WILLSTRONG® SCP Steel Composite Panel
High-strength steel composite panel with a mineral core for durable façades, storefronts, tunnels and shading systems.
Product Introduction
Combining the structural strength and authentic metallic appearance of steel with a high-performance core, WILLSTRONG® SCP Steel Composite Panel is designed for architectural cladding applications that require strength, dimensional stability and distinctive surface expression.
The panel uses a lightweight composite construction to reduce the weight associated with solid steel while improving flatness and resistance to distortion. Its rigid steel facings and engineered core provide enhanced flexural performance and impact resistance, making it suitable for modern façades, industrial-style interiors, storefronts, tunnel linings and shading systems.
Depending on the project requirements, the steel composite panel is available in non-combustible, fire-retardant and standard configurations. A wide selection of metal finishes further allows designers to achieve industrial, contemporary, decorative or highly textured architectural effects.
Key Product Advantages
High Structural Strength
The rigid steel facings provide high mechanical strength and excellent dimensional stability. The composite sandwich structure improves flexural performance and helps the panel maintain its shape across long-span façade applications.
Compared with solid steel sheets, the composite structure reduces overall weight while retaining a strong and durable exterior surface.
Excellent Flatness
The composite construction helps overcome common distortion and oil-canning concerns associated with large traditional sheet-metal panels. This supports cleaner architectural lines and more consistent visual surfaces.
Impact Resistance
The rigid steel outer layers combined with the engineered core provide strong resistance to impact, making the panel suitable for applications where surface durability and structural integrity are important.
Fire Performance Options
For projects with demanding fire-safety requirements, mineral-filled core configurations are available. The non-combustible option combines steel facings with a high-performance mineral core, while the fire-retardant option uses a B1 flame-retardant mineral core with fire-suppressant additives.
Lightweight Composite Construction
The sandwich structure offers a balance between strength and weight. This can simplify panel handling, fabrication and installation compared with heavier solid steel cladding solutions.
Wide Range of Surface Finishes
The product can be supplied with multiple metallic and decorative finishes, including natural copper, brass, antique, titanium-coated, textured, brushed, mirror, design and special finishes.
Surface effects can also include rust-pattern, stone, artisanal texture and gold finishes for different architectural design concepts.
Weather and Surface Durability
The panel is engineered for long-term architectural use with coating performance designed to withstand impact, abrasion, salt spray, chemical exposure, accelerated weathering, damp heat and other environmental conditions.
Low-Maintenance Architectural Solution
Its durable steel surface and protective finishing system provide a practical cladding solution for projects requiring long-term appearance retention and reduced maintenance requirements.
Product Configurations
Non-combustible Steel Composite Panel
The premium non-combustible configuration combines high-rigidity steel facings with a high-performance mineral-filled core. The composite structure provides strong flexural performance, impact resistance and fire performance while maintaining a lighter construction than solid steel.
This configuration is suitable for architectural projects where non-combustible construction and structural performance are important considerations.
Fire-retardant Steel Composite Panel
The fire-retardant configuration uses steel facings with a B1 flame-retardant high-performance mineral core incorporating effective fire-suppressant additive compounds.
This structure provides high load-bearing capability, acoustic performance, low smoke emissions and enhanced flame-retardant performance for building applications with additional fire-safety requirements.
Standard Steel Composite Panel
The standard configuration consists of durable steel layers and a lightweight polyethylene core. It provides convenient handling, high rigidity, impact resistance and cost-efficient performance for applications such as signage, storefronts and general construction projects.
The appropriate configuration should be selected according to the required fire rating, building code, structural requirements and application environment.
Dimensions & Size
| Specification | Available Options |
|---|---|
| Panel Thickness | 2.5mm / 3mm / 4mm / 5mm / 6mm |
| Metal Sheet Thickness | 0.3mm / 0.4mm / 0.5mm / 0.6mm / 0.8mm / 1.0mm |
| Width | 1220mm / 1250mm / 1500mm |
| Length | 1000–6000mm |
| Custom Dimensions | Available upon request |
Available finish series include:
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Natural Copper Series
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Brass Series
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Antique Series
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Titanium Coating
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Textured Series
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Brushed Series
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Mirror Series
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Design Series
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Special Finishes
Fire Ratings
The available fire-performance configurations have been tested against multiple international standards:
| Region / Standard | Fire Performance |
|---|---|
| EU EN13501-1 | A2-s1,d0 |
| EU EN13501-1 | B-s1,d0 |
| Germany DIN4102-7 | Passed |
| Singapore BS476-Part 6 | Fire propagation index = 1.0 |
| Singapore BS476-Part 7 | Class 0 |
| USA NFPA285 | Passed |
| USA ASTM E84-15a | Flame Spread Index 5; Smoke Developed Index 0 |
| China GB 8624-2012 | A2-s1,d0 |
| China GB 8624-2012 | B-s1,d0 |
| Russia GOST31251 | Passed |
Actual fire performance should be confirmed against the selected panel configuration and project requirements.
Technical Specifications
For the 4mm stainless steel configuration:
| Technical Property | FR-B,S1,d0 | FR-A2,S1,d0 |
|---|---|---|
| Panel Thickness | 4mm | 4mm |
| Stainless Steel Layer Thickness | 0.3mm | 0.3mm |
| Weight | 9.5 kg/m² | 10.3 kg/m² |
| Width | 1220/1250mm | 1220/1250mm |
| Section Modulus | 1.5 cm³/m | 1.5 cm³/m |
| Rigidity | 4500 kNcm²/m | 4500 kNcm²/m |
| Steel Alloy/Temper | SU304 | SU304 |
| Modulus of Elasticity | 200000 N/mm² | 200000 N/mm² |
| Tensile Strength | ≥520 N/mm² | ≥520 N/mm² |
| 0.2% Proof Stress | ≥205 N/mm² | ≥205 N/mm² |
| Elongation | ≥40% | ≥40% |
| Core | Mineral filled polymer | Mineral filled polymer |
| Film Thickness | ≥5 μm | ≥5 μm |
| Initial Gloss | 20–90 | 20–90 |
| Hardness | ≤92 HRB | ≤92 HRB |
Thermal Properties
| Property | Value |
|---|---|
| Linear Thermal Expansion | 1.7mm/m at 100°C |
| Thermal Resistance | 0.07 m²K/W |
| Thermal Conductivity | 1.63 W/mK |
| Heat Transfer Coefficient | 5 W/m²K |
| Temperature Resistance | -50°C to 80°C |
Acoustic Properties
| Property | Value |
|---|---|
| Sound Absorption Factor | 0.05 |
| Sound Transmission Loss | ≥25 dB |
Coating and Surface Performance
The surface treatment is designed to maintain appearance and functional performance under demanding architectural conditions.
| Performance Item | Requirement |
|---|---|
| Color Difference | ≤2.0 within same batch; ≤3.0 between batches of same color code |
| Impact Resistance | ≥50 kg.cm |
| Pencil Hardness | ≥2H |
| Adhesion | Class 0 |
| Hydrochloric Acid Resistance | No change with 5% HCl solution |
| Nitric Acid Resistance | No blistering or other changes; ΔE ≤5.0 |
| Solvent Resistance | No substrate exposure, blushing or dissolution for PVD/PVDF |
| Mortar Resistance | No change |
| Abrasion Resistance | ≥5L/μm |
| Salt Spray Resistance | Class 1 or better |
| Accelerated Weathering | ΔE ≤3.0; Chalking Class 0; no cracking or peeling |
| Damp Heat Resistance | No coating blistering or delamination; no rust spots on stainless steel |
| Boiling Water Resistance | No blushing, blistering or delamination for PVD titanium/PVDF coating |
Surface & Finish Options
Architectural projects can select from different visual treatments according to the desired design language and application:
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Rust-Pattern Finish
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Stone Finish
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Brushed Finish
-
Artisanal Texture
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Titanium-Coated Finish
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Gold Finish
-
Natural Copper
-
Brass
-
Antique
-
Mirror
-
Custom Design
-
Special Finishes
These options allow the same composite panel platform to support industrial, contemporary, premium metallic and decorative architectural concepts.
Application Areas
Facade Cladding
The high rigidity, flatness and surface durability make steel composite panels suitable for exterior façade systems where a strong metallic appearance and structural stability are required.
Storefronts and Signage
The standard configuration provides easy handling and good workability for storefronts, signage and commercial architectural elements.
Tunnel Linings
Durable steel surfaces and available fire-performance configurations make the panels applicable to tunnel lining projects subject to specific technical and fire requirements.
Shading Systems
The lightweight composite construction can be considered for architectural shading elements where reduced panel weight, rigidity and surface appearance are important.
Industrial-Style Interiors
Textured, brushed, antique, rust-pattern and other metallic finishes can create an authentic industrial visual effect for interior walls, feature surfaces and commercial spaces.
Fabrication and Selection Considerations
When specifying a steel composite panel, buyers should consider:
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Required fire rating and applicable building regulations.
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Panel thickness and steel facing thickness.
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Required width and panel length.
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Structural span and expected loading conditions.
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Exterior or interior installation environment.
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Surface finish, color and texture requirements.
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Chemical, salt spray and weather exposure.
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Fabrication, bending and installation requirements.
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Quantity and custom dimension requirements.
For façade and other structural cladding projects, the selected panel configuration should be matched with the supporting system, span, fixing method and engineering requirements.
B2B Supply Information
WILLSTRONG® provides steel composite panel solutions for architectural and construction applications, with multiple thicknesses, dimensions, surface treatments and fire-performance configurations available.
Custom dimensions and project-specific finishing requirements can be discussed according to order specifications. Buyers can request technical information, finish options, panel samples and application recommendations based on project requirements.
The product can be supplied for façade contractors, architectural material distributors, building material buyers, signage manufacturers, storefront fabricators and construction projects requiring steel-based composite cladding.
Product Summary
WILLSTRONG® SCP Steel Composite Panel combines steel strength, composite lightweight construction, excellent flatness, impact resistance and versatile metallic finishes. With standard, fire-retardant and non-combustible configurations, it is suitable for façades, storefronts, tunnel linings, shading systems and architectural interiors.
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