High-quality aluminum circle A3004 H24, 0.7 mm thickness with PVDF coating, designed for deep drawing, spinning, and long-lasting architectural and cookware applications. Excellent corrosion resistance, stable formability, smooth surface, and high color durability make it ideal for premium stamped and coated aluminum products.
The aluminum circle A3004 H24 0.7 mm thickness with PVDF coating combines a work-hardened Al-Mn alloy core with a high-performance fluorocarbon surface. This pairing delivers:
- Reliable forming performance for spinning, drawing, and stamping
- Enhanced outdoor durability and UV resistance from the PVDF coating
- Stable thickness and dimensional control for precision cutting and machining
It is widely used for shallow to medium-depth cookware, decorative plates, signage, and architectural components where surface stability and appearance are critical.
Features and Advantages
- Alloy A3004 (Al–Mn–Mg) for improved strength over pure aluminum while maintaining good ductility
- Temper H24 offers a balanced state of partial hardening and partial annealing for consistent formability
- 0.7 mm thickness ideal for lightweight, high-yield stamping and spinning operations
- PVDF (polyvinylidene fluoride) coating provides superior weather, chemical, and color resistance
- Good weldability and workability for downstream fabrication
- Uniform surface and color suitable for visible exterior or consumer-facing parts
Chemical Composition of Aluminum Circle A3004
Typical chemical composition for alloy A3004 (reference values):
| Element | Content (%) | Function / Effect |
|---|---|---|
| Si | 0.30 max | Improves castability, minor effect on strength |
| Fe | 0.70 max | Solid solution strengthener, controlled for ductility |
| Cu | 0.25 max | Slight strength increase, kept low for corrosion |
| Mn | 1.0–1.5 | Primary hardening element, improves strength |
| Mg | 0.8–1.3 | Increases strength and work-hardening capability |
| Zn | 0.25 max | Limited for better corrosion performance |
| Cr | 0.05 max | Grain refinement, stability of structure |
| Ti | 0.15 max | Grain refinement, improves processability |
| Others (each) | 0.05 max | Trace elements only |
| Others (total) | 0.15 max | Aggregate of all trace elements |
| Al | Balance | High aluminum content for light weight and thermal response |
Values may vary slightly within standard limits depending on melt practice and customer specification.
Mechanical Properties (Typical, A3004 H24, 0.7 mm)
| Property | Typical Value | Notes |
|---|---|---|
| Tensile Strength Rm | 180–230 MPa | Adequate strength for cookware and light structural use |
| Yield Strength Rp0.2 | 120–160 MPa | Ensures resistance to permanent deformation |
| Elongation A50 | 6–12 % | Supports spinning and shallow drawing |
| Brinell Hardness (HBW) | 50–65 | Relatively soft for forming but stronger than 1xxx series |
| Density | ~2.73 g/cm³ | Slightly higher than pure Al due to alloying elements |
| Modulus of Elasticity | ~70 GPa | Typical for wrought aluminum alloys |
All values are indicative for H24 temper in the specified thickness range; actual test data can be provided per batch.
PVDF Coating Characteristics
The PVDF coating is a high-performance fluorocarbon system, typically based on 70% Kynar or equivalent resin, applied and cured on the aluminum surface.
| Item | Typical Specification |
|---|---|
| Coating Type | PVDF (polyvinylidene fluoride) fluorocarbon |
| Total Coating Thickness | 20–30 μm (single or dual-layer system) |
| Gloss Level | Matt, silky, or high gloss (20–80 GU @ 60°) |
| Color Range | RAL, Pantone, custom corporate colors |
| UV Resistance | Excellent; color retention over 15–20 years (outdoor) |
| Chemical Resistance | High resistance to acids, alkalis, and solvents |
| Stain Resistance | Very good, easy to clean surface |
| Adhesion to Substrate | Cross-cut test: Class 0–1 (excellent adhesion) |
| Temperature Resistance | Stable from -40 °C to +120 °C (short peaks higher) |
The PVDF surface provides long-term appearance retention and reduces maintenance, especially in architectural or exposed applications.
Dimensional Specifications
Standard thickness: 0.7 mm is optimized for a balance of weight, cost, and formability. Other related dimensions:
| Parameter | Typical Range / Option |
|---|---|
| Thickness | 0.7 mm nominal (tolerance per EN/ASTM) |
| Diameter Range | 80–1200 mm (custom diameters on request) |
| Thickness Tolerance | ±0.03–0.05 mm (depending on diameter) |
| Diameter Tolerance | ±0.5–1.0 mm |
| Flatness | ≤3–5 mm per meter (depending on size) |
| Edge Type | Mill edge, deburred, or fully rounded |
| Surface Finish (before coat) | Mill finish or lightly brushed |
| Protective Film | Optional PE film on front side |
Precise tolerances are agreed according to project needs and applicable standards (EN 485, ASTM B209, or customer spec).
Temper H24 – Forming and Processing Behavior
H24 means the material is half-hard, strain hardened and partially annealed. Its behavior in processing is as follows:
| Process | Suitability / Notes |
|---|---|
| Spinning | Very suitable for shallow and medium-depth spinning |
| Drawing | Suitable for low-to-medium draw ratio |
| Bending | Good bendability, recommended larger radii on coated side |
| Punching / Blanking | Clean cuts achievable with sharp tools and proper clearance |
| Deep Drawing | Possible with controlled tooling and lubrication |
| Welding (TIG/MIG) | Possible, but coating must be removed in weld area |
| Adhesive Bonding | Excellent on cleaned PVDF surface with suitable primers |
H24 provides higher yield than O-temper while still supporting efficient forming in high-speed production lines.
Applications
The combination of A3004 alloy, H24 temper, 0.7 mm thickness, and PVDF coating opens a wide range of end uses:
| Application Area | Example Uses | Benefits of This Product |
|---|---|---|
| Cookware & Kitchenware | Lids, shallow pans, pie plates, serving trays | Good formability, uniform thickness, easy cleaning |
| Household Appliances | Decorative front panels, interior reflectors | Stable color, scratch and stain resistance |
| Lighting & Reflectors | Lamp shades, reflector bowls (after polishing/coating) | Light weight, good shaping behavior |
| Architectural Components | Soffit discs, decorative ceiling elements, façade accents | Long-life color, UV and corrosion resistance |
| Signage & Display | Round sign faces, logo discs, retail display elements | Smooth coated surface, printing compatibility |
| Industrial & OEM Parts | Filter caps, covers, housings, control knobs | Balanced strength and machinability |
Where food contact is required, the PVDF layer and underlying alloy can be specified to meet regulatory requirements; application-specific compliance documentation can be provided.
Surface Quality and Tolerances
To ensure reliable downstream processing, typical surface and dimensional quality guidelines are applied:
| Aspect | Requirement / Description |
|---|---|
| Surface Defects | No visible rolling marks, oil stains, dents |
| Color Uniformity | ΔE within agreed limit across batch |
| Coating Defects | No pinholes, fish eyes, or chalking |
| Edge Condition | No cracks or severe burr; optional chamfering |
| Packaging | Anti-abrasion interleaves, moisture-resistant wrapping, palletized or wooden case |
These controls help minimize scrap during stamping, deep drawing, or spinning operations.
Advantages of 0.7 mm Thickness
The 0.7 mm gauge is widely chosen for both economic and functional reasons:
| Advantage Category | Explanation |
|---|---|
| Material Efficiency | Reduced material consumption compared to thicker gauges |
| Formability | Easier spinning and drawing with lower forming forces |
| Weight Reduction | Lightweight parts, beneficial for transport and handling |
| Thermal Response | Faster heating and cooling in cookware applications |
| Production Speed | Compatible with high-speed press lines |
For parts that require more rigidity, design options like adding ribs, bends, or multi-layer construction can be used without changing the base gauge.
Customization Options
Depending on project requirements, the following customizations are commonly available:
| Category | Options |
|---|---|
| Diameter | Tailored to customer drawing or tooling size |
| Coating System | Single-side PVDF, double-side PVDF, or mixed top/bottom |
| Color & Gloss | Full RAL range, metallic colors, textures, special gloss levels |
| Protective Film | Printing direction arrows, logo film, easy-peel or standard |
| Packaging | Export seaworthy packing, custom labels, barcodes |
| Standards | Conformance to EN, ASTM, GBT, or specific OEM specs |
This allows OEMs and brand owners to align product performance and visual design with their final application.
