Long-Lasting Tin Roofing Sheets | 40g Zinc Protection

Long-Lasting Tin Roofing Sheets | 40g Zinc Protection

Product Specifications

Key Features & Benefits

1. Unmatched Durability

   • Tensile Strength: Engineered with Grade DX51D steel cores, these zinc corrugated metal sheet for roofing made of high-grade alloys withstand tensile forces up to 800 MPa, resisting wind speeds of 180 mph and snow loads up to 50 psf. Ideal for coastal regions and extreme climates.
   • Bending Resistance: The trapezoidal corrugation pattern enhances rigidity, achieving bending strengths of 350–500 MPa, even under prolonged stress or thermal expansion.

2. Superior Corrosion Protection

   • The 40g/m² hot-dip zinc coating provides 4x longer rust resistance than standard galvanized sheets. Combined with a stone-chip finish, it shields against saltwater, acid rain, and UV radiation.
   • Why zinc? Zinc sacrificially corrodes before the steel substrate, forming a protective layer of zinc carbonate (Zn₅(CO₃)₂(OH)₆) that self-heals minor scratches.

3. Lightweight & Eco-Friendly

   • At 4.5–7.0 kg/m², these sheets reduce roof load by 60% compared to concrete tiles, ideal for retrofitting older structures. Made with 85% recycled steel, they align with LEED certification standards.

4. Easy Installation

   • Pre-drilled holes and interlocking edges simplify DIY installation. Use sheet metal roofing screws (recommended: hex-head with EPDM washers) to prevent water ingress.

Technical Insights

Identification & Traceability

• Laser Marking: Each sheet is etched with a unique code (e.g., ZN40-DX51D) for batch tracking, complying with ASTM E384 and ISO 9001 standards.
• Coating Verification: X-ray fluorescence (XRF) testing confirms zinc coating density (40g/m² ±5%) and alloy composition (0.15% C, 0.6% Si).

Weight Calculation Formula

$$\text{Weight (kg)}=\text{Thickness (mm)}\times \text{Width (m)}\times \text{Length (m)}\times 7.85(\text{steel density})$$

Example: A 0.6 mm × 1.2 m × 2.4 m sheet weighs $0.6\times 1.2\times 2.4\times 7.85=13.6\text{kg}$.

Why Stainless Steel May Corrode
While stainless steel is highly resistant, corrosion can occur under specific conditions:

• Chloride Exposure: Coastal saltwater or de-icing agents penetrate the chromium oxide layer, causing pitting.
• Mechanical Damage: Scratches during installation expose the iron substrate to oxidation.
• Low Oxygen Environments: Stagnant water inhibits oxide layer regeneration, accelerating rust.

Why Choose Our Roofing Solutions?

1. 40g Zinc Shield: Unlike competitors’ 20–30g coatings, our 40g/m² zinc layer ensures decades of rust-free performance.
2. Customization: Tailor dimensions, colors (15+ options), and profiles (arched/plain) to match architectural needs.
3. Global Compliance: Meets ASTM, CE, and SGS standards for fire resistance (Class A1) and load capacity.
4. Sustainability: 100% recyclable materials and energy-efficient production reduce carbon footprint by 30%.