Coil Coated Aluminum Sheet Wholesale
Coil coated aluminum sheet is a pre-finished aluminum product produced by applying liquid paint, primer, or functional coating onto flat aluminum coil before slitting, cutting, profiling, or panel forming. For wholesale buyers, the value is simple: stable color, consistent surface quality, fast downstream processing, and reliable batch supply.
At Haomei Aluminum CO., LTD., Inc., coil coated aluminum sheet is supplied for construction cladding, roofing, ACP production, ceilings, signage, appliances, transportation interiors, and industrial enclosures. The coating system can be selected according to outdoor exposure, bending demand, gloss target, color design, and project budget.
What Makes Coil Coated Aluminum Sheet Practical
Unlike post-painted sheet, coil coating is completed on a continuous production line. The aluminum substrate is cleaned, chemically treated, primed, painted, baked, cooled, and recoiled under controlled tension and temperature. This creates an even film with strong adhesion and excellent repeatability.
The finished sheet can be delivered as coil, flat sheet, strip, or custom cut-to-size material. It works well with roll forming, stamping, bending, punching, laminating, and panel bonding. For distributors and fabricators, this reduces paint shop labor, improves delivery speed, and keeps color difference under tighter control.
Wholesale programs usually focus on three coating families: PE for economical indoor and general use, HDP or SMP for improved weathering, and PVDF for premium exterior durability. For architectural projects exposed to strong sunlight, salt air, or pollution, PVDF Coated Aluminum Sheet is often selected because of its long-term color retention and chemical resistance.
Typical Aluminum Alloys and Chemical Composition
Coil coated aluminum sheet is commonly based on 1xxx, 3xxx, and 5xxx alloys. The selection depends on strength, corrosion resistance, forming behavior, and end use.
| Alloy | Si | Fe | Cu | Mn | Mg | Zn | Al | Common Use |
|---|---|---|---|---|---|---|---|---|
| 1050 | ≤0.25 | ≤0.40 | ≤0.05 | ≤0.05 | ≤0.05 | ≤0.05 | ≥99.50 | Signage, ceiling, insulation jacket |
| 1060 | ≤0.25 | ≤0.35 | ≤0.05 | ≤0.03 | ≤0.03 | ≤0.05 | ≥99.60 | Decorative sheet, lamp housing, trim |
| 3003 | ≤0.60 | ≤0.70 | 0.05-0.20 | 1.00-1.50 | - | ≤0.10 | Balance | Roofing, wall cladding, general panels |
| 3004 | ≤0.30 | ≤0.70 | ≤0.25 | 1.00-1.50 | 0.80-1.30 | ≤0.25 | Balance | Roofing sheet, gutter, facade panel |
| 3105 | ≤0.60 | ≤0.70 | ≤0.30 | 0.30-0.80 | 0.20-0.80 | ≤0.40 | Balance | Painted building sheet, roll formed parts |
| 5052 | ≤0.25 | ≤0.40 | ≤0.10 | ≤0.10 | 2.20-2.80 | ≤0.10 | Balance | Marine parts, transport panels, heavy-duty covers |
Technical Specifications for Wholesale Orders
Haomei Aluminum CO., LTD., Inc. can supply coil coated aluminum sheet in standard and project-specific dimensions. Specification control is especially important when the material will be used for continuous roll forming or large-area facade installation.
| Parameter | Common Range | Notes |
|---|---|---|
| Thickness | 0.20-3.00 mm | Tolerance can be adjusted by contract standard |
| Width | 600-1600 mm | Wider options available for selected alloys |
| Coil ID | 405 mm, 505 mm, 508 mm | Matched to decoiler equipment |
| Coil weight | 1-5 tons | Based on thickness, width, and logistics limits |
| Paint system | PE, HDP, SMP, PVDF, FEVE | Selected by exposure and cost target |
| Top coating thickness | 15-35 microns | PVDF commonly 25 microns or higher |
| Back coating thickness | 5-15 microns | Service coating or protective back coat |
| Gloss | 10-90 GU | Matte, satin, semi-gloss, high gloss |
| Color standard | RAL, Pantone, custom sample | Color matching by lab approval |
| Surface finish | Smooth, embossed, wood grain, stone pattern | Protective film optional |
Mechanical Properties
The aluminum temper controls formability and rigidity. Softer tempers are preferred for deep bending, while harder tempers help maintain panel flatness and dent resistance.
| Alloy and Temper | Tensile Strength | Yield Strength | Elongation | Fabrication Behavior |
|---|---|---|---|---|
| 1050 H14 | 95-125 MPa | 75-105 MPa | ≥2% | Easy bending and light forming |
| 3003 H14 | 140-180 MPa | 115-155 MPa | ≥3% | Balanced strength and workability |
| 3004 H24 | 180-240 MPa | 145-205 MPa | ≥4% | Good for roofing and roll forming |
| 3105 H24 | 150-200 MPa | 120-170 MPa | ≥4% | Stable for building panels |
| 5052 H32 | 210-260 MPa | 160-215 MPa | ≥6% | Higher strength and corrosion resistance |
Values are typical reference ranges. Final figures should be confirmed by mill test certificate according to EN, ASTM, GB, or customer specification.
Coating Performance Data
The coating layer is more than color. It protects the metal, improves weather resistance, and supports long service life in demanding locations.
| Test Item | PE Coating | PVDF Coating | Test Meaning |
|---|---|---|---|
| Pencil hardness | ≥HB | ≥F | Scratch resistance during handling |
| T-bend | ≤3T | ≤2T | Flexibility after bending |
| Impact resistance | ≥50 kg·cm | ≥50 kg·cm | Coating toughness |
| Salt spray resistance | 500-1000 h | 1000-2000 h | Corrosion resistance in humid air |
| Color difference | ΔE ≤1.5 typical | ΔE ≤1.0 typical | Batch color consistency |
| Outdoor service life | 5-10 years | 15-25 years | Depends on climate and maintenance |
| Adhesion | Grade 0-1 | Grade 0-1 | Bonding strength between coating and substrate |
For budget-sensitive indoor panels, PE Color Coated Aluminum Sheet provides attractive color and good processing performance. For landmark facades, coastal roofing, airports, stations, and commercial towers, PVDF coating is usually the safer long-term option.
Application Fields
Coil coated aluminum sheet is widely used because it combines low weight, corrosion resistance, and decorative flexibility. In roofing systems, it can be roll formed into standing seam panels, corrugated sheets, gutters, flashing, and soffit parts. Aluminum reduces structural load while resisting rust better than uncoated steel in many environments.
In facade and curtain wall systems, painted aluminum sheet provides flatness, color depth, and clean edges. It is suitable for solid aluminum panels, honeycomb panels, and aluminum composite panels. ACP manufacturers prefer stable coil quality because coating defects can appear clearly after lamination.
Signage producers use white, black, metallic, and custom colors for shop signs, traffic boards, petrol station decoration, and advertising panels. Appliance and equipment manufacturers use the material for refrigerator side panels, cabinet shells, lighting fixtures, display racks, and clean interior linings.
Benefits for Wholesale Buyers
Wholesale purchasing is not only about price per ton. It is about stable supply, repeatable color, reduced scrap, and smooth processing in the buyer's workshop. A reliable coil coated aluminum sheet program helps distributors keep popular colors in stock and respond quickly to fabrication orders.
| Buyer Need | Product Benefit |
|---|---|
| Fast fabrication | Material is already painted and ready for cutting or forming |
| Consistent appearance | Continuous coating line improves color and gloss uniformity |
| Lower maintenance | Coating resists UV, moisture, stains, and mild chemicals |
| Reduced weight | Aluminum is easier to transport and install than many heavier metals |
| Design freedom | Solid color, metallic, matte, high gloss, embossed, and wood grain finishes |
| Supply planning | Coil, sheet, and strip formats support different production lines |
How to Select the Right Product
For indoor decoration, ceiling panels, and display applications, PE coating on 1050, 1060, or 3003 aluminum usually offers an efficient cost-performance balance. For roofing, gutter, and exterior wall panels, 3003, 3004, or 3105 with HDP or PVDF coating gives better durability. For industrial covers, transport panels, or marine-adjacent conditions, 5052 alloy can add strength and corrosion resistance.
Color selection should be tested under real lighting conditions. Matte finishes hide small surface waves better, while high-gloss finishes create a bright appearance but demand stricter handling. Protective film is recommended when panels will be punched, routed, or transported over long distances.
Wholesale Support From Haomei Aluminum CO., LTD., Inc.
Haomei Aluminum CO., LTD., Inc. supplies coil coated aluminum sheet wholesale with flexible alloy, temper, coating, color, width, and packing choices. Production can be arranged for standard RAL colors or customer samples, with inspection for thickness, gloss, color difference, adhesion, bending, and surface quality before shipment.
For customers building stock programs or serving project orders, coil coated aluminum sheet offers a practical combination of appearance, processability, and long-term protection. With the right alloy and coating system, it becomes a dependable material for roofing, facade, ACP, signage, interior decoration, and industrial manufacturing.
