The surface quality of 3003 aluminum-manganese alloy circles directly determines the yield rate of subsequent processes such as anodizing, coating, and polishing. For applications with stringent aesthetic requirements—such as cookware, decorative hardware, and lighting reflectors—even the slightest surface scratch can be magnified during processing, resulting in visible streaks or patterns that render the finished product unusable. Haomei Aluminum has developed specialized, surface no scratch 3003 aluminum circles for high-end applications. By implementing protective measures at every stage—from rolling and blanking to final delivery—we provide a reliable foundation for the mass production of our clients' premium products.
End-to-end, closed-loop control system is the key to achieving a no scratch surface.
During the rolling process, we utilize high-precision mirror-finish work rolls with a surface roughness (Ra) of ≤0.2μm. A closed-loop, constant-tension control system is maintained throughout rolling to prevent scuffs or scratches caused by strip deviation. Furthermore, neutral interleaving paper is placed between the layers of the aluminum coil to completely eliminate fine scratches resulting from inter-layer friction. Before leaving the factory, every coil undergoes rigorous surface sampling to ensure the absence of continuous scratches, roll marks, or indentations.
The blanking process utilizes precision progressive dies, with the blanking clearance strictly controlled at 5%–8% of the sheet thickness to prevent burrs on the cut edges from scratching the sheet surface. Throughout the loading and unloading stages, vacuum suction cups are used for non-contact transfer, completely eliminating the risk of scratches caused by mechanical fixtures or grippers.
Following production, each piece undergoes an in-line visual inspection; the system achieves a 100% detection rate for visible scratches ≥0.5 mm in length, with a defect rate of ≤0.1% within the effective surface area—a performance far superior to general industry standards.
Before delivery, the scratch-free 3003 aluminum circles undergo multi-layered protective treatment. The aluminum discs are subjected to multi-stage alkaline degreasing, ensuring a residual oil content of ≤5 mg/m² and a surface cleanliness level that passes the "water-break-free" test. Immediately after cleaning, both sides are covered with a protective PE film. For stacking, EPE (expanded polyethylene) foam sheets are placed between the discs. The final export packaging consists of a waterproof inner lining and a fumigated solid-wood pallet, designed to withstand the vibrations, friction, and moisture encountered during long-distance ocean transport, ensuring a surface integrity rate of ≥99.9% upon arrival.
Beyond superior surface quality, Haomei 3003 aluminum circles meet the ASTM B209 international standard for core performance metrics. Alloy composition is maintained within a tight range, with manganese content stabilized at an optimal 1.0%–1.5%. In the O-temper (fully annealed), 3003 alloy exhibits an elongation after fracture of ≥25% and an Erichsen cupping test (IE) value of ≥9.5 mm. This ensures stable deep-drawability, making the material suitable for various forming processes, including deep drawing and metal spinning. Surface roughness is consistently controlled within the range of Ra 0.4–0.8 μm; following subsequent anodizing, the resulting oxide layer is uniform and free of color variation, with coating adhesion reaching the Grade 0 standard. This allows the material to proceed directly to surface treatment without the need for additional polishing.
Over more than a decade in the industry, I have observed that many clients experienced high scrap rates—consistently ranging from 3% to 5%—because even minor scratches on standard aluminum circles resulted in visible marks on the final stamped parts. By switching to our scratch-free aluminum circles products, these losses can be reduced to under 0.2%, ultimately leading to a more cost-effective overall production process.
No scratch aluminum circle series is ideally suited for applications requiring high surface quality, such as exterior components for premium cookware, decorative anodized hardware, lighting reflectors, and high-grade road signage. We offer standard thicknesses ranging from 0.5 mm to 4.0 mm and diameters from 100 mm to 900 mm. We also provide customization for various tempers—including O, H12, and H14—and can tailor surface roughness and protective measures to meet your specific manufacturing requirements.
As a direct manufacturer, Haomei Aluminum ensures stable, large-scale supply. Every shipment includes a surface quality inspection report and a material composition certificate. We also support small-batch sample testing and provide comprehensive export documentation and logistics services. Please feel free to contact our sales team to request precise quotes for your specific requirements or to apply for product samples.