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Technical Specifications
Product Overview
Metallurgical Characteristics
Q235 is a low-carbon structural steel with a predominantly ferritic-pearlitic microstructure. The controlled carbon content ensures excellent weldability while maintaining adequate strength for structural applications. The fine-grained structure achieved through controlled rolling provides optimal balance between strength, ductility, and toughness for general construction use.
Heat Treatment Process
MetalZenith employs controlled hot rolling at temperatures between 1050-1200°C followed by controlled cooling to achieve optimal mechanical properties. Optional normalization at 860-920°C can be applied for enhanced grain refinement and improved impact toughness when specified for critical structural applications.
Manufacturing Process
Our Q235 production utilizes electric arc furnace steelmaking with secondary refining for precise chemistry control. Advanced continuous casting ensures homogeneous structure, while our multi-stand hot rolling mills with computerized process control deliver consistent mechanical properties and dimensional accuracy throughout the entire coil or plate.
Specialized Quality Testing
MetalZenith conducts comprehensive testing protocols specific to structural applications including weldability testing per AWS D1.1, bend testing for formability assessment, rotating beam fatigue testing for cyclic loading performance, and salt spray testing for atmospheric corrosion resistance evaluation, ensuring optimal performance in diverse structural environments.
Application Engineering Considerations
For building construction, Q235's excellent weldability enables efficient fabrication of complex structural joints. In bridge engineering, the steel's fatigue resistance and atmospheric corrosion properties ensure long-term durability. For machinery manufacturing, the material's formability allows for cost-effective production of frames and housings. In vehicle manufacturing, Q235 provides optimal strength-to-weight ratio for chassis components, while its general engineering versatility makes it ideal for diverse fabrication applications requiring reliable mechanical properties and processing characteristics.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.22 |
| Manganese (Mn) | 0.30 - 0.70 |
| Silicon (Si) | ≤ 0.35 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.050 |
| Iron (Fe) | Balance |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (MPa) | ≥ 235 |
| Tensile Strength (MPa) | 370 - 500 |
| Elongation (%) | ≥ 26 |
| Impact Energy at 20°C (J) | ≥ 27 |
| Hardness (HB) | 120 - 160 |
| Fatigue Strength (MPa) | 180 - 220 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density (g/cm3) | 7.85 |
| Melting Point (°C) | 1510 - 1540 |
| Thermal Conductivity (W/m·K) | 49.8 |
| Thermal Expansion (×10??/K) | 12.0 |
| Elastic Modulus (GPa) | 200 - 210 |
| Poisson's Ratio | 0.27 - 0.30 |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Plates, Sheets, Bars, Angles, Channels, Beams |
| Thickness Range | 1.5 - 200mm |
| Width Range | 600 - 3500mm |
| Length Range | 2000 - 12000mm |
| Standards Compliance | GB/T 700, ASTM A36, JIS G3101 SS400 |
| Surface Condition | Hot Rolled, Pickled, Shot Blasted |
| Delivery Condition | Hot Rolled, Normalized (Optional) |
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Our Advantages in Processing Q235 Steel
Controlled Hot Rolling Technology
MetalZenith utilizes advanced controlled hot rolling with precise temperature monitoring and cooling rate control to achieve optimal grain refinement and mechanical properties. Our state-of-the-art rolling mills ensure consistent thickness tolerance and superior surface finish, enhancing the steel's formability and weldability for structural applications.
Comprehensive Structural Testing
Our Q235 steel undergoes extensive testing protocols including weldability assessment per AWS standards, bend testing for formability evaluation, fatigue strength testing under cyclic loading, and accelerated atmospheric corrosion testing. This comprehensive testing ensures optimal performance in demanding structural environments.
Custom Fabrication Services
MetalZenith provides complete custom processing services including precision cutting, forming, welding preparation, and surface treatment. Our technical team offers engineering support for structural design optimization, ensuring Q235 steel specifications meet specific project requirements for construction and manufacturing applications.
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