Surging Copper Prices Spur Substitution Opportunities: Suzhou Daiming’s Enameled Aluminum Wire Leads the Market with Strong Core Competitiveness

Recently, global copper prices, a key non-ferrous metal, have been soaring continuously. Industry data indicates that the copper supply gap will further widen over the next three years, placing severe cost pressures on downstream industries such as motors, home appliances, and new energy. Against this backdrop, aluminum’s advantages in cost-effectiveness and lightweight properties as a raw material for enameled wires have become increasingly prominent. Suzhou Daiming Electrical Materials Factory, a specialist in Enameled Aluminum Wire, has emerged as a core supplier of alternative solutions for the industrial chain, providing critical support for cost reduction and efficiency improvement through its stringent full-process quality control system, impressive market expansion results, and precise downstream scenario adaptation capabilities.

Quality Foundation: Three-Stage Inspection & Precision Testing, Performance Meets National Standards

Suzhou Daiming prioritizes product quality as its core competitiveness, strictly manufacturing 180-class polyesterimide enameled aluminum wire in compliance with GB/T23312.5-2009 (equivalent to the international standard IEC 60317-0-3) and establishing a full-process quality control system covering raw materials to finished products. On the production side, high-purity aluminum rods with a purity of ≥99.7% are selected as the base material. Through precision extrusion and multi-layer coating processes, the product achieves a conductivity of 61% IACS (International Annealed Copper Standard), meeting the current transmission requirements of high-efficiency motors. The enamel insulation layer is made of high-quality polyesterimide resin, forming a dense insulating structure after high-temperature curing, with a breakdown voltage of ≥8kV/mm. No blistering or peeling occurs after a thermal shock test at 220℃ for 30 minutes, and the insulation resistance retention rate exceeds 90% after 5,000 hours of thermal aging.

Backed by a complete set of precision testing equipment, the factory has implemented a rigorous three-stage quality inspection mechanism, conducting a series of tests on every batch from each production line on a daily basis:

• Incoming raw material inspection: The QJ57 Type DC Resistance Bridge is used to verify the purity and conductivity of aluminum rods.

• In-process sampling inspection: Every 2 hours during production, samples are tested using the Enameled Wire Outer Diameter Tester to control diameter tolerance within ±0.002mm, the ZDG-25 Intelligent Unidirectional Paint Scraping Tester to assess enamel adhesion, and the SC-5 Elongation Tester to check flexibility (no cracking when wound at 6 times the conductor diameter, with an elongation rate of ≥30%).

• Final finished product inspection: Before delivery, 12 key indicators are fully tested using advanced equipment including the Enameled Wire Thermal Endurance Class Precision Tester (boasting industry-leading accuracy), ZGQ-16B Automatic High-Voltage Enamel Continuity Tester, and Voltage Breakdown Tester.

Currently, the batch qualification rate of the factory’s enameled aluminum wire has stabilized at over 99.8%, with key performance indicators meeting or even exceeding those of some Enameled Copper Wire products.

Notably, the factory pursues zero-defect quality control with an uncompromising commitment to quality. All inspection data is digitally recorded and traceable for 5 years. All testing equipment is calibrated annually by authorized third-party institutions, and the quality inspection team consists of certified engineers with over 10 years of industry experience, ensuring stable product quality from the source.

Market Breakthrough: Presence in 18 Countries & Order Surge, New Energy Sector as Growth Engine

Leveraging its stable quality and cost advantages, Suzhou Daiming’s enameled aluminum wire has achieved breakthroughs in both domestic and international markets. Domestically, the product is widely supplied to leading home appliance and new energy enterprises in the Yangtze River Delta and Pearl River Delta regions, serving as a core supplier of high-efficiency air conditioner compressors for renowned brands like Midea and Gree. Domestic home appliance orders surged by 32% year-on-year in the first half of 2025. Internationally, the product has been exported to 18 countries and regions across Southeast Asia, the Middle East, and South America, with particularly strong demand in countries along the Belt and Road. Long-term supply agreements have been signed with multiple new energy vehicle manufacturers in Vietnam and India for drive motor production, with overseas order volume exceeding RMB 20 million in the third quarter of 2025 alone.

Amid the upward trend in copper prices, the cost advantage of enameled aluminum wire has become even more pronounced. Compared with enameled copper wire, Suzhou Daiming’s enameled aluminum wire reduces raw material costs by more than 40%, helping customers cut material costs by 29%–35% in motor production. This edge has attracted a growing number of small and medium-sized motor enterprises to switch suppliers in bulk. Data shows that the factory’s overall order volume increased by 54% year-on-year in 2025, with the fastest growth of 67% recorded in the new energy vehicle and photovoltaic inverter sectors.

Value Adaptation: Scenario-Based Solutions Empower Cost Reduction & Efficiency Improvement Across Multiple Industries

Based on downstream industry demands, Suzhou Daiming has developed a diversified product portfolio of enameled aluminum wire for precise scenario adaptation. In the new energy vehicle sector, the 180-class heat-resistant enameled aluminum wire leverages its lightweight advantage (with a density only one-third that of copper) to reduce drive motor weight by 30%, perfectly aligning with the automotive lightweight trend. It has been mass-applied in flat wire motors of overseas automakers, with a single motor usage of 12.5kg. In the photovoltaic inverter sector, products optimized for 1500V systems deliver a breakdown voltage of up to 10kV/mm, meeting insulation requirements for high-voltage scenarios and earning qualification as a supplier for leading enterprises like Huawei and Sungrow, with procurement volume rising by 32.5% year-on-year.

The product also excels in home appliances and power equipment applications:

• In air conditioner compressors, it reduces unit costs by RMB 150–200 while maintaining equivalent cooling efficiency.

• In UHV transformers, its low resistance imbalance rate (≤2%) and excellent solvent resistance enhance equipment operational stability, and it has now been included in the procurement system of State Grid Corporation for transformers above 750kV.

In addition, to meet the energy efficiency upgrading needs of industrial motors, the factory has launched 200-class high-temperature resistant products compatible with IE4/IE5 high-efficiency motors, reducing energy consumption by 8% compared with traditional products.

Faced with the dual opportunities of high copper prices and the rapid development of the new energy industry, Suzhou Daiming Electrical Materials Factory will continue to deepen technological innovation, optimize production processes, and expand high-end application scenarios such as aerospace and energy storage. With more competitive enameled aluminum wire products, the factory is committed to providing global customers with solutions characterized by reliable quality, cost optimization, and scenario adaptability, helping the industrial chain achieve the dual goals of green low-carbon development and cost-efficiency enhancement.