SPA-C is formed by cold rolling on the basis of hot-rolled SPA-H, and is finished by multi-pass rolling mill to achieve:
Improved surface accuracy: The thickness tolerance of the steel plate is controlled at ±0.05mm, and there is no oxide scale on the surface, which directly presents a metallic luster base, providing an ideal carrier for the uniform adhesion of the rust layer
Optimized mechanical properties: Grain refinement increases the yield strength by 10%, and the cold bending performance reaches d=1.5t (t is thickness), supporting precision bending processing of R≤50mm
Dimensional stability: Plate straightness ≤1mm/m, suitable for making large-size curtain wall panels (maximum processing width 1500mm× length 12000mm)
unique advantage
Excellent weather resistance: In harsh environments such as acid rain, salt spray, and industrial pollution, the corrosion rate is only 1/10 of that of ordinary steel, and the service life is up to 30-50 years
Strong aesthetic expression: The texture formed by natural rust changes over time, and the thickness of the rust layer can be customized (50-150μm), which is suitable for various design languages such as industrial style, wabi-sabi style, and retro style
Excellent processing performance: It can be cold-bent (bending radius ≤2t), welded (no special welding rods required), punched, and supports complex modeling processing
Green and environmentally friendly: 100% recyclable, the production process reduces more than 90% of coating pollution, and meets the requirements of LEED and China Three-Star Green Building Certification
product application
1. High-end building facade curtain wall
Applicable scenarios: super high-rise buildings, commercial complexes, cultural landmarks
2. Interior decoration and art installations
Rust screen/partition: 3mm thick SPA-C cold-rolled plate is hollowed out by laser cutting, and the surface is sealed (such as silane impregnation). No rust liquid seepage is used in an indoor environment with a humidity of ≤70%
Ceiling and wall decoration: 5mm Thick plates are bent into wavy or zigzag shapes, and warm light lighting highlights the metal texture of the rust layer, which is suitable for cultural and creative parks and high-end clubs.
3. Precision landscape sculptures and installations
Technical highlights:
Thickness tolerance ±0.05mm ensures the accuracy of curved surface modeling, suitable for 3D printing mold molding (such as hyperbolic sculptures)
The width of the welding heat-affected zone is ≤5mm, which can achieve millimeter-level fine welding and retain the integrity of the surface rust layer
Typical applications: Abstract art sculptures in urban squares, iconic installations in real estate demonstration areas, such as the material comparison design of mirror stainless steel and SPA-C rust plate
4. Special environment high durability projects
Coastal high salt fog environment: In areas with Cl⁻ concentration ≥1000ppm (such as Hainan and Okinawa, Japan), the corrosion resistance of SPA-C is 8 higher than that of ordinary cold-rolled steel times, it is recommended to match the edge with stainless steel edging for waterproofing
FAQ
1. Q: How is SPA-C produced differently from SPA-H?
A: SPA-C is cold-rolled from hot-rolled SPA-H, with multi-pass rolling for ±0.05mm thickness tolerance and oxide-free surface.
2. Q: What mechanical improvement does cold rolling bring to SPA-C?
A: Grain refinement increases yield strength by 10%, with cold bending performance d=1.5t for R≤50mm precision bending.
3. Q: How does SPA-C perform in harsh coastal environments?
A: In Cl⁻ ≥1000ppm zones, its corrosion resistance is 8x higher than ordinary cold-rolled steel.
4. Q: What aesthetic features make SPA-C suitable for art installations?
A: It offers customizable rust layer thickness (50–150μm) and natural texture evolution for industrial or retro designs.
5. Q: How does SPA-C support green building standards?
A: It's 100% recyclable, reduces coating pollution by >90%, and meets LEED/China Three-Star certifications.
