Fireproof Zn-Al-Mg275 Coated C-Channel & Z-Channel Steel with High Durability Polyester Finish for Steel Structure Building
Price:
Negotiable
MOQ:
Negotiable
Delivery Time:
Negotiable
Brand:
GNEE
Product Description
Fireproof Perforated C-Channel & Z-Channel Steel for Steel Structure Building
Zn-Al-Mg275 Coated Steel Overview
Zn-Al-Mg275 HDP Steel combines triple-layer Zn-(2-11%)Al-(1.5-3%)Mg alloy coating (275g/m²) with 35μm High Durability Polyester (HDP) finish. Engineered for maximum solar reflectance and corrosion resistance in photovoltaic systems and industrial architecture.
Key Features
Superior Solar Reflectivity
- Technology: 86.5% SRI (ASTM E1980) via light-reflective ceramic pigments
- Energy Impact: Reduces rooftop temperature by 15-20°C, cutting cooling costs by 30%+
Extreme Corrosion Resistance
- Coating Innovation: Zn-Al-Mg275 alloy + HDP topcoat forms self-healing barrier
- Proven Durability: 12,000 hours salt spray test (ISO 9227) - survives C4 marine environments
Self-Cleaning Hydrophobic Surface
- Functional Design: 25° water contact angle prevents dust accumulation
- Low Maintenance: Maintains >85% reflectivity after 10 years (vs. 60% for standard panels)
Structural Strength & Lightweight
- Material Advantage: Dx51d base (550MPa yield) at 1.0mm thickness - 30% lighter than concrete
- Installation Efficiency: Enables 100m+ span roofing without supports
C&Z Channel Steel Specification Sheet
| Standard | ASTM, JIS, DIN EN, GB etc. |
| Material Grade | Q235B, Q345B, S235JR/S235/S355JR/S355/SS440/SM400A/SM400B |
| Thickness | 1.0-3.0 mm or as customer's request |
| Width | C80 to C300, Z100 to Z300 or as customer's request |
| Length | As customer's request, Less than 5.85m for 20ft Container, Less than 11.85m for 40ft Container |
| Materials Galvanized | Zn 80g to Zn 275, if more, need customized |
| Technique | Hot rolled/Cold rolled + Galvanized |
| Surface treatment | Black, Galvanized, coated, painted or as your request |
| Packing | 1. Big OD: in bulk 2. Small OD: packed by steel strips 3. Standard export package or as required |
| Advantage | Small MOQ + Superior quality + Competitive price + Fast delivery |
| Application | Industry, Construction, Decoration, Shipbuilding, Bridging, Automobile chassis, etc. |
Technical Specifications
| Model NO. | DX51D+ZM275 |
| Certification | ISO, RoHS, IBR |
| Surface Treatment | Coated |
| Technique | Cold Rolled |
| Application | Construction, Household, Automobile, Photovoltaic |
| Edge | Slit edge |
| Stock | Stock |
| Thickness | 0.15mm-6mm |
| Width | 5mm-1600mm |
| Coil Weight | 3-8mt |
| Coil ID | 508/610mm |
| Coating | 40-450G/M2 |
| Delivery Time | 3-15 days |
| Acceptable quotation terms | FOB / CIF / CFR / EXW |
| Acceptable payment terms | TT / LC |
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Gnee Steel (tianjin) Co., Ltd.
Location
FLAT/RM 1512 15/F LUCKY CENTRE NO.165-171 WAN CHAI ROAD WAN CHAI HK
Contact Person
Kelly Zhang