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Weathering Steel Composite Panel
WILLSTRONG® Steel Composite Panel (SCP) combines the high structural strength and unique visual texture of steel (including Corten/Weathering Steel and Stainless Steel) with a high-performance mineral core. It overcomes the heavy weight and oil-canning issues of traditional sheet metal, offering extraordinary flatness and superior impact resistance.
Designed for modern architectural façades, industrial-style interiors, and high-load structural cladding, SCP delivers an authentic metallic aesthetic with exceptional structural integrity.
Premium Steel Composite Panel features a high-rigidity steel surface combined with a high-performance mineral core.
Its sandwich structure provides superior flexural strength and impact resistance over aluminum, weighs less than solid steel, and resists distortion on long-span façades.
Steel composite panel has steel facings and a B1 flame-retardant high-performance mineral core with effective new fire suppressant additive compounds.
This construction provides excellent high load-bearing capacity, superior overall acoustic performance, and B1 flame retardancy with very low smoke emissions.
Steel composite panel is formed with durable steel layers and a lightweight polyethylene core that offers very easy overall handling.
It offers high rigidity, excellent impact resistance, overall cost efficiency, and a durable low-maintenance solution for various building construction projects.
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 | ||
Natural Copper Series | √ | √ | √ |
Brass Series | √ | √ | √ |
Antique Series | √ | √ | √ |
Titanium Coating | √ | √ | √ |
Textured Series | √ | √ | √ |
Brushed Series | √ | √ | √ |
Mirror Series | √ | √ | √ |
Design | √ | √ | √ |
Special Finishes | √ | √ | √ |
Remark: Custom dimensions are available upon request
EU | EN13501-1 | A2-s1, d0 |
EU | EN13501-1 | B-s1, d0 |
Germany | DIN4102-7 | Passed |
Sigapore | BS476-Part 6 | Fire propagation index=1.0 |
Sigapore | 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 |
| THICKNESS | STANDARDS | UNIT | 4 | 4 | |
|---|---|---|---|---|---|
| Fire | FR-B,S1,d0 | FR-A2,S1,d0 | |||
| Thickness of Stainless Steel Layers | mm | 0.3 | 0.3 | ||
| Weight | kg/m² | 9.5 | 10.3 | ||
| Width | mm | 1220/1250 | 1220/1250 | ||
| TECHNICAL PROPERTIES | |||||
| Section modulus | W | cm³/m | 1.5 | 1.5 | |
| Rigidity | EJ | KNcm²/m | 4500 | 4500 | |
| Alloy/Temper of Stainless Stell Layers | SU304 | SU304 | |||
| Modulus of Elasticity | N/mm² | 200000 | 200000 | ||
| Tensile Strength of Aluminum | N/mm² | ≥520 | ≥520 | ||
| 0.2%Proof Stress | N/mm² | ≥205 | ≥205 | ||
| Elongation | % | ≥40 | ≥40 | ||
| Linear Thermal Expansion | 1.7mm/m at 100°c temperature | 1.7mm/m at 100°c temperature | |||
| CORE | Mineral filled polymer | Mineral filled polymer | |||
| SURFACE | |||||
| Lacquering | Galvanized | Galvanized | |||
| Film Thickness | µm | ≥5 | ≥5 | ||
| Gloss(initial value) | 20-90 | 20-90 | |||
| Hardness | ≤92HRB | ≤92HRB | |||
| ACOUSTICAL PROPERTIES | |||||
| Sound Absorption Factor | 0.05 | 0.05 | |||
| Sound Transmission Loss | db | ≥25 | ≥25 | ||
| THERMAL PROPERTIES | |||||
| Thermal Resistance | R | m²k/w | 0.07 | 0.07 | |
| Thermal conductivity | w/mk | 1.63 | 1.63 | ||
| Heat transition coefficient | U | w/m²k | 5 | 5 | |
| Temperature Resistance | °c | -50 | 80 |
Color difference (ΔE) | Within same batch: ≤ 2.0; Between different batches of same color code: ≤ 3.0 | |
Impact resistance | ≥50kg.cm | |
Pencil hardness | ≥2H | |
Adhesion | Class 0 (cross-cut intact, no coating detachment) | |
Gloss deviation | Gloss < 10 | ±5 |
20 ≤ Gloss < 40 | ±7 | |
Gloss ≥ 80 | ±8 | |
Resistance to hydrochloric acid | No change (5% HCl solution) | |
Resistance to nitric acid | No blistering or other changes; ΔE ≤ 5.0 | |
Solvent resistance | PVD and PVDF: no substrate exposure, no blushing, no dissolution | |
Mortar resistance | No change | |
Abrasion resistance | ≥5L/ μm | |
Salt spray resistance | Class 1 or better | |
Resistance to accelerated weathering | Color difference ΔE ≤ 3.0; Chalking class 0; no cracking or peeling | |
Damp heat resistance | No blistering of coating / plated layer; No delamination of honeycomb adhesive bond; No rust spots on stainless steel substrate | |
Boiling water resistance | PVD titanium coating and PVDF coating: no blushing, blistering, or delamination | |
Steel composite panels perform exceptionally in facades, storefronts, tunnel linings, and shading systems.
Advanced processing techniques ensure a smooth, robust surface that maintains its integrity over the long term.
Its sleek modern surfaces and versatile finishes creates lasting contemporary looks.
Its rich warm tones and natural patina create a timeless finish that ages beautifully.
