Steel composite materials is a durable, magnetic receptive, printable, flame retardant, and self-supporting material, great for signage and interior design.

Steel Composite Material (SCM)
Made from galvanized steel skins bonded to a PE core, SCM offers great strength, durability, and magnetic receptiveness.
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Cut-to-Size, Routing
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Product Overview
Widely used for:
Performance Characteristics:
Typical Properties of Steel Composite Material (SCM)
Common Properties
- Common Brand Names SteelPOLY®
- Typical Thickness Size 3 mm
- Typical Lengths 96, 144 in
- Typical Widths 48, 60 in
- Friendly Names Steel Composite, Hybrid Steel
- Common Profiles Sheet
Physical Properties
- Density 1.2g/cm³
- Water Absorption 0.3%
- Moisture Absorption at Equilibrium 0.7%
- Linear Mold Shrinkage 0.005cm/cm
- Melt Flow 10g/10 min
Mechanical Properties
- Hardness, Rockwell R 100HRR
- Tensile Strength, Ultimate 85MPa
- Tensile Strength, Yield 65MPa
- Elongation at Break 50%
- Elongation at Yield 5%
- Modulus of Elasticity 2000MPa
- Flexural Yield Strength 70MPa
- Flexural Modulus 2100MPa
- Compressive Yield Strength 80MPa
- Bearing Yield Strength 75MPa
- Shear Strength 50MPa
- Izod Impact, Notched 15J/m
- Izod Impact, Unnotched 25J/m
- Gardner Impact 30J
- Falling Dart Impact 40J
- Instrumented Impact Total Energy 35J
Thermal Properties
- CTE, linear 50 - 100µm/m-°C
- CTE, linear, Transverse to Flow 50 - 100µm/m-°C
- Deflection Temperature at 0.46 MPa (66 psi) 120 - 160°C
- Deflection Temperature at 1.8 MPa (264 psi) 70 - 100°C
- Vicat Softening Point 200 - 250°C
- Flammability, UL94 V0 - V2
- Max Continuous Operating Temperature 150 - 200°F
- Minimum Operating Temperature - 20°F
- Thermal Conductivity 0.15 - 0.25W/m-K
Literature and Data Sheets
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Piedmont Sign Grade SteelPOLY Piedmont PlasticsView
Steel Composite Material from Piedmont Plastics
Piedmont Plastics is your trusted plastic sheet distributor and supplier of steel composite material. Also known as SCM, our steel composite is a proven structural composite material featuring two external steel skins thermally bonded to a polyethylene core. This combination creates a strong, durable, and aesthetically pleasing material perfect for a variety of demanding applications, from displays and signage to interior design.
Our steel composite material is magnetic receptive and comes with a smooth surface that works well with dry-erase markers and direct printing. This makes it perfect for use in everything from retail displays and menu boards to trade show booths, indoor signs, and wall coverings. It's also commonly used in interior design applications that require a clean, modern look with added functionality.
Each steel composite sheet is available in a standard 4' x 8' size with a 3mm thickness, making it easy to fabricate and install. Whether you're working on a project for a school, office, store, or exhibition, SCM offers the strength, appearance, and flexibility to get the job done right.
As a leading plastic distributor, Piedmont Plastics provides expert support and nationwide access to SCM as well as other performance plastic materials. Contact us today to speak with your local plastic sheet distributor and learn how our steel composite material can support your next project. Ask about our Piedmont Sign Grade® SteelPOLY® to get started!


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Key Features of Steel Composite Panels
Strength and Durability: The galvanized steel skins provide exceptional strength and impact resistance, ensuring longevity in various applications.
Magnetic Receptiveness: One side of the material is optimized for dry-erase use, making it ideal for magnetic boards and other similar applications.
Printable Surface: The opposite side offers a superior print surface, allowing for high-quality graphics and designs.
Flame Retardance: Our Steel Composite Material is designed to be flame retardant, providing an added layer of safety and protection in applications where fire resistance is crucial.
Self-Supporting: The stiffness of the material allows it to maintain its form without additional support, making it ideal for various structural uses.
Benefits of SCM
Common Applications for SCM
Steel Composite Material is versatile and suitable for a wide range of applications, including:
Point of Sale/Point of Purchase (POS/POP) Displays: SCM is ideal for creating attractive and durable displays that grab customer attention.
Menu Boards: Perfect for restaurants and cafes, this material offers a professional look that is easy to update.
Interior and Exterior Signage: Suitable for both indoor and outdoor signs, SCM provides a durable and weather-resistant solution.
Interior Design: SCM adds a modern and functional touch to interior spaces, including wall panels, whiteboard architecture, and decorative elements.
Real Estate Signage: Durable and weather-resistant, SCM is perfect for real estate signs that need to withstand outdoor conditions.
Ceiling and Wall Panels: Due to its strength and clean appearance, SCM enhances both the aesthetic and functional aspects of interiors.
Related Products
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Aluminum Composite Material (ACM)
ACM combines durability, versatility, and aesthetic appeal to elevate your projects, from signage to architectural facades and wall linings.
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Magnetic Materials
Vinyl is a strong, durable, low-cost material that is available in a variety of forms. It is resistant to moisture and temperature extremes, making it ideal for indoor and outdoor use.
Frequently Asked Questions About SCM
At Piedmont Plastics, we offer high-quality SCM panels that are designed to meet a wide range of industrial, commercial, and creative needs. Below are answers to the most commonly asked questions about steel composite material.
SCM is a rigid panel made by bonding two thin layers of steel—typically galvanized or stainless steel—to a polyethylene (PE) core. This creates a strong yet lightweight sheet that combines the durability of steel with the versatility of plastic.
SCM consists of two thin steel skins bonded to a polyethylene (PE) core, while ACM is made with two thin aluminum skins bonded to a similar core. SCM is heavier, stronger, and magnetic receptive, while ACM is lighter and more corrosion-resistant.
Yes, SCM is magnetic receptive. This makes it a great option for applications like whiteboards, menu boards, and other surfaces that use magnets.
Yes. SCM panels have a smooth, coated surface that is compatible with direct digital printing, screen printing, and vinyl graphics.
SCM can be cut and fabricated using standard metalworking tools or CNC machinery. Piedmont Plastics offers custom cutting and fabrication services to meet specific project requirements.
Why Order SCM Sheet from Piedmont Plastics?
Piedmont Plastics is proud to be your trusted source for steel composite material (SCM). We understand the importance of using reliable, high-performance materials, and our SCM delivers the strength, versatility, and finish that modern applications demand. Whether you're working in signage, retail, architecture, or design, our team is here to help you succeed with the right products and expert support.
Extensive Product Options: Our steel composite panels are available in standard 4' x 8' sizes with a durable 3mm thickness. Each sheet features two strong steel skins bonded to a lightweight polyethylene core, offering a clean, smooth finish and outstanding strength-to-weight ratio.
Custom Fabrication Services: Need something specific? Our advanced CNC cutting and fabrication capabilities allow us to deliver custom SCM sheets tailored to your exact project requirements.
Industry Expertise: With decades of experience as a leading plastic supplier, we know how to match the right material to your unique needs. Our team is here to provide personalized guidance on SCM and other plastic sheet solutions.
Convenient Distribution: As a nationwide plastic distributor with branches across North America, we ensure fast, dependable access to steel composite material and other high-performance plastics wherever your operations are located.
Quality You Can Trust: We maintain strict quality control to ensure our SteelPOLY® SCM panels meet or exceed industry standards for durability, workability, and performance.
Ready to elevate your projects with our Steel Composite Material? Contact us today to learn more about how our SCM can meet your specific needs!
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