Galvanized Steel Sheet — Roofing

Description

1. Product Overview
This product is a hot-dip galvanized steel sheet, coated with a uniform zinc layer to prevent rust in aggressive environments. It is primarily used for industrial roofing, wall cladding, and prefabricated building systems. The key value proposition is its superior durability-to-weight ratio and low maintenance requirement over 20+ years. Strategically, it is essential for cost-sensitive, high-volume construction markets where material failure directly impacts project ROI and safety compliance.

2. Key Specifications & Technical Characteristics

• Material composition: Low-carbon steel (ASTM A653 / JIS G3302) with Zn coating (min. Z180–Z275 grade)

• Coating purity: ≥99.8% zinc, lead-free, spangle control available (regular or minimal)

• Physical characteristics: Sheet thickness 0.12mm–1.5mm; width 600mm–1,250mm; flat or corrugated profile; silver-gray metallic finish

• Packaging options: Standard export seaworthy packing — moisture-proof paper + PVC film + galvanized steel strapping on wooden pallets

• Shelf life: 12 months in original, dry, unopened packaging (no white rust formation under recommended storage)

3. Core Industrial Applications

• Primary industries: Commercial construction, agricultural buildings, logistics warehousing, and prefab steel structure manufacturers

• Specific use cases: Roofing sheets for factories, grain silo covers, livestock shed roofing, and modular container roofs

• Performance advantage: Superior uniform coating adhesion (bend test compliant) prevents flaking during roll-forming, reducing on-site waste by ~15% versus entry-level imports

• Efficiency gain: High flatness and gauge accuracy enable 30% faster installation using automated roofing lines, lowering labor costs per square meter

4. Competitive Advantages

• Quality consistency: ISO 9001-certified mills with real-time coating thickness monitoring (every 5 tons)

• Supply reliability: 50,000 MT monthly capacity; 98% on-time delivery rate to 40+ countries

• Logistics capability: Ex-work, FOB, or CIF terms; 24/7 coordination with tier-1 freight forwarders

• Price competitiveness: Direct mill allocation removes 2–3 intermediary margins; volume-based tier pricing

• Sustainability: Fully recyclable material; zinc coating extends steel life by 3x vs. uncoated; RoHS and REACH compliant

• Technical support: Mill certificates (EN 10204 Type 3.1), corrosion test reports, and roll-forming guidelines available online

5. Commercial & Supply Information

• Minimum order quantity (MOQ): Bulk — 20 metric tons (MT) per SKU

• Loading capacity: 22–25 MT per 20-foot container (depending on sheet profile)