What Is 3004 Prepainted Aluminum Sheet?
3004 prepainted aluminum sheet is made from 3004 Al-Mn-Mg alloy with a factory-applied organic coating. The alloy offers higher strength than 3003 while retaining good formability, corrosion resistance and fabrication performance.
The exposed side is typically finished with a PE or PVDF color coating for weather protection and appearance. For truck and trailer body applications, the reverse side can be supplied with a clear back coating (back varnish) to provide additional surface protection during fabrication and service. Coating systems can be selected according to the required weather resistance, color retention and operating environment.
3004 prepainted aluminum sheet is commonly used for truck and trailer body panels, refrigerated vehicle skins, roofing, wall cladding, ceilings, appliance panels and other formed metal products.
Specifications, Coating & Order Options
Specifications
3004 prepainted aluminum sheet is available in different tempers, thicknesses, widths, coating systems, colors and surface finishes to suit forming, fabrication and architectural applications. Custom dimensions, coating requirements and color matching can be supplied according to project specifications.
| Parameter | Specification |
| Alloy | 3004 |
| Temper | O / H12 / H14 / H16 / H18 / H22 / H24 |
| Thickness | 0.2–6.0 mm |
| Width | 20–2000 mm |
| Length | Cut to required size |
| Top Coating | PE / PVDF |
| Coating Structure | Single-side color coated |
| Back Side | Clear back coating / Back varnish available |
| Color | RAL colors / Custom color matching |
| Surface Finish | Smooth / Gloss / Matt |
| Protective Film | Available on request |
| Supply Form | Sheet / Cut-to-size sheet |
| Standard | ASTM B209 / EN AW-3004 / GB/T 3880 |
| Typical Applications | Truck bodies, trailer siding, refrigerated |
Coating & Surface
3004 prepainted aluminum sheet is available with different coating systems, colors, gloss levels and surface finishes. Coating and surface specifications can be matched to forming requirements, appearance standards and indoor or outdoor service conditions.
| Option | Available Selection |
|---|---|
| Coating system | PE / PVDF |
| Color | RAL / Pantone / Approved sample matching |
| Surface finish | Matte finish, High-gloss finish, Wood grain finish, Embossed finish (Custom) |
| Protection | Protective film or interleaving material where required |
| Element | Typical Content |
|---|---|
| Si | ≤ 0.30% |
| Fe | ≤ 0.70% |
| Cu | ≤ 0.25% |
| Mn | 1.0–1.5% |
| Mg | 0.8–1.3% |
| Zn | ≤ 0.25% |
| Al | Balance |
Coating & Surface Finish Options
Custom coating and surface options are available for project-specific requirements. RAL/Pantone codes, drawings or approved samples can be provided for production reference.
PE Coating
Polyester coating provides good flexibility, color consistency and corrosion resistance for general indoor and outdoor applications.
PVDF Coating
PVDF coating offers higher UV, weather and fade resistance, suitable for exterior roofing, cladding and long-term outdoor use.
Matte Finish
Low-gloss surface with reduced reflection, providing a clean and uniform appearance.
High-Gloss Finish
Smooth, bright surface with higher gloss for decorative and visible components.
Wood Grain Finish
Decorative wood-effect coating available in different patterns and color tones.
Embossed Finish
Textured surfaces such as stucco patterns can be supplied for decorative and functional applications.
PE or PVDF Coating?
PE and PVDF coatings differ mainly in weather resistance, color retention, service life and cost, making each suitable for different application and exposure conditions.
Polyester (PE)
A practical choice for general truck bodies, trailer siding, roofing and industrial panels. PE offers consistent appearance, forming compatibility and cost control for volume production.
PVDF
Recommended where exterior panels need higher UV resistance, weatherability and long-term color retention, including premium vehicle panels and architectural cladding.
Contact Us
Not Sure Which Coating to Choose?
Tell us your application, service environment and expected outdoor life. Our team can recommend a suitable PE or PVDF coating system, including coating thickness, color and gloss level.
Advantages
Good Formability
Suitable for bending, profiling and roll forming when the temper, thickness and coating system are matched to the process.
Higher Panel Strength
Provides greater rigidity than 3003 while maintaining practical forming performance for large sheet-metal components.
Coating-Ready Substrate
Supports PE and PVDF finishes for vehicle, architectural and industrial exterior panels.
Lightweight Construction
Reduces component weight compared with conventional steel sheet and supports corrosion-resistant body structures.
Applications
3004 prepainted aluminum sheet is used where formability, corrosion resistance and a finished decorative surface are required. Depending on the coating system and product specification, it can be supplied for building, roofing, interior decoration, appliance, transportation and general industrial applications.
Commercial Vehicles
- Truck body side panels
- Trailer and van siding
- Refrigerated truck skins
- Insulated vehicle bodies
Building Panels
- Roofing and wall cladding
- Ceilings and canopies
- Profiled exterior panels
- Decorative sheet-metal components
Industrial Uses
- Equipment housings
- Cabinets and covers
- Fabricated enclosures
- Prefinished OEM panels
3004 vs. 5052 for Truck & Trailer Bodies
3004 and 5052 aluminum are both used for truck and trailer body panels, but they suit different requirements. 3004 offers good formability, moderate strength and cost efficiency for roofing, side skins and formed panels, while 5052 provides higher strength, better corrosion resistance and durability for side panels, doors and components exposed to heavier loads or demanding service conditions.
| Factor | 3004 | 5052 H32 |
|---|---|---|
| Alloy system | Al-Mn-Mg | Al-Mg |
| Strength | Moderate | Higher |
| Formability | Very good | Good |
| Panel rigidity | Good | Higher |
| Typical selection | Side panels and general body skin | Higher-strength panels and large roof sections |
| Cost position | More economical | Higher |
Choose 3004 where formability, prepainted appearance and cost control are priorities. Consider 5052 H32 when the design requires higher strength, greater dent resistance or more demanding structural performance.
Custom Supply for Vehicle & Panel Manufacturers
Shandong Union supplies custom prepainted aluminum sheet for vehicle body and panel manufacturers, with specifications matched to forming processes, panel structures and surface requirements.
- Confirm the substrate: Select the required alloy, temper and thickness based on forming method and panel rigidity.
- Define coating requirements: Specify PE or PVDF coating, color reference, gloss level and surface finish.
- Set sheet dimensions: Confirm width, length, dimensional tolerance and protective film requirements.
- Approve the production reference: Confirm the color sample and technical specification before batch production.
Send your drawing, material specification or current sample to the Shandong Union team for material selection, coating matching and quotation.
Contact Us
Need 3004 Prepainted Sheet for Your Project?
Send your required temper, thickness, sheet size, coating system, color reference and application. Our team will review the specification and prepare a project-based quotation.
Response within one business day
3004 Prepainted Aluminum Sheet Manufacturer & Factory Capability
Shandong Union manufactures and supplies 3004 prepainted aluminum sheet for building panels, vehicle bodies, appliances and industrial fabrication. Our production capability covers aluminum rolling, surface pretreatment, coil coating, slitting and cut-to-size processing, supporting both standard orders and project-specific requirements. PE and PVDF coating systems, custom colors, gloss levels, thicknesses and dimensions can be matched to customer drawings and end-use conditions. From substrate selection and coating specification to inspection and export packing, our team provides a complete supply solution for volume production and project procurement.
Manufacturing Support from Specification to Shipment
- Made-to-order production: alloy, temper, thickness, width and length are coordinated around the customer drawing and forming method.
- Coating and color control: PE or PVDF, gloss, surface finish and RAL, Pantone or approved-sample matching are confirmed before production.
- Fabrication-ready supply: cut-to-length sheets and protective-film options help reduce preparation work at the customer’s plant.
- Batch consistency: order requirements are recorded for repeat supply, with checks covering dimensions, appearance, color and specified coating characteristics.
- Export coordination: protective packing, package identification and shipment planning are arranged for international delivery.
How Our Factory Handles a Custom Order？
Review Requirements: We review the application, forming process, drawings and service environment.
Confirm Specifications: The 3004 temper, sheet dimensions, coating system, color, gloss and surface protection are confirmed before production.
Approve Production Reference: We establish the technical specification and approved color reference for batch production.
Quality Inspection: Substrate condition, dimensions, coating quality and finished surface are checked against the agreed order requirements.
Packing & Release: We pack and mark the finished sheets with clear order and material identification for shipment.
For repeat projects, the confirmed material specification and color reference can be retained to improve consistency between production batches. Customers can send us a drawing, color code, technical specification or physical sample for review before quotation.
Quality Control
Shandong Union controls both the aluminum substrate and finished coating. Production checks cover substrate thickness and flatness, coating thickness, color difference, gloss, adhesion, surface finish and dimensional tolerance. Finished sheets are inspected for scratches, coating defects and other surface issues before packing, with batch records maintained for traceability.
- Alloy and temper verification
- Thickness, width and length inspection
- Surface-quality inspection
- Coating-thickness verification when specified
- Color consistency against approved reference
- Coating adhesion testing when required
Packaging & Delivery
Finished sheets are protected according to their size, coating condition and shipping method. Options include protective film or interleaving, secured stacks, reinforced seaworthy wooden pallets and clear package marking with alloy, temper, dimensions, color and order information.
FAQ
What is 3004 prepainted aluminum sheet?
It is 3004 Al-Mn-Mg aluminum sheet with a factory-applied organic coating. The material combines formability, corrosion resistance and a finished color surface for vehicle bodies, building panels and industrial enclosures.
Is 3004 aluminum suitable for truck body panels?
Yes. Its balance of strength, formability, low weight and corrosion resistance makes it suitable for prepainted side skins and formed commercial-vehicle panels.
What is the difference between 3004 and 5052 aluminum?
3004 offers very good forming performance and a practical cost position for general prepainted panels. 5052 H32 provides higher strength and dent resistance for more demanding body structures. Final selection should consider thickness, forming method and service load.
What is the difference between PE and PVDF coating?
PE is a cost-effective option for general-purpose color-coated panels. PVDF is normally selected when higher UV resistance, weatherability and long-term exterior color retention are required.
Can 3004 prepainted sheet be bent and roll formed?
Yes. Suitable temper and coating combinations can be bent, profiled and roll formed. Bend radius, thickness, temper and coating system should be confirmed before volume production.
Can colors and sheet dimensions be customized?
Yes. RAL, Pantone or approved sample matching can be specified together with custom thickness, width, length, gloss and protective-film requirements, subject to production confirmation.