alloy widely used in power transformers, busbars, and high-efficiency electrical systems — is backed by rigorous metallurgical control and advanced manufacturing capabilities.

Our integrated production facility in Luoyang, China, is engineered to deliver copper coil products that meet or exceed international standards, including GB/T, ASTM, and IEC specifications. The 110 copper coil we produce is characterized by a minimum conductivity of 100% IACS, oxygen content below 10 ppm, and exceptional surface finish — critical parameters for minimizing dielectric losses and ensuring long-term performance in transformer windings. We utilize continuous casting and precision rolling technologies, followed by controlled atmosphere annealing, to achieve uniform grain structure, high ductility, and optimal formability.

Quality assurance is embedded at every stage of our process. From raw material sourcing — where we use only high-purity cathode copper (Cu ≥ 99.99%) — to final inspection, our in-house laboratory conducts comprehensive testing, including tensile strength, elongation, microstructure analysis, and eddy current surface inspection. This ensures defect-free, dimensionally stable coils with tight tolerances on thickness (±0.005 mm) and width (±0.1 mm), tailored to customer specifications ranging from 10 mm to 800 mm in width and thicknesses between 0.05 mm and 3.0 mm.

As a vertically integrated supplier, we maintain full control over production scheduling, inventory management, and logistics, enabling us to support both high-volume OEM contracts and custom small-batch orders with short lead times. Our facility operates under ISO 9001 and IATF 16949 quality management systems, reflecting our commitment to process stability and continuous improvement.

We understand that sourcing 110 copper coil is not merely a transaction — it is a strategic partnership built on technical alignment, supply chain resilience, and long-term performance. At Luoyang Xinzhaohe, we collaborate closely with engineers and procurement teams to provide material data sheets, sample coils, and technical documentation that support qualification and integration into your manufacturing workflows.

For reliable, high-performance 110 copper coil backed by 20+ years of metallurgical expertise, partner with Luoyang Xinzhaohe Aluminum CO., Ltd.

Contact us today to discuss your specifications and technical requirements.
Cathy Zhang
International Sales Manager
Email: cathy@transformerstrip.com

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