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Technical Specifications
Product Overview
Metallurgical Characteristics
SA-508 is a low-alloy structural steel with a tempered martensitic microstructure achieved through controlled quenching and tempering processes. The addition of nickel, chromium, and molybdenum provides enhanced hardenability, improved toughness, and superior strength retention at elevated temperatures. The fine-grained microstructure ensures excellent through-thickness properties and superior fatigue resistance essential for structural applications.
Heat Treatment Process
MetalZenith employs controlled austenitizing at 870-900°C followed by water quenching and tempering at 620-660°C. Our precise temperature control and cooling rate management ensure optimal microstructural development and property uniformity. The tempering process is carefully controlled to achieve the desired strength-toughness balance while maintaining excellent dimensional stability.
Manufacturing Excellence
Our SA-508 production utilizes electric arc furnace melting with ladle refining and vacuum degassing to achieve exceptional cleanliness. Controlled forging processes with optimized reduction ratios ensure proper grain flow and eliminate internal defects. MetalZenith's advanced heat treatment facilities provide uniform heating and controlled cooling to guarantee consistent mechanical properties throughout large structural components.
Specialized Quality Testing
Our comprehensive testing program includes welding performance evaluation using standard procedures, forming capability assessment through bend testing, fatigue strength determination via rotating beam testing, and atmospheric corrosion resistance evaluation in controlled environments. Each heat undergoes complete chemical analysis, mechanical property verification, and non-destructive testing to ensure structural integrity.
Application Engineering
For building construction applications, SA-508 provides exceptional load-bearing capacity and seismic resistance. In bridge engineering, its superior fatigue properties ensure long-term structural integrity under cyclic loading. For machinery manufacturing, the steel offers excellent machinability and weldability for complex structural assemblies. In vehicle manufacturing, SA-508 delivers optimal strength-to-weight ratios for chassis components. General engineering applications benefit from its versatile properties and reliable performance across diverse operating conditions.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.15 - 0.25 |
| Manganese (Mn) | 1.20 - 1.50 |
| Silicon (Si) | 0.15 - 0.40 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.025 |
| Nickel (Ni) | 0.40 - 1.00 |
| Chromium (Cr) | 0.25 - 0.45 |
| Molybdenum (Mo) | 0.45 - 0.60 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (MPa) | ≥ 345 |
| Tensile Strength (MPa) | 550 - 725 |
| Elongation (%) | ≥ 18 |
| Impact Energy at 10°C (J) | ≥ 54 |
| Hardness (HB) | 163 - 217 |
| Fatigue Strength (MPa) | 275 - 350 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density (g/cm3) | 7.85 |
| Melting Point (°C) | 1480 - 1520 |
| Thermal Conductivity (W/m·K) | 42.7 |
| Thermal Expansion (×10??/K) | 12.3 |
| Elastic Modulus (GPa) | 200 |
| Poisson's Ratio | 0.27 - 0.30 |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Plates, Forgings, Bars, Structural Shapes |
| Thickness Range | 25 - 200mm |
| Width Range | 1500 - 4500mm |
| Length Range | 6000 - 15000mm |
| Standards Compliance | ASTM A508, ASME SA-508, EN 10028 |
| Heat Treatment Condition | Quenched and Tempered |
| Surface Finish | Hot Rolled, Machined, or Shot Blasted |
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Our Advantages in Processing SA-508 Steel
Advanced Vacuum Degassing Technology
MetalZenith utilizes advanced vacuum degassing and controlled atmosphere melting to produce SA-508 steel with exceptional cleanliness and reduced inclusion content. Our precise temperature control during forging and heat treatment ensures optimal grain structure and enhanced mechanical properties throughout the material cross-section.
Comprehensive Structural Testing
Our SA-508 steel undergoes extensive testing protocols including welding performance evaluation, forming capability assessment, fatigue strength testing, and atmospheric corrosion resistance analysis. MetalZenith's advanced testing facilities ensure superior performance in structural applications with comprehensive documentation for critical projects.
Custom Structural Solutions
MetalZenith provides tailored SA-508 steel solutions with custom heat treatment schedules, precision machining, and specialized forming services. Our engineering team offers technical support for structural design optimization, welding procedure development, and application-specific property enhancement to meet unique project requirements.
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