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Technical Specifications
Product Overview
Metallurgical Characteristics
SA 723 is a low-alloy high-strength structural steel with a tempered martensitic or fine-grained ferritic-pearlitic microstructure. The controlled addition of nickel, chromium, and molybdenum provides enhanced hardenability, improved toughness, and superior atmospheric corrosion resistance. The optimized chemistry ensures excellent weldability while maintaining high strength levels essential for structural applications.
Heat Treatment Process
MetalZenith employs controlled austenitizing at 870-900°C followed by water quenching and tempering at 580-650°C to achieve optimal mechanical properties. Our precise temperature control and cooling rate management ensure uniform microstructure and consistent properties throughout the material cross-section, critical for structural integrity.
Manufacturing Excellence
Our advanced manufacturing process includes electric arc furnace melting, ladle refining, and continuous casting followed by controlled rolling. MetalZenith's state-of-the-art facilities ensure tight chemical composition control, minimal segregation, and superior surface quality essential for structural applications.
Specialized Quality Testing
SA 723 undergoes comprehensive testing including welding procedure qualification, bend testing for formability assessment, rotating beam fatigue testing, and accelerated atmospheric corrosion testing. Our quality assurance program includes ultrasonic inspection, magnetic particle testing, and complete mechanical property verification to ensure structural reliability.
Structural Application Engineering
For building construction, SA 723 provides excellent strength-to-weight ratios enabling lighter structural designs. In bridge engineering, its superior fatigue resistance ensures long-term durability under cyclic loading. For machinery manufacturing, the combination of high strength and good machinability facilitates complex component fabrication. In vehicle manufacturing, the steel's formability and weldability enable efficient production of chassis components while maintaining structural integrity.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.12 - 0.21 |
| Manganese (Mn) | 0.45 - 0.70 |
| Silicon (Si) | 0.15 - 0.40 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.035 |
| Nickel (Ni) | 0.40 - 0.70 |
| Chromium (Cr) | 0.40 - 0.65 |
| Molybdenum (Mo) | 0.15 - 0.25 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (MPa) | ≥ 550 |
| Tensile Strength (MPa) | 690 - 895 |
| Elongation (%) | ≥ 16 |
| Impact Energy at -29°C (J) | ≥ 20 |
| Hardness (HB) | 207 - 269 |
| Fatigue Strength (MPa) | 310 - 380 |
🔬 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) | 11.9 |
| Elastic Modulus (GPa) | 200 |
| Poisson's Ratio | 0.27 - 0.30 |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Plates, Sheets, Bars, Beams, Channels, Angles |
| Thickness Range | 8 - 150mm |
| Width Range | 1200 - 3500mm |
| Length Range | 6000 - 15000mm |
| Standards Compliance | ASTM A723, AISC, AWS D1.1 |
| Heat Treatment Condition | Quenched and Tempered or Normalized |
| Surface Finish | Hot Rolled, Pickled, Shot Blasted |
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Our Advantages in Processing SA 723 Steel
Advanced Thermomechanical Processing
MetalZenith utilizes controlled rolling and precise quenching and tempering processes with real-time temperature monitoring to achieve optimal microstructure and enhanced mechanical properties. Our advanced processing ensures consistent strength, toughness, and weldability throughout the material cross-section for superior structural performance.
Comprehensive Structural Testing
Our SA 723 steel undergoes extensive testing including welding performance evaluation, forming capability assessment, fatigue strength testing, and atmospheric corrosion resistance analysis. MetalZenith's quality assurance program ensures optimal performance in structural applications with complete documentation of all critical properties.
Custom Engineering Solutions
MetalZenith provides comprehensive custom processing services including precision cutting, forming, heat treatment optimization, and technical consultation. Our engineering team works closely with customers to develop tailored solutions for specific structural applications, ensuring optimal performance and cost-effectiveness.
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