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Technical Specifications
Product Overview
Metallurgical Characteristics
SAPH440 is a high-strength low-alloy (HSLA) structural steel with a fine-grained ferritic-pearlitic microstructure. The controlled addition of microalloying elements such as titanium and niobium promotes grain refinement and precipitation strengthening, resulting in enhanced yield strength while maintaining excellent formability and weldability characteristics essential for structural applications.
Heat Treatment Process
MetalZenith employs controlled rolling at temperatures between 850-950°C followed by accelerated cooling to achieve optimal mechanical properties. The thermomechanical processing includes precise temperature control during rolling and controlled cooling rates to develop the desired microstructure for superior strength and formability balance.
Manufacturing Process Excellence
MetalZenith's advanced production process incorporates continuous casting, controlled rolling mills with computerized process control, and inline cooling systems. Our state-of-the-art facilities ensure consistent chemical composition, uniform mechanical properties, and excellent surface quality throughout the entire coil length, meeting the stringent requirements of structural applications.
Specialized Quality Testing
Comprehensive testing protocols include weldability assessment through crack susceptibility tests, formability evaluation using limiting dome height (LDH) testing, fatigue strength analysis under cyclic loading conditions, and atmospheric corrosion resistance testing in various environmental conditions. These specialized tests ensure optimal performance in demanding structural applications.
Application-Specific Technical Considerations
For building and construction applications, SAPH440 offers excellent seismic resistance and structural integrity. In bridge engineering, the steel provides superior fatigue resistance and long-term durability. For machinery manufacturing, the material ensures reliable performance under dynamic loading conditions. In vehicle manufacturing, SAPH440 delivers optimal crash performance and weight reduction benefits. The steel's versatility makes it ideal for general engineering applications requiring high strength-to-weight ratios and excellent fabrication characteristics.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.21 |
| Manganese (Mn) | ≤ 1.50 |
| Silicon (Si) | ≤ 0.30 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.025 |
| Aluminum (Al) | ≥ 0.015 |
| Titanium (Ti) | ≤ 0.15 |
| Niobium (Nb) | ≤ 0.09 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (MPa) | ≥ 440 |
| Tensile Strength (MPa) | 490 - 620 |
| Elongation (%) | ≥ 21 |
| Impact Energy at 0°C (J) | ≥ 27 |
| Hardness (HRB) | 85 - 95 |
| Bend Test (180°) | No Cracking |
🔬 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) | 210 |
| Poisson's Ratio | 0.30 |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Hot-rolled Sheets, Plates, Coils, Cut-to-length |
| Thickness Range | 1.2 - 25.0mm |
| Width Range | 600 - 2100mm |
| Length Range | 2000 - 12000mm |
| Standards Compliance | JIS G3113, ASTM A1011, EN 10149-2 |
| Surface Condition | Hot-rolled, Pickled, Oiled |
| Edge Condition | Mill Edge, Slit Edge, Trimmed Edge |
| Delivery Condition | Hot-rolled and Normalized |
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Our Advantages in Processing SAPH440
Advanced Thermomechanical Processing
MetalZenith employs controlled rolling with precise temperature control and accelerated cooling technology to achieve optimal grain refinement and enhanced mechanical properties. Our advanced processing ensures consistent strength and excellent formability throughout the material thickness, critical for complex structural applications.
Comprehensive Structural Testing
MetalZenith conducts extensive testing including weldability assessment, formability evaluation, fatigue strength testing, and atmospheric corrosion resistance analysis. Our rigorous quality control ensures SAPH440 meets the demanding requirements of structural applications with superior performance in welding and forming operations.
Custom Processing & Technical Support
MetalZenith offers comprehensive custom processing services including precision cutting, forming, and heat treatment optimization. Our technical team provides expert consultation on material selection, processing parameters, and application-specific solutions to maximize performance in structural engineering projects.
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