Haomei Aluminum's DC aluminum circle for kitchenware are deep-drawn aluminum substrates specifically developed for the global mid-to-high-end cookware manufacturing industry. They are manufactured using a direct casting process, covering the full spectrum of 1000 series pure aluminum and 3000 series aluminum-manganese alloys. With uniform grain structure, stable mechanical properties, and food-grade surface quality, DC aluminium circles are suitable for various kitchen utensils forming processes such as deep drawing, spinning, and brazing. They are the mainstream material chosen by global cookware manufacturers for mass production of high-end aluminum pots, composite-bottom cookware, and food containers.
Unlike cast-rolled (CC) aluminum circles, our DC aluminum circles, after being formed into large-size ingots through semi-continuous casting, undergo over 12 hours of high-temperature homogenization annealing to eliminate compositional segregation. Then, double-sided milling removes the surface segregation layer and subcutaneous defects. Following this, multiple passes of hot rolling, cold rolling, and target-state heat treatment are performed, ultimately resulting in precision blanking. The comprehensive organizational control ensures uniform grain size within the first-level range in the finished product, eliminating hidden defects such as inclusions and delamination. This guarantees the yield stability of cookware molding from the raw material end, making it particularly suitable for automated mass production lines with stringent consistency requirements.
Starting from the core needs of cookware manufacturing, the performance advantages of DC aluminum circles precisely address process pain points.
In terms of molding performance, the H0 fully annealed DC aluminum discs commonly used in cookware can stably maintain an elongation after fracture within the range of 28%-32%, with a higher deep-drawing limit. When producing products with large deformation volumes such as deep saucepans, milk pots, and pressure cooker inner pots, it can effectively avoid common process problems such as sidewall cracking, mouth wrinkling, and orange peel texture on the surface, keeping the mass production scrap rate below 1%.
In terms of surface quality, the dense and smooth surface produced by the milling process not only ensures that the adhesion of non-stick coatings and ceramic coatings reaches the 0-level standard, extending the service life of cookware coatings, but also reduces the risk of heavy metal leaching from microscopic pinholes, meeting the stringent requirements for food contact materials.
In terms of batch consistency, a single DC ingot can weigh several tons, with extremely low dispersion in material composition and mechanical properties within the same batch. This makes it suitable for continuous production on fully automated stamping lines, eliminating the need for frequent process parameter adjustments and significantly reducing production setup costs and quality fluctuations.
Haomei DC aluminum circles for kitchen utensils are available in thicknesses ranging from 0.4mm to 6.0mm and diameters from 120mm to 900mm. We offer mainstream grades such as 1050, 1060, 1100, and 3003, and support customization in multiple states including O-state, H12, and H14. These products meet the production needs of all categories, including single-layer thin-walled pots, thickened multi-layered pots, and commercial cookware. All products have passed international and domestic food contact safety certifications such as FDA, LFGB, and GB 4806.9, and come with double-sided lamination and ocean-going moisture-proof packaging to effectively prevent oxidation and damage during sea transport.
As a professional aluminum circles supplier, Haomei Aluminum provides full-process technical support, from grade selection to specification customization, balancing small-batch trial orders with stable large-volume delivery capabilities to meet the procurement needs of cookware companies of all sizes worldwide.