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Technical Specifications
Product Overview
Metallurgical Characteristics
SGCC features a low-carbon ferritic microstructure with fine grain size optimized for excellent formability and weldability. The hot-dip galvanized coating consists of a zinc-iron alloy layer at the interface and pure zinc outer layer, providing multi-layer corrosion protection. The controlled chemistry ensures optimal coating adhesion and prevents zinc spangle formation for superior surface quality.
Heat Treatment Process
MetalZenith employs continuous annealing at 650-750°C followed by controlled cooling to achieve optimal mechanical properties. The galvanizing process involves surface preparation, flux treatment, and immersion in molten zinc bath at 450-460°C with precise withdrawal speed control to achieve uniform coating thickness and excellent surface finish.
Manufacturing Process
Our state-of-the-art production line features continuous hot-dip galvanizing with advanced process control systems monitoring zinc bath composition, temperature, and coating thickness in real-time. The process includes degreasing, annealing, galvanizing, and post-treatment cooling with automated quality inspection systems ensuring consistent product quality.
Structural Quality Testing
MetalZenith conducts comprehensive testing including welding performance evaluation using standard procedures, forming limit analysis with Erichsen cupping tests, fatigue strength testing under cyclic loading conditions, and accelerated atmospheric corrosion testing in salt spray chambers. Additional tests include coating adhesion, bend testing, and impact resistance verification.
Application Engineering
For building construction, SGCC provides excellent corrosion resistance for roofing, siding, and structural framing with 15-20 year service life. In bridge engineering, the material offers superior weathering resistance for guardrails and secondary structures. Automotive applications benefit from excellent formability for body panels and chassis components. Machinery manufacturing utilizes SGCC for equipment housings and frames requiring corrosion protection, while general engineering applications leverage its versatility for diverse fabrication requirements.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.12 |
| Manganese (Mn) | ≤ 0.60 |
| Silicon (Si) | ≤ 0.50 |
| Phosphorus (P) | ≤ 0.100 |
| Sulfur (S) | ≤ 0.035 |
| Aluminum (Al) | ≥ 0.020 |
| Zinc Coating (Zn) | 275 g/m2 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (MPa) | ≥ 205 |
| Tensile Strength (MPa) | 270 - 500 |
| Elongation (%) | ≥ 20 |
| Impact Energy at 0°C (J) | ≥ 27 |
| Hardness (HRB) | 55 - 85 |
| Fatigue Strength (MPa) | ≥ 180 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density (g/cm3) | 7.85 |
| Melting Point (°C) | 1510 - 1540 |
| Thermal Conductivity (W/m·K) | 50.2 |
| Thermal Expansion (×10??/K) | 11.8 |
| Elastic Modulus (GPa) | 200 |
| Coating Thickness (μm) | 20 - 25 |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Sheets, Coils, Plates, Strips, Cut-to-Length |
| Thickness Range | 0.4 - 6.0mm |
| Width Range | 600 - 1500mm |
| Length Range | 1000 - 6000mm |
| Standards Compliance | JIS G3302, ASTM A653, EN 10346 |
| Surface Treatment | Hot-Dip Galvanized Z275 |
| Edge Condition | Mill Edge, Slit Edge, Trimmed Edge |
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Our Advantages in Processing SGCC Steel
Advanced Hot-Dip Galvanizing Process
MetalZenith employs continuous hot-dip galvanizing with precise zinc bath temperature control at 450-460°C and optimized alloy composition to achieve uniform coating thickness and superior adhesion. Our advanced process ensures consistent Z275 coating grade with excellent surface finish and enhanced corrosion protection.
Comprehensive Structural Testing
MetalZenith conducts extensive testing including welding performance evaluation, forming limit analysis, fatigue strength testing up to 2 million cycles, and accelerated atmospheric corrosion testing. Our quality assurance ensures optimal performance in structural applications with verified bendability and impact resistance.
Custom Fabrication Services
MetalZenith provides comprehensive custom processing including precision cutting, forming, welding, and surface treatment services. Our technical team offers engineering support for structural design optimization and application-specific solutions for building, bridge, and machinery manufacturing requirements.
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