3003 aluminum circle for pressure cooker body is a commonly used aluminum-manganese alloy product with good formability, weldability and corrosion resistance, suitable for manufacturing the pot body of pressure cookers. 3003 aluminum discs are widely used in the manufacture of kitchenware such as pressure cookers, rice cooker inner pots, and non-stick pans. For example, Debo pressure cookers use 3003 aluminum alloy pot bodies, which are both lightweight and corrosion-resistant.
3003 aluminum alloy belongs to the Al-Mn alloy series, with the main components of aluminum (≥98%), manganese (0.1%-0.5%), copper (≤0.1%) and other elements. Its tensile strength is 120-160MPa, yield strength ≥85MPa, elongation ≥5%, hardness 45-55HB, with good strength and ductility, and can withstand the stress of pressure cookers under high temperature and high pressure environments.
3003 aluminum circles for pressure cookers are usually produced by hot rolling-cold rolling process. For example, through two-stage heat homogenization treatment (first stage 615±10℃, second stage 450±10℃) and control of the total cold rolling processing rate of 80-91%, the grain can be refined to 25-32μm, significantly improving the deep drawing performance and reducing the risk of cracking during deep drawing. Some manufacturers use "1+1" hot rolling units and continuous air cushion annealing furnaces to further optimize surface quality and processing toughness.
Advantages of 3003 aluminum circles for pressure cooker bodies:
- Good thermal conductivity
3003 aluminum alloy has excellent thermal conductivity, fast and uniform thermal conductivity, which helps the pressure cooker to heat up quickly and evenly, improving cooking efficiency.
- Corrosion resistance and food safety
3003 aluminum alloy itself has anti-rust properties. After hard anodizing treatment, the hardness of the oxide film formed on the surface can reach more than 400HV, and the corrosion resistance time of the neutral salt spray test exceeds 1200 hours. The oxide film can effectively isolate the aluminum substrate from food contact, comply with FDA and GB 4806.9 food-grade safety standards, and ensure safety for long-term use.
- Cost and cost performance
The cost of 3003 aluminum alloy is significantly lower than that of stainless steel (such as 443 stainless steel), and the processing energy consumption is lower. For example, the price of 3003 aluminum strip is about 21 yuan/kg, while the price of 443 stainless steel is usually 30%-50% higher. Its high thermal conductivity can reduce heating energy consumption and further reduce the cost of use, so it has become the mainstream choice in the kitchenware industry.
- Safety and certification
In addition to FDA and GB 4806.9 certification, some manufacturers' products meet the EU RoHS environmental protection standards. The anodized film passes strict neutral salt spray tests and alkali resistance tests to ensure that no harmful substances will be released during long-term use, and it meets food contact safety requirements.
Application of 3003 aluminum circles:
- Pressure cooker body: Due to its corrosion resistance and formability, 3003 aluminum alloy is very suitable for manufacturing the body of pressure cookers, and can be used safely under high temperature and high pressure environments.
- Kitchen appliances: In addition to pressure cookers, 3003 aluminum alloy is also widely used in the manufacturing of other kitchen appliances and utensils.