Heavy-Duty Tin Roofing Sheets | ASTM DX51D Compliance

Product Overview

Our roof sheet metal is engineered for industrial and commercial roofing applications, combining unmatched durability, corrosion resistance, and structural integrity. Certified to ASTM DX51D, EN 10346, and ISO 3575 standards, these steel roof sheets are designed for high-load environments such as factories, warehouses, and agricultural buildings. With a galvanized zinc coating (Z275-Z600) and optional stone-coated finish, they offer superior weather resistance and a lifespan exceeding 30 years.

Technical Specifications

Key Attributes

1. Tensile & Bend Strength

Our metal roof sheet achieves a tensile strength of 270–500 MPa, validated through third-party testing. The bend strength is optimized for wind loads up to 160 km/h, with corrugated profiles enhancing rigidity by 40% compared to flat sheets. Hydrostatic testing at 1.5× working pressure ensures resistance to deformation under snow loads (up to 1.5 kN/m²).

2. Identification & Marking

Each sheet is embossed with:

• Material Grade (e.g., ASTM DX51D)
• Coating Type (Z275-Z600 for galvanized; AZ150 for Galvalume®)
• Batch Number (traceable to mill certificates)
• Certification Marks (ASTM, ISO, CE).

3. Weight Calculation

Weight (kg/m²) = $(Thickness\times 7.85)+CoatingWeight$ × Sheet Width.
Example: A 0.4mm galvanized sheet (Z275 coating) weighs 3.14 kg/m². For steel roof sheets with stone coating, add 0.8 kg/m².

4. Corrosion Resistance & Anti-Rust Mechanism

While the zinc/aluminum coating provides robust rust protection, localized corrosion may occur due to:

• Mechanical Damage: Scratches exposing the steel substrate require touch-up with zinc-rich paint.
• Galvanic Corrosion: Avoid contact with copper or untreated carbon steel in humid environments.
• Chloride Exposure: Coastal areas necessitate higher zinc coatings (Z450+).
  The self-healing property of zinc ensures minor scratches re-passivate over time.

Manufacturing Process

1. Material Selection: ASTM DX51D steel coils sourced from ISO 9001-certified mills.
2. Galvanizing: Continuous hot-dip process (435–455°C) with zinc/aluminum alloy coating.
3. Profiling: Roll-forming into corrugated/embossed patterns for enhanced rigidity.
4. Stone Coating (optional): Acrylic-bonded natural granules applied at 200°C for UV resistance.
5. Quality Assurance: Eddy-current coating thickness checks and salt-spray testing (1,000+ hours).

Applications

• Industrial Roofing: Factories, warehouses, and hangars requiring high load-bearing capacity.
• Agricultural Buildings: Barns, poultry farms, and storage sheds resistant to ammonia corrosion.
• Residential Use: Aesthetic stone-coated variants for villas and log cabins.
• Solar Panel Mounting: Structural compatibility with photovoltaic systems.

Why Choose Us?
As a leader in metal roof sheet manufacturing, we guarantee:

1. Certified Durability: ASTM DX51D compliance with 30+ years of weather resistance.
2. Custom Solutions: Tailored lengths (1M–12M), profiles (corrugated, tile-effect), and coatings.
3. Global Standards: CE, SGS, and ISO 3575 certifications for international projects.
4. Sustainability: 100% recyclable materials with ISO 14001-certified production.
5. Cost Efficiency: 15% lower lifecycle costs vs. traditional asphalt shingles.