Stainless Steel Sandwich Panel

Stainless steel sandwich panels combine a high-density rock wool core with stainless steel facings for roofing and wall applications in industrial, commercial, and residential construction. The rock wool core, produced from basalt through high-temperature melting and fiberization, provides non-combustible insulation between structural stainless steel layers.

These panels achieve fire resistance ratings up to EI 120, thermal conductivity of 0.043 W/mK, and sound insulation up to 35 dB. They resist moisture, corrosion, and chemicals while maintaining dimensional stability across temperature variations. Available thicknesses range from 50-200 mm with steel sheet options of 0.4-0.8 mm thickness.

Standard widths include 950 mm, 1000 mm, or 1150 mm, with customizable lengths up to 12,000 mm. Rock wool core density typically ranges 100-140 kg/m³, contributing to mechanical strength and insulation performance. The materials contain no Chlorofluorocarbon (CFC), Hydrochlorofluorocarbon (HCFC), or asbestos.

Manufacturing uses automated production lines bonding pre-formed stainless steel sheets to rock wool cores with high-strength adhesives. Installation involves mechanical fasteners with neoprene washers for weather tightness. Maintenance requires periodic inspection and cleaning with mild soap, avoiding abrasive chemicals to preserve the stainless steel finish.

Global Supplier of Custom Stainless Steel Composite Panels

RaxPanel was established in 2002 and is a direct manufacturer based in Hebei, China, specializing in custom composite panel solutions. With 20+ years of experience and a multinational presence serving clients in 30+ countries, we leverage our high-volume production capacity—producing over 1500+ m² daily—to deliver superior stainless steel sandwich panels. Our panels feature a three-layer composition with high-density rock wool core and stainless steel facings, ensuring exceptional fire resistance, thermal insulation, and structural durability.

Thanks to our automated production processes and strict adherence to international quality standards, RaxPanel’s stainless steel sandwich panels offer remarkable installation efficiency, shortening construction periods by more than 40%. This makes them ideal for fast-constructed prefabricated buildings such as:

  • Industrial facilities
  • Cleanrooms
  • Commercial structures

With in-house R&D and a customer-centric approach, we provide personalized customization, guarantee reliable delivery, and ensure seamless communication—all backed by two decades of manufacturing excellence.

Parameter Category Parameter Value
Core Insulation Core Material Rock Wool (Basalt)
Core Density 100 – 140 kg/m³
Thermal Conductivity (λ) 0.043 W/mK
Fire Resistance Classification Class A1 (Non-combustible)
Fire Resistance Rating (EI) Up to EI 120
Acoustic Insulation Up to 35 dB
Water Absorption (by mass) ≤ 0.5%
Panel Construction Facing Material Stainless Steel
Steel Sheet Thickness 0.4 – 0.8 mm
Available Panel Thickness 50, 75, 100, 125, 150, 200 mm
Standard Panel Width 950, 1000, 1150 mm
Maximum Panel Length 12,000 mm
Panel Areal Weight (approx.) 15.5 – 36.5 kg/m²
Performance & Certification Thermal Transmittance (U-value) 0.20 – 0.63 W/m²K
Corrosion Resistance C1, C2, C3
Environmental Certifications Free from CFCs, HCFCs, Asbestos
Service Life 25+ years

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    Frequently Asked Questions

    What are the key advantages of RaxPanel's stainless steel sandwich panels?

    RaxPanel stainless steel sandwich panels offer excellent fireproof performance, thermal insulation, and sound absorption. They are naturally durable and stable over a building's lifetime, unaffected by temperature or humidity changes, ensuring energy savings and a comfortable environment. The panels are non-combustible, contribute to fire safety, and provide real noise reduction. Installation is fast, shortening construction periods by over 40%, and the product guarantees a life time of 25 years.

    What fire resistance ratings do RaxPanel stainless steel sandwich panels achieve?

    RaxPanel stainless steel sandwich panels are rated non-combustible (Class A1) and offer fire resistance of up to EI 90 / E 120 for certain thicknesses. They do not contribute to fire spread, shrink, stretch, or deform when exposed to fire, and produce no smoke or burning droplets. The panels can resist high temperatures, with some configurations providing up to 120 minutes of fire resistance.

    How are RaxPanel stainless steel sandwich panels installed?

    RaxPanel stainless steel sandwich panels are produced in accordance with building layout drawings for fast and flexible installation. They can be installed vertically or horizontally on single- or multi-span structures, often using hidden joints for an aesthetic finish. The construction period can be shortened by more than 40%, making them ideal for prefabricated buildings. Proper storage and handling are recommended to avoid exposure to weather.

    What customization options are available for thickness and dimensions?

    RaxPanel stainless steel sandwich panels are available in thicknesses of 50mm, 75mm, 100mm, 125mm, 150mm, and up to 200mm. The effective width is typically 1000mm (with options for 950mm or 1150mm), and length is customized as required, though usually limited to less than 12000mm for transportation. Steel thickness options range from 0.3mm to 1.0mm.

    What applications are RaxPanel stainless steel sandwich panels suitable for?

    RaxPanel stainless steel sandwich panels are applied as external walls, internal division walls, ceilings, and for object insulation. They are ideal for industrial buildings, warehouses, logistic centers, commercial offices, food industry facilities, agricultural objects, sports halls, clean rooms, and residential buildings. Their fireproof and acoustic properties make them suitable for environments with high safety and noise reduction requirements.

    How do RaxPanel stainless steel sandwich panels perform in terms of thermal and acoustic insulation?

    RaxPanel stainless steel sandwich panels have a thermal conductivity (λ) of 0.043 W/mK, providing excellent thermal insulation. Acoustic insulation is up to 27 dB for standard configurations, with noise reduction coefficients (NRC) ranging from 0.80 to 0.95. The panels help maintain stable indoor temperatures and significantly reduce external noise, enhancing comfort and energy efficiency.

    What is the expected lifespan and maintenance requirement for RaxPanel stainless steel sandwich panels?

    RaxPanel stainless steel sandwich panels are produced under strict quality management systems, ensuring a guaranteed lifespan of 25 years. They require minimal maintenance; however, for long-term storage, panels should be kept indoors or, if outdoors, stacked clear of the ground and covered with a weather-proof sheet. Regular inspections for damage and cleaning with mild soap and water are recommended.

    What level of customization and collaboration do you offer for large-scale OEM integration projects?

    We work closely with manufacturers throughout the product innovation process, from initial preparation and testing stages to the creation of tailored solutions. Our panels are produced in full accordance with building layout drawings, ensuring a customized product for your specific process. With production capabilities including thicknesses from 50mm to 200mm, various steel thickness options (0.3mm-1.0mm), and multiple facing materials (galvanized, aluminum, stainless steel), we can accommodate deep customization requirements. The sophisticated production process ensures high-density rock wool insulation with strong adhesion between the core and metal plates, providing excellent stiffness and performance for your integration needs.

    How do you support technical specifiers and contractors with the documentation needed for project planning and compliance?

    We provide comprehensive technical documentation including detailed technical data sheets, performance test reports, and material samples. Our products come with all quality and fire resistance certificates, with fire resistance ratings of EI 90 / E 120 and corrosion resistance classifications of C1, C2, C3. Technical parameters include thermal conductivity of 0.043 W/mK, acoustic insulation of 27 dB, and panel areal weights ranging from 15.50 to 36.50 kg/m² depending on thickness. The rock wool core material density of 100-120 kg/m³ ensures consistent performance, and we offer detailed specifications for thermal transmittance U-values across different thickness options to meet your project's compliance requirements.

    What supply chain advantages can distributors and large-volume buyers expect for maintaining consistent inventory?

    With 20+ years of manufacturing experience and a daily output of 1500+ m², we ensure reliable supply chain stability for bulk orders. We maintain stock of standardized products and samples in multiple colors, and our production process follows international quality management systems to guarantee consistent quality. The automatic production machine operates at constant temperature, and all raw materials and processes are in strict accordance with quality standards, ensuring product stability and a guaranteed lifetime of 25 years. We offer just-in-time delivery capabilities and can accommodate customized production schedules to meet your inventory turnover needs while maintaining favorable pricing for bulk orders.

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