20mm white aluminium circle
20mm white aluminium circle is a precision‑cut, pre-finished aluminum disc designed for cookware, lighting, signage, and decorative applications requiring small, uniform, corrosion‑resistant parts. With stable mechanical strength, smooth white surface coating, excellent formability, and consistent diameter tolerance, it is ideal for stamping, deep drawing, spinning, and CNC machining in both industrial and consumer product manufacturing.
A 20mm white aluminium circle is a small, round disc made from high‑purity aluminum alloy and finished with a durable white surface (typically powder coating or baked enamel). Its compact diameter, stable thickness, and refined edge quality make it suitable for high‑volume automated processing and precision assembly work.
This product is engineered to combine the lightweight benefits of aluminum with an aesthetic white surface that eliminates additional painting steps for many end uses.
Features
- Compact 20mm diameter for fine, small‑scale components
- Bright, uniform white surface for direct decorative or functional use
- Excellent corrosion resistance in indoor and mild outdoor environments
- High formability for stamping, punching, spinning, and shallow to medium deep drawing
- Good thermal conductivity for heat‑related parts such as small reflectors and heat shields
- Consistent thickness and diameter tolerances for automated assembly and feeding systems
Typical Alloys & Tempers
20mm white aluminium circles are commonly produced from non‑heat‑treatable, food‑safe, and highly formable alloys. The exact alloy is chosen according to forming depth, strength, and surface requirements.
Common Alloy Options
| Alloy Series | Typical Alloy | Temper Options | Main Characteristics | Common Usage Focus |
|---|---|---|---|---|
| 1xxx | 1050, 1060 | O, H12, H14 | Very high purity, best formability, low strength | Deep drawing, cookware, reflectors |
| 3xxx | 3003, 3105 | O, H14, H16 | Improved strength, good corrosion resistance | Utensils, automotive trim, nameplates |
| 5xxx | 5052 | O, H32 | Higher strength, good marine resistance | Hardware, small structural components |
Typical Chemical Composition (Reference: 1050 & 3003 Alloys)
Actual chemical composition depends on the exact alloy grade and standard (EN, AA, GB, etc.). Values below are indicative ranges.
Alloy 1050
| Element | Content (wt. %) |
|---|---|
| Al | ≥ 99.50 |
| Si | ≤ 0.25 |
| Fe | ≤ 0.40 |
| Cu | ≤ 0.05 |
| Mn | ≤ 0.05 |
| Mg | ≤ 0.05 |
| Zn | ≤ 0.07 |
| Ti | ≤ 0.05 |
| Others | ≤ 0.03 each |
Alloy 3003
| Element | Content (wt. %) |
|---|---|
| Al | Balance |
| Mn | 1.0 – 1.5 |
| Cu | 0.05 – 0.20 |
| Si | ≤ 0.60 |
| Fe | ≤ 0.70 |
| Zn | ≤ 0.10 |
| Others | ≤ 0.05 each |
Core Technical Specifications
The table below outlines typical technical data for a 20mm white aluminium circle. Values can be adjusted based on specification, standard, and customer requirement.
Dimensional & Geometric Parameters
| Parameter | Typical Value / Range |
|---|---|
| Diameter | 20 mm |
| Diameter Tolerance | ±0.10 mm to ±0.20 mm |
| Thickness Range | 0.5 – 3.0 mm |
| Standard Thickness Options | 0.8 / 1.0 / 1.2 / 1.5 / 2.0 mm |
| Thickness Tolerance | ±0.05 mm (thin) / ±0.08 mm (thicker) |
| Roundness Deviation | ≤ 0.15 mm |
| Edge Type | Sheared, deburred, or fully rounded |
| Surface Finish | White powder coat or white paint |
| Surface Gloss Level | Matte, semi‑gloss, or high gloss |
Mechanical Properties (Representative Values)
Example values for common conditions (for guidance only):
| Alloy / Temper | Tensile Strength Rm (MPa) | Yield Strength Rp0.2 (MPa) | Elongation A50 (%) |
|---|---|---|---|
| 1050‑O | 60 – 95 | 15 – 30 | 30 – 40 |
| 1050‑H14 | 95 – 125 | 30 – 60 | 10 – 18 |
| 3003‑O | 75 – 120 | 25 – 40 | 25 – 35 |
| 3003‑H14 | 115 – 160 | 50 – 90 | 10 – 20 |
Physical Properties
| Property | Typical Value for Al Alloys |
|---|---|
| Density | ~2.70 g/cm³ |
| Melting Range | ~630 – 660 °C |
| Thermal Conductivity | ~200 – 230 W/m·K |
| Electrical Conductivity | ~50 – 60 % IACS |
| Coefficient of Expansion | ~23 × 10⁻⁶ /K |
| Service Temperature (coated) | Up to ~150 °C (coating‑dependent) |
Coating & Surface Quality
The “white” in 20mm white aluminium circle usually refers to a pre‑applied white coating. This can be customized to suit appearance, durability, and processing method.
Typical Coating Characteristics
| Attribute | Options / Values |
|---|---|
| Coating Type | Polyester powder, epoxy powder, or baked enamel |
| Color Tone | RAL white shades (e.g., RAL 9003, RAL 9016) |
| Coating Thickness | 15 – 30 µm typical |
| Adhesion | Pass cross‑cut or bend tests as per standard |
| Impact Resistance | Compliant with common powder‑coat specs |
| Corrosion Resistance | Salt spray performance per coating grade |
Surface Appearance
- Smooth, clean, scratch‑minimized surface
- Uniform color without yellowing or patchiness
- Optional protective PE film on the visible side to avoid damage during stamping, shipping, and assembly
Processing & Formability
20mm white aluminium circles are designed for efficient downstream processing.
Suitable Manufacturing Processes
- Stamping and punching for small parts, tags, and washers
- Deep drawing (especially for 1050‑O or 3003‑O) for small caps or shallow cups
- Metal spinning for miniature reflectors or housings
- CNC machining for precision recesses, holes, or alignment features
- Adhesive bonding or riveting into assemblies
Forming Notes
| Aspect | Recommendation |
|---|---|
| Minimum Bend Radius | At least 1× thickness for coated surface side |
| Lubrication | Light, clean forming oils to protect coating |
| Coating Side Forming | Prefer coating on outer radius during bending |
| Burr Management | Request deburred or rounded edge for safe handling |
Typical Applications
Due to its compact size and visually clean finish, the 20mm white aluminium circle is widely used in both technical and decorative products.
Household & Cookware
| Application Area | Example Use |
|---|---|
| Small cookware parts | Decorative caps, small bases, knob plates |
| Kitchen utensils | Emblem discs, brand badges, functional inserts |
| Appliance trim | Control knob backplates, small decorative covers |
When food contact is required, high‑purity alloys such as 1050 or 1060 with appropriate coating systems are preferred.
Lighting & Electrical
| Sector | Example Use |
|---|---|
| LED lighting | Small reflectors, mounting discs, decorative bezels |
| Switchgear | Marking plates, indicator backing, label carriers |
| Electronics | Grounding tabs (uncoated side), insulated faceplates |
The white surface contributes to good light reflectivity and neutral appearance in luminaires and fittings.
Signage, Branding & Decoration
| Category | Example Use |
|---|---|
| Promotional | Printed tokens, badges, medallions, brand tags |
| Sign systems | Icon plates, directional symbols, small logos |
| Crafts & DIY | Jewelry bases, art pieces, model components |
The pre‑coated white face accepts screen printing, UV printing, stickers, or laser marking (depending on coating).
Industrial & Technical Components
| Area | Example Use |
|---|---|
| Machinery | Blank tags, identification plates, cover caps |
| Hardware fittings | Decorative washers, escutcheons, trim pieces |
| Automotive / transport | Interior symbol plates, button inlays |
Packaging & Supply Conditions
To maintain surface quality and dimensional consistency, 20mm white aluminium circles are carefully packed.
| Parameter | Typical Option |
|---|---|
| Supply Form | Bulk cartons, poly‑bags, or reel‑fed (for very thin discs) |
| Protective Layer | Interleaving paper or PE film between layers |
| Inner Packaging | Heat‑sealed plastic or shrink‑wrap bundles |
| Outer Packaging | Export‑grade cartons on wooden pallet |
| Quantity per Carton | Based on diameter × thickness combination |
Customization Options
Manufacturers typically support tailored specifications to match your production line:
| Customizable Item | Examples |
|---|---|
| Alloy & Temper | 1050‑O, 3003‑H14, 5052‑H32, and others |
| Thickness | Fine increments within 0.5 – 3.0 mm range |
| Coating Color | RAL whites or other colors, single or double side |
| Surface Gloss | Matte, satin, or high gloss finishes |
| Edge Treatment | Deburred, chamfered, or rounded edges |
| Packaging | Custom counts, labeling, barcode, OEM branding |
Quick Selection Guide
Use the following reference table when choosing a 20mm white aluminium circle configuration for your project:
| Priority Need | Recommended Choice |
|---|---|
| Deep drawing, maximum formability | Alloy 1050‑O with single‑side white coat |
| Balanced strength and formability | Alloy 3003‑O or 3003‑H14 |
| Higher strength and durability | Alloy 5052‑H32 |
| Best decorative appearance | High‑gloss polyester powder coating |
| Scratch protection in transit | Coating plus removable PE film |
By combining tailored alloy selection, controlled dimensions, and a stable white coating system, the 20mm white aluminium circle delivers a compact, ready‑to‑use blank that simplifies fabrication, enhances product appearance, and supports high‑efficiency mass production across multiple industries.
