Galvanized Roofing Sheets

Galvanized roofing sheets are manufactured by coating steel sheets with a layer of zinc to protect them from corrosion. The zinc coating acts as a barrier to prevent moisture and other elements from causing rust. These sheets are usually profiled with corrugations or other patterns to enhance their structural strength and aesthetic appeal. The galvanization process can involve hot-dip galvanizing or electro-galvanizing, depending on the desired properties and application.

PRODUCT SPECIFICATION:

Product NameGalvanized Roofing Sheets / Corrugated Sheet
Thickness0.105 – 1.0mm
WidthBefore Corrugated: 762-1250mm, After Corrugated: 600-1100mm
LengthAs require
Zinc CoatingZ30 – 275g/m2
Tolerance±1%
Processing ServiceWelding, Punching, Cutting, Bending, Decoiling
StandardAISI, ASTM, BS, DIN, GB, JIS
GradeQ235B-Q355B
TechniqueCold rolled -> hot dipped galvanizing -> Color Coated -> corrugated
Normal Roof shapeWave shape, T shape
Surface StructureRegular spangle,Minimum spangle, Zero spangle, Big spangle
HRBSoft Hard (<60),Medium Hard (60-85), Full Hard (85-95)
Surface TreatmentOiled (O), Chromium (C), Phosphating (P), Spinpass Resistant to Fingerprints(AFP)
MOQ1 Ton
ApplicationVarious roofs or walls referring to the large size factory buildings, storage, exhibition halls, gymnasiums etc.

Typical Chemistry:

The typical chemical composition of galvanized roofing sheets includes:

  • Base Steel: Low carbon steel or mild steel
  • Zinc Coating: Pure zinc (Zn), sometimes with minor amounts of other elements such as aluminum (Al) to improve the coating’s adhesion and durability.

Physical Properties:

The physical properties of galvanized roofing sheets depend on the thickness of the steel and the zinc coating. Typical properties include:

  • Tensile Strength: Approximately 270-550 MPa, depending on the base steel grade
  • Yield Strength: Typically around 200-350 MPa
  • Elongation: Approximately 20-30%, depending on the base steel and its thickness
  • Corrosion Resistance: High, due to the protective zinc coating
  • Coating Thickness: Usually ranges from 20 to 275 g/m², depending on application and standard requirements
  • Sheet Thickness: Typically ranges from 0.3 mm to 3.0 mm
  • Profile Types: Various profiles like corrugated, trapezoidal, and tile profiles for enhanced strength and aesthetics

Features:

Key features of galvanized roofing sheets include:

  • Corrosion Resistance: The zinc coating provides effective protection against rust and corrosion, significantly extending the lifespan of the roofing sheets.
  • Durability: Galvanized roofing sheets are robust and can withstand harsh weather conditions, including heavy rain, snow, and high winds.
  • Lightweight: Easier to handle and install compared to other roofing materials, reducing labor and transportation costs.
  • Versatility: Suitable for a wide range of applications, including residential, commercial, industrial, and agricultural buildings.
  • Aesthetic Appeal: Available in various profiles and finishes, offering an attractive appearance for architectural applications.
  • Cost-Effective: Provides a cost-effective solution for roofing with excellent durability and low maintenance requirements.
  • Ease of Installation: Can be easily cut, bent, and fastened, allowing for quick and efficient installation.
  • Low Maintenance: The corrosion-resistant properties of the zinc coating reduce the need for frequent maintenance and repairs.
  • Energy Efficiency: Reflects sunlight, which can help reduce cooling costs in buildings.

Our Certifications

Packaging and Shipping

1. Wood pallet packing cover with water-proof paper
2. Steel pallet packing cover with water-proof paper
3. Wood box packing
4. Steel pallet packing cover with steel box
5. In bundles with steel strip no extra packing

package and shipment

Advantage

  • High Precision Dimension: The carbon steel profile has excellent processing technology good molding and easy welding. Thickened material, stable performance, and high hardness, not easy to rust.
  • Low Friction: Low dissipation factor. More durable than most ordinary domestic bearings. Lower operating costs​
  • Life Is Long: High-quality steel through strict quality inspection, quality control layer-by-layer detection, and reliable quality, long service life.
  • Customization: Drawings and samples can be processed and customized. Conventional large-scale spot, non-standard customization.
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