Stick aluminium circle disc for cookwares
Aluminum circles are essential components in modern cookware production, offering superior heat distributing qualities and manufacturing flexibility. Among them, the stick aluminium circle disc for cookwares stands out as a specialized material designed to meet high-performance standards in cookware manufacturing. Its unique properties and specific technical parameters make it an ideal choice for producing durable, safe, and efficient cooking utensils.
A stick aluminium circle disc is a thin, flat, circular metal plate precisely manufactured from high-quality aluminum alloy. In cookware, it is mainly used as cooking pan bodies, lids, and pressure cooker lids. The discs, known for their strength, malleability, and corrosion resistance, facilitate efficient heat transfer while maintaining optimal cooking safety.
Such discs are fabricated through processes such as hot rolling, cold rolling, and hemming, strengthening their mechanical properties suitable to high-temperature environments.
Core Functions in Cookware
- Efficient Heat Conduction: Aluminum's excellent thermal conductivity ensures quick and consistent heating across the cooking surface.
- Light Weight with Durability: The aluminum alloy reduces the overall weight of the cookware but retains impact resistance.
- Corrosion and Oxidation Resistance: Surface treatments provide long-lasting resistance against wear from acidic foods and moisture.
- Formability and Precision: Ability to be drawn, hammered, or bent helps create seamless cookware shapes with uniform thickness.
- Compatibility with Non-stick Coatings: Prepare an ideal substrate for PTFE and ceramic coatings, enhancing kitchen usability.
Applications
Stick aluminium circle discs are fundamental in the production of:
- Skillets and frying pans
- Saucepan and stockpot lids
- Pressure cooker bodies and covers
- Baking trays and roasting pans
- Stackable layers and inserts in cookware assemblies
Their versatility also makes them suitable in small appliance components requiring high-temperature endurance.
Technical Specifications & Implementation Standards
the specifications and standards ensures the stick aluminium circle discs meet or exceed industrial and safety requirements. Typical standards adhered to in production include ASTM B209, EN 485, JIS H4000, and GB/T 3880.
| Parameter | Specification |
|---|---|
| Material Alloy | Aluminum Alloy 8011, 8079, 1050, 1060 |
| Thickness Range | 0.15 mm – 1.5 mm |
| Diameter Range | 100 mm – 2000 mm |
| Surface Finish | Mill finish, Modified finish (e.g., fluxed, cleaned) |
| Temper | H14, H16, H18, O (annealed), H24 |
| Tolerance Thickness | ±0.02 mm |
| Flatness | Controlled per MIL-STD-975 |
| Edge Type | Slit, Hemmed, as required |
| Internal Defects Control | Verified by ultrasonic testing or eddy current test |
Alloy Tempering Conditions and Mechanical Properties
The temper condition of the aluminium circle greatly influences its mechanical behavior-for example, hardness, tensile, and elongation-which will affect both formability and service performance.
| Alloy | Temper | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|---|---|
| 8011 | H14 | 170 – 200 | 120 – 150 | 5 – 8 | 40 – 50 |
| 8079 | O | 70 – 110 | 35 – 70 | 35 – 40 | 20 – 35 |
| 1050 | H16 | 105 – 145 | 80 – 110 | ≈ 10 | 40 – 50 |
| 1060 | H18 | 125 – 145 | 105 – 125 | 9 – 10 | 45 – 55 |
Tensile strength and hardness vary slightly based on production habits and alloy purity.
Chemical Composition
Control of chemical elements is crucial in meeting heat resistance and corrosion standards for cookware. The common alloy compositions for stick aluminium circles focus on ensuring non-toxicity and excellent thermal properties.
| Element | 8011 (%) | 8079 (%) | 1050 (%) | 1060 (%) |
|---|---|---|---|---|
| Aluminum (Al) | 95.0 – 98.5 | 96.0 min | 99.5 min | 99.6 min |
| Silicon (Si) | 0.20 – 0.60 | 0.40 max | 0.25 max | 0.25 max |
| Iron (Fe) | 0.60 – 1.20 | 0.80 max | 0.40 max | 0.35 max |
| Copper (Cu) | 0.15 max | 0.04 max | 0.05 max | 0.05 max |
| Manganese (Mn) | 0.30 – 0.80 | 0.40 max | 0.05 max | 0.03 max |
| Magnesium (Mg) | 0.10 max | 0.06 max | 0.03 max | 0.03 max |
| Zinc (Zn) | 0.10 max | 0.06 max | 0.03 max | 0.03 max |
| Titanium (Ti) | - | 0.10 max | - | - |
| Others (each) | 0.05 max | 0.05 max | 0.05 max | 0.05 max |
The above composition reflects international grades widely accepted for food-safe cookware.
Advantages over Other Metals
Compared with stainless steel or cast iron, stick aluminium circles bring notable advantages to cookware production:
- Catalyze fast energy saving during cooking
- Avoid hot spots and uneven temperature distribution
- Resistant to rust and other corrosion while maintaining bright appearance
- Facilitate lightweight cookware designs with ergonomic ease
These properties contribute toward a high consumer satisfaction rate and sustainability of use.
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