Shanghai Gokai Industry Co,.Ltd.
Call Us: +86-18918606548
Call Us: +86-18918606548
- Product Name
- Product Keyword
- Product Model
- Product Summary
- Product Description
- Multi Field Search
Views: 233 Author: Gokai Publish Time: 2026-10-05 Origin: Site
Content Menu
● What Is Aluminum Composite Material (ACM)?
● What Is Steel Composite Material (SCM)?
● ACM vs. SCM: Key Differences at a Glance
● Why ACM Is Often the First Choice for Signage and Fabrication
>> Lightweight Panels Reduce Handling and Installation Burden
>> ACM Supports Multiple Fabrication Methods
>> Aluminum Skins Offer Useful Corrosion Resistance
● Why SCM Is Better for Magnetic and High-Stiffness Applications
>> Magnetic Function Creates Reusable Display Systems
>> SCM Can Offer Greater Rigidity
● Core Type Matters More Than Many Buyers Expect
>> Do Not Treat Fire Rating as a Panel-Only Claim
● Allow for Thermal Expansion and Contraction
>> Installation Practices That Help Prevent Panel Distortion
● How to Choose the Right Composite Panel in Five Steps
>> 2. Identify the Required Function
>> 3. Confirm Environmental Conditions
>> 4. Match the Panel to the Fabrication Method
>> 5. Build a Clear OEM Specification
● OEM Aluminum Composite Panel Solutions from Gokai
● Request Your ACM or SCM Panel Quote
>> 2. Which is lighter: ACM or SCM?
>> 3. Can aluminum composite panels be used outdoors?
>> 4. Are ACM panels fireproof?
>> 5. Can ACM be routed and folded?
>> 6. Can SCM panels hold magnets?
>> 7. What information should I provide for an OEM ACM panel quotation?
When selecting a panel for signage, retail displays, decorative walls, machine enclosures, or non-structural cladding, the decision often comes down to ACM vs. SCM panels. Aluminum Composite Material (ACM) is usually preferred for lightweight fabrication, weather resistance, printing, and visual applications. Steel Composite Material (SCM) is often selected when a project needs greater stiffness, impact resistance, or a magnetic surface.
However, choosing between aluminum composite panel and steel composite panel should never be based on appearance alone. The best material depends on the panel's intended use, installation environment, structural support, fabrication method, fire and building-code requirements, required finish, and total installed cost.
For buyers sourcing from an OEM aluminum composite panel manufacturer, the right decision begins with a clear specification—not simply a panel thickness or color request. At Gokai, we help global distributors, sign makers, fabricators, and project contractors evaluate panel construction, surface finish, dimensions, packaging, and customized OEM requirements before production begins.
Aluminum Composite Material, commonly called ACM or ACP, is a sandwich panel made of two thin aluminum skins bonded to a central core. Depending on the application and product grade, that core may be polyethylene (PE), mineral-filled fire-retardant material, or another engineered material.
A typical aluminum composite panel combines the weather-resistant appearance of aluminum with a lightweight core. This structure provides useful rigidity without the weight and cost associated with a solid aluminum sheet of comparable dimensions.
ACM is widely used in:
- Outdoor and indoor signs
- Shopfront signage and illuminated sign faces
- Digital printing and graphic mounting
- Retail displays and point-of-purchase units
- Exhibition stands and trade-show panels
- Interior wall decoration
- Ceiling systems and partitions
- Non-structural architectural facades
- Machine covers and fabricated enclosures
The major reason many fabricators choose ACM is simple: it offers a strong balance of low weight, flatness, visual quality, processing flexibility, and exterior durability.
Steel Composite Material, or SCM, is also a sandwich panel, but its outer skins are made of steel rather than aluminum. Steel skins may be galvanized, coated, or otherwise treated depending on the intended environment and surface requirement.
Compared with ACM, SCM is generally heavier and may require more robust processing equipment. In return, it can provide higher stiffness, improved resistance to dents and impact, and magnetic functionality.
SCM is especially useful for:
- Magnetic menu boards
- Writable dry-erase boards
- Magnetic retail displays
- Changeable information boards
- POP and POS display systems
- Interior decorative wall panels
- Heavy-duty sign panels
- Durable indoor or protected outdoor applications
A steel composite panel is not automatically the "better" panel. It is the better choice only when its specific performance advantages—especially magnetism and stiffness—solve a genuine project requirement.
The following table offers a practical comparison for buyers, designers, distributors, and fabricators.
| Feature | Aluminum Composite Material (ACM) | Steel Composite Material (SCM) |
|---|---|---|
| Outer skins | Aluminum | Steel, often galvanized or coated |
| Weight | Lightweight | Heavier than ACM |
| Magnetic surface | Normally non-magnetic | Magnetic receptive |
| Corrosion resistance | Strong natural resistance to rust | Requires suitable coating and edge protection |
| Stiffness | Good stiffness for signage and display work | Typically higher stiffness at similar thickness |
| Fabrication | Easy to cut, route, drill, bend, and fold | Can require more robust cutting and forming tools |
| Printability | Excellent for digital printing, films, paints, and graphics | Good printable surface, depending on coating |
| Exterior use | Common for signage and suitable non-structural exterior projects | Possible with proper coating and detailing |
| Typical applications | Signs, graphics, displays, decorative panels, fabricated trays | Magnetic boards, durable displays, writable panels, menu systems |
| Customization potential | High: color, thickness, finish, coating, size, protective film | High: coating, color, magnetic or writable surface, size |
| Main buying advantage | Lower weight and versatile appearance | Magnetic function and enhanced rigidity |
The most important rule is this: choose the performance you need, not the material that merely sounds stronger.
For many sign makers and display fabricators, ACM is the default panel because it is light enough to handle efficiently while still delivering a flat, stable, professional-looking surface.
Weight affects more than shipping cost. It affects how easily a panel can be moved, lifted, mounted, transported, and supported.
For a large wall sign, shopfront fascia, exhibition panel, or hanging display, lower weight can reduce the demand on the support frame and simplify installation. In projects where installers work at height or handle large panel dimensions, this can improve labor efficiency and lower operational risk.
Quality aluminum composite panels can be cut, routed, drilled, sawed, grooved, folded, and formed using suitable conventional fabrication equipment. Industry fabrication guidance notes that ACM can be processed with common woodworking or metalworking tools, subject to the product's specific technical instructions and tooling requirements.
Common ACM fabrication operations include:
- CNC routing
- V-grooving
- Folding into trays or cassettes
- Saw cutting
- Drilling
- Riveting
- Adhesive bonding
- Vinyl application
- Screen printing
- UV printing
- Direct digital printing
For example, a sign fabricator may route V-grooves into the rear of a 3 mm or 4 mm ACM sheet, fold the edges, and create a clean three-dimensional sign tray. This can achieve a premium architectural look without using heavier solid metal sheet.
Aluminum does not rust in the same way as unprotected carbon steel. This makes ACM attractive for outdoor signs, decorative panels, and projects exposed to humidity, rain, or changing weather conditions.
That said, corrosion resistance is not a substitute for good design. In coastal, industrial, or high-humidity environments, the complete system still matters:
- Panel coating type
- Cut-edge protection
- Fastener selection
- Dissimilar-metal separation
- Drainage design
- Joint and sealant detailing
- Cleaning and maintenance practice
When aluminum comes into direct contact with materials such as raw steel, copper, brass, bronze, or iron, designers should consider galvanic corrosion risk and use a suitable barrier or protective separation where necessary.
SCM provides benefits that ACM cannot replicate directly. Its key advantage is the steel face: magnets can attach to it, making the panel suitable for reusable, changeable, or interactive visual systems.
For restaurants, schools, offices, retail stores, warehouses, and event venues, magnetic panels can reduce the need to replace an entire board when content changes.
Typical applications include:
- Daily menu boards
- Scheduling boards
- Warehouse planning boards
- Product information panels
- Classroom boards
- Retail promotion displays
- Magnetic visual-management systems
This is particularly valuable for a buyer that needs long-term flexibility. Instead of printing and replacing a full display repeatedly, staff can update only the magnetic elements.
Steel generally has a higher modulus than aluminum, so steel-skinned composite panels can feel more rigid at a comparable panel thickness. This can help where a panel needs to resist handling damage, repeated use, or localized impacts.
Still, greater stiffness should not be confused with structural engineering approval. Neither ACM nor SCM should be treated as a load-bearing structural element unless the project has been designed and approved by qualified engineering professionals.
One of the largest specification mistakes is ordering a panel based only on surface color, total thickness, or aluminum skin thickness while ignoring the core.
For aluminum composite panels, the core strongly influences:
- Weight
- Rigidity
- Cost
- Fire behavior
- Intended application
- Regulatory suitability
- Fabrication behavior
Common core categories include standard thermoplastic cores, fire-retardant mineral-filled cores, highly mineral-filled cores, and non-combustible core systems. FM Global's technical research explains that the combustibility of ACM is largely determined by its core composition. It describes typical ranges from fully combustible polymer cores through mineral-filled fire-retardant systems and non-combustible core options.
For architectural exterior cladding, a critical distinction must be made: fire performance is often evaluated for the complete wall assembly, not just the panel itself.
A wall system can include:
- ACM or metal composite cladding
- Air cavity
- Attachment rails and brackets
- Exterior sheathing
- Insulation
- Weather-resistive barrier
- Sealants and joint design
FM Global notes that exterior cladding assemblies can include several combustible components, including the cladding, continuous insulation, and weather-resistive barrier. The interaction of these components affects fire performance.
For U.S. projects, NFPA 285 is commonly referenced for certain exterior wall assemblies containing combustible components. It is a large-scale evaluation of exterior wall assembly fire propagation characteristics—not a simple universal certificate that can be transferred from one panel to every wall design.
Therefore, for high-rise, public, regulated, or fire-sensitive construction, buyers should:
1. Confirm the local code requirements with the project architect, consultant, or authority having jurisdiction.
2. Request the exact technical documents relevant to the proposed system.
3. Verify whether the panel core, insulation, weather barrier, subframe, and installation configuration match the tested assembly.
4. Avoid claiming that a standard PE-core panel is appropriate for every facade application.
5. Use qualified engineering and code professionals for final compliance decisions.
This is not merely a legal formality. It is a technical and safety-critical part of specification.
A panel can be manufactured correctly and still fail in service if it is installed without allowing for movement.
Aluminum composite panels expand as temperatures rise and contract as temperatures fall. A fabrication manual from ALPOLIC identifies a coefficient of thermal expansion of 13×10−6 per °F for its ACM system and provides a formula for estimating panel movement based on temperature change and panel length.
In practical terms, long panels, dark finishes, high solar exposure, and wide temperature swings increase the importance of movement allowances.
For many ACM applications, installers should consider:
- Allowing sufficient movement at fixing points
- Avoiding excessive fastener tightening
- Designing joints with appropriate clearance
- Using compatible sealants and adhesives
- Keeping drainage paths open
- Accounting for panel orientation and finish direction
- Separating incompatible metals where needed
- Following the approved fabrication and installation guide for the specific product
Metallic, pearlescent, and directional finishes also require careful handling. Panels should be installed consistently according to their directional markings, and mixed production lots should be evaluated before use on a single visible elevation to reduce color-appearance variation.
A good material decision starts with the end use, not the product catalog.
Ask whether the panel is intended for signage, printing, interior decoration, retail display, magnetic function, machine housing, or exterior cladding.
A digitally printed retail board and an exterior architectural rainscreen may both use composite panels, but their technical requirements are completely different.
Choose ACM when the priority is:
- Lightweight handling
- High-quality printability
- Easy routing and folding
- Corrosion resistance
- Decorative appearance
- Outdoor signage performance
Choose SCM when the priority is:
- Magnetic attachment
- High stiffness
- Writable or dry-erase functionality
- Repeated handling
- Durable display-board performance
Consider UV exposure, rain, humidity, salt air, industrial pollution, temperature range, wind exposure, and cleaning requirements.
For outdoor projects, request details on coating type, coating thickness, gloss level, color durability expectations, aluminum skin thickness, protective film, and recommended maintenance.
Before ordering, confirm whether the panel will be CNC routed, folded, drilled, riveted, adhesive-bonded, printed, laminated, or mounted on a frame.
A panel that works well for flat-bed UV printing may not be the best choice for deep routing, tight bends, or demanding exterior forming.
For a successful OEM aluminum composite panel order, share the following information with your supplier:
- Application and project location
- Desired panel type: ACM or SCM
- Core type requirement
- Total panel thickness
- Aluminum or steel skin thickness
- Surface finish and color
- Paint or coating system
- Required dimensions and cutting tolerance
- Protective film branding or printing
- Packaging requirements
- Quantity per color, size, or finish
- Target loading method and destination port
- Required certifications or test documents
- Intended fabrication and installation method
The more complete the specification, the more reliable the finished product, pricing, delivery plan, and quality-control process will be.
Gokai supplies aluminum composite panel and related sheet materials for global customers requiring flexible OEM support. For distributors, wholesalers, sign-material brands, fabricators, and project buyers, OEM service should go beyond placing a logo on protective film.
A useful OEM program may include customization of:
- Panel dimensions
- Thickness options
- Aluminum skin thickness
- Surface color and gloss level
- Solid, metallic, brushed, mirror, marble, wood-grain, or specialty finishes
- PE, FR, or other project-appropriate core options
- Protective film design
- Private-label packaging
- Pallet configuration
- Container loading plans
- Product documentation and sample approval process
Before mass production, Gokai recommends confirming an approved sample, final color reference, panel construction, packaging standard, and inspection criteria. This helps prevent the most common international purchasing problems: color mismatch, wrong film direction, incorrect thickness, edge damage, insufficient packaging protection, and inconsistencies between approved samples and bulk production.
The right panel can improve fabrication speed, installation efficiency, appearance, product durability, and long-term customer satisfaction. The wrong panel can create avoidable issues with weight, finish consistency, corrosion, movement, fabrication, or code suitability.
Contact Gokai today to discuss your aluminum composite panel, steel composite panel, OEM branding, custom-size, color, packaging, and export requirements. Send us your application details, drawings, samples, or target specifications, and our team can help you identify a suitable panel solution before you place your order.
In many markets, ACM and ACP are used interchangeably. ACM means Aluminum Composite Material, while ACP means Aluminum Composite Panel. Both usually describe a panel with aluminum skins bonded to a core material. However, buyers should still verify the exact panel structure, core type, skin thickness, coating, and intended use.
ACM is generally lighter because aluminum is less dense than steel. This makes ACM particularly suitable for signs, displays, fabricated trays, and applications where easier handling or lower support demand is important.
Yes, many ACM products are used outdoors for signage, decorative panels, and certain cladding applications. However, outdoor suitability depends on the coating, panel construction, installation method, UV exposure, moisture conditions, joint design, and project-specific code requirements.
Not necessarily. Fire behavior depends heavily on the core and the complete installed wall assembly. Standard polymer-core ACM, fire-retardant-core ACM, mineral-filled ACM, and non-combustible systems do not offer the same performance. For regulated facade work, confirm project-specific testing, code requirements, and system documentation with qualified professionals.
Yes. ACM is commonly cut, routed, drilled, and folded for signs, display structures, and architectural details. Fabricators should use the tooling, groove depth, bend radius, and processing parameters recommended for the specific product.
Yes. SCM uses steel skins, which normally allow magnets to attach to the panel surface. This makes SCM a practical choice for magnetic signs, menu boards, dry-erase boards, and reusable display systems.
Provide the application, panel thickness, skin thickness, core type, dimensions, color or finish, coating requirement, quantity, protective film artwork, packaging request, destination port, and any certification or testing needs. If the project includes fabrication, also provide routing, folding, printing, or mounting requirements.
1. Piedmont Plastics. "[ACM vs. SCM Panels: Key Differences & Best Uses]." Accessed September 25, 2026.
Used for the baseline ACM-versus-SCM comparison, typical applications, differences in magnetic function, fabrication, corrosion considerations, and selection criteria.
2. FM Global. "[Evaluation of the Fire Performance of Aluminum Composite Material (ACM) Assemblies Using ANSI/FM 4880]." December 2017.
Used for the discussion of ACM core combustibility, exterior wall assembly components, insulation and weather-resistive barriers, and the importance of assembly-level fire evaluation.
3. ALPOLIC. "[Fabrication Manual: Painted ACM PE and FR Core]."
Used for fabrication methods, thermal expansion guidance, bending considerations, directional finishes, joining methods, dissimilar-metal corrosion precautions, drilling, cutting, routing, and processing recommendations.
4. ALPOLIC Americas. "[Demystifying Fire Code Compliance and MCM]." May 13, 2022.
Used as supplementary context for the distinction between panel-level claims and full exterior wall assembly fire evaluation.
5. Metal Construction Association. "[Cladding Safety with Metal Composite Material (MCM) and NFPA 285]."
Used as supplementary context for NFPA 285 and exterior wall systems containing combustible components.
6. 3A Composites USA. "[ALUCOBOND PLUS and FaceFastened Pass NFPA 285 Fire Code Testing]." November 16, 2023.
Used as an example of how fire-test results relate to a specific panel-and-wall-system configuration rather than to all ACM applications universally.
