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Technical Specifications
Product Overview
Metallurgical Characteristics
Q345 steel features a fine-grained ferritic-pearlitic microstructure achieved through controlled rolling and optimized chemical composition. The balanced carbon and manganese content, combined with microalloying elements, provides excellent strength-to-weight ratio and superior weldability essential for structural applications.
Heat Treatment Process
MetalZenith employs controlled rolling at temperatures between 850-950°C followed by controlled cooling to achieve optimal mechanical properties. Our thermomechanical controlled processing (TMCP) ensures grain refinement and enhanced toughness while maintaining excellent formability for structural fabrication.
Manufacturing Process Excellence
Our Q345 production utilizes advanced electric arc furnace technology with precise chemical composition control, followed by continuous casting and controlled rolling. Real-time monitoring systems ensure consistent quality and mechanical properties throughout the production process, meeting stringent structural steel requirements.
Structural Performance Testing
MetalZenith conducts comprehensive testing protocols specific to structural applications including welding performance evaluation using standard procedures, cold forming capability assessment, fatigue strength testing under cyclic loading conditions, and atmospheric corrosion resistance testing to ensure long-term durability in construction environments.
Application Engineering Considerations
For building construction and high-rise applications, Q345 provides optimal strength-to-weight ratios and excellent weldability for complex joint configurations. In bridge engineering, the steel's superior fatigue resistance and atmospheric corrosion properties ensure long-term structural integrity. For machinery manufacturing and automotive applications, the excellent formability and consistent mechanical properties enable efficient fabrication of complex structural components.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.20 |
| Manganese (Mn) | 1.00 - 1.60 |
| Silicon (Si) | 0.20 - 0.55 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.035 |
| Chromium (Cr) | ≤ 0.30 |
| Nickel (Ni) | ≤ 0.50 |
| Copper (Cu) | ≤ 0.30 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (MPa) | ≥ 345 |
| Tensile Strength (MPa) | 470 - 630 |
| Elongation (%) | ≥ 21 |
| Impact Energy at 20°C (J) | ≥ 34 |
| Hardness (HB) | ≤ 229 |
| Fatigue Strength (MPa) | 160 - 180 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density (g/cm3) | 7.85 |
| Melting Point (°C) | 1500 - 1540 |
| Thermal Conductivity (W/m·K) | 51.9 |
| Thermal Expansion (×10??/K) | 12.5 |
| Elastic Modulus (GPa) | 206 |
| Poisson's Ratio | 0.26 |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Plates, Sheets, Beams, Channels, Angles, Bars |
| Thickness Range | 3 - 150mm |
| Width Range | 1000 - 4200mm |
| Length Range | 6000 - 18000mm |
| Standards Compliance | GB/T 1591, ASTM A572, EN 10025-2 |
| Heat Treatment Condition | Hot Rolled, Normalized, TMCP |
| Surface Finish | Mill Scale, Shot Blasted, Pickled |
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Our Advantages in Processing Q345 Steel
Advanced Controlled Rolling Technology
MetalZenith utilizes state-of-the-art controlled rolling processes with precise temperature control and optimized reduction schedules to achieve superior grain refinement in Q345 steel. Our advanced thermomechanical processing ensures consistent mechanical properties and enhanced structural performance throughout the material cross-section.
Comprehensive Structural Performance Testing
Our Q345 steel undergoes extensive testing protocols including welding performance evaluation, cold forming capability assessment, fatigue strength testing under cyclic loading, and atmospheric corrosion resistance testing. This comprehensive testing ensures optimal performance in demanding structural applications.
Custom Fabrication and Engineering Support
MetalZenith provides complete custom processing services including precision cutting, forming, welding preparation, and surface treatment. Our technical team offers comprehensive engineering support for structural design optimization and application-specific material selection to meet unique project requirements.
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