ASTM A308 Coated Steel Sheet,Plate

ASTM A308 Coated Steel Sheet/Plate Product Information -:- For detailed product information, please contact sales. -: ASTM A308 Coated Steel Sheet/Plate Synonyms -:- For detailed product information, please contact sales. -:

ASTM A308 Coated Steel Product Information -:- For detailed product information, please contact sales. -: ### **Product Introduction: ASTM A308 Coated Steel** **ASTM A308** is a specification for rectangular and square **zinc-coated (galvanized)** steel products, primarily used for applications requiring corrosion protection. This standard covers steel that has been hot-dip coated with zinc to provide a protective barrier against environmental corrosion, making it suitable for outdoor and corrosive environments. --- #### **1. International Standards & Classification** **Primary Standard:** **ASTM A308** - "Standard Specification for Steel, Rectangular and Square Zinc-Coated (Galvanized) for Applications Requiring Corrosion Resistance" **Coating Classification:** - **Commercial Coating**: Standard zinc coating thickness - **Heavy Coating**: Enhanced zinc coating for severe environments **International Equivalents:** - **EN 10346**: DX51D+Z - **JIS G 3302**: SGCC - **GB/T 2518**: DX51D+Z - **ISO 3575**: Commercial Quality (CQ) --- #### **2. Base Material Chemical Composition** The typical base steel composition for ASTM A308: | Element | Composition (Maximum %) | |---|---| | Carbon (C) | 0.15 | | Manganese (Mn) | 0.60 | | Phosphorus (P) | 0.035 | | Sulfur (S) | 0.040 | | Silicon (Si) | 0.30 | **Key Composition Features:** - **Low Carbon Steel**: Base material for formability and weldability - **Zinc Coating**: Primary corrosion protection mechanism - **Commercial Quality**: Balanced for general applications - **Formability Focused**: Optimized for post-coating fabrication --- #### **3. Physical & Mechanical Properties** **Base Material Mechanical Properties:** | Property | Value | |---|---| | **Tensile Strength** | 310-450 MPa (45-65 ksi) | | **Yield Strength (min.)** | 230 MPa (33 ksi) | | **Elongation (min.)** | 20% | **Coating Properties:** - **Coating Weight**: 100-550 g/m² (typical) - **Coating Adherence**: Must withstand bending without flaking - **Coating Uniformity**: Consistent coverage required - **Surface Finish**: Spangled appearance typical **Physical Properties:** - **Density**: 7.85 g/cm³ (0.284 lb/in³) - **Modulus of Elasticity**: 200 GPa (29,000 ksi) - **Thermal Conductivity**: 60.5 W/m·K (zinc coating affects overall) - **Coefficient of Thermal Expansion**: 23.0 × 10⁻⁶/°C (zinc) --- #### **4. Product Applications** **Construction and Building:** - Structural framing members - Roofing and siding supports - Building hardware components - Architectural elements **Industrial Applications:** - Equipment guards and enclosures - Support brackets and frames - Machinery components - Industrial platform components **Agricultural Equipment:** - Farm building components - Equipment structural members - Storage facility structures - Outdoor agricultural applications **Infrastructure:** - Highway signage supports - Guard rail components - Utility pole brackets - Outdoor structural applications --- #### **5. Fabrication Characteristics** **Forming Performance:** - **Good Formability**: Suitable for bending and moderate forming - **Coating Integrity**: Must maintain coating during fabrication - **Bend Radius**: Typically 1-2t depending on coating thickness - **Cutting Considerations**: Coating may affect tool life **Welding Characteristics:** - **Weldable with Care**: Requires proper ventilation due to zinc fumes - **Recommended Processes**: GMAW, GTAW with proper technique - **Precautions**: Zinc coating may cause porosity if not properly handled - **Post-Weld Treatment**: May require touch-up of damaged coating **Coating Performance:** - **Corrosion Protection**: Zinc provides sacrificial protection - **Coating Durability**: Resistant to handling and moderate impact - **Environmental Resistance**: Suitable for outdoor exposure - **Maintenance**: Generally low maintenance requirements **Quality Assurance:** - **Coating Weight Tests**: Measurement of zinc coating mass - **Adherence Testing**: Bend tests to verify coating bond - **Visual Inspection**: Surface quality and coating uniformity - **Dimensional Checks**: Compliance with specified tolerances --- ### **Technical Summary** ASTM A308 coated steel represents a cost-effective solution for applications requiring reliable corrosion protection in various environmental conditions. The hot-dip galvanized coating provides both barrier protection and sacrificial cathodic protection, significantly extending the service life of steel components exposed to corrosive environments. The specification covers commercial quality steel that has been optimized for post-coating fabrication, allowing for moderate forming and welding operations while maintaining coating integrity. The zinc coating not only provides corrosion resistance but also offers a clean, attractive appearance suitable for both industrial and architectural applications. This material is particularly valuable for outdoor structures, agricultural equipment, and industrial components where regular maintenance painting is impractical or uneconomical. The self-healing properties of zinc coating (through sacrificial protection) ensure continued corrosion resistance even at cut edges or minor coating damage areas. ASTM A308 galvanized steel has established itself as a versatile and reliable material across multiple industries, offering an optimal balance between corrosion performance, mechanical properties, fabrication characteristics, and cost-effectiveness for applications requiring durable, low-maintenance steel components in corrosive service environments. -:- For detailed product information, please contact sales. -: ASTM A308 Coated Steel Specification Dimensions Size： Diameter 20-1000 mm Length <4357 mm Size:We can customized as required Standard： Per your request or drawing We can customized as required Properties（Theoretical） Chemical Composition -:- For detailed product information, please contact sales. -: ASTM A308 Coated Steel Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A308 Coated Steel Sheet,Plate -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A308 Coated Steel Sheet,Plate -:- For detailed product information, please contact sales. -:

Packing of ASTM A308 Coated Steel Sheet/Plate -:- For detailed product information, please contact sales. -: Standard Packing: -:- For detailed product information, please contact sales. -: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and Steel Sheet/Plate drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 828 gallon liquid totes Special package is available on request. E FORUs’ is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition