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Technical Specifications
Product Overview
Metallurgical Characteristics
Prestressing steel features a fine pearlitic microstructure achieved through controlled patenting and cold drawing processes. The high carbon content combined with precise microalloying elements provides exceptional tensile strength while maintaining adequate ductility. The microstructure consists of fine pearlite lamellae with optimized cementite distribution, ensuring superior fatigue resistance and stress relaxation properties essential for prestressed concrete applications.
Heat Treatment Process
MetalZenith employs controlled patenting at 950-1000°C followed by isothermal transformation at 500-550°C to achieve optimal pearlitic structure. Subsequent cold drawing with precise reduction ratios enhances strength while maintaining controlled stress relaxation characteristics. Our proprietary heat treatment ensures consistent mechanical properties and dimensional stability.
Manufacturing Process Excellence
Our advanced manufacturing process includes continuous casting, controlled rolling, precision patenting, and multi-stage cold drawing with intermediate stress relief treatments. Real-time monitoring of drawing forces and dimensional control ensures consistent quality. Post-drawing stress relief treatments optimize residual stress distribution for enhanced performance in structural applications.
Specialized Quality Testing
MetalZenith conducts comprehensive testing including welding performance evaluation using standard welding procedures, forming capability assessment through bend tests, fatigue strength testing under variable amplitude loading, and atmospheric corrosion resistance testing in salt spray environments. Stress relaxation testing at elevated temperatures ensures long-term performance reliability in prestressed concrete structures.
Structural Application Considerations
For building structures and bridge engineering, our prestressing steel provides exceptional anchorage performance and long-term stress retention. In mechanical manufacturing applications, the high strength-to-weight ratio enables compact designs. For vehicle manufacturing, the fatigue resistance ensures durability under dynamic loading. General engineering applications benefit from the predictable stress-strain behavior and excellent dimensional stability under sustained loading conditions.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.75 - 0.85 |
| Manganese (Mn) | 0.60 - 0.90 |
| Silicon (Si) | 0.15 - 0.30 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.025 |
| Chromium (Cr) | 0.10 - 0.30 |
| Vanadium (V) | 0.05 - 0.15 |
| Aluminum (Al) | ≥ 0.015 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (MPa) | ≥ 1570 |
| Tensile Strength (MPa) | 1860 - 2060 |
| Elongation (%) | ≥ 3.5 |
| Impact Energy at 20°C (J) | ≥ 20 |
| Hardness (HB) | 380 - 420 |
| Fatigue Strength (MPa) | ≥ 200 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density (g/cm3) | 7.85 |
| Melting Point (°C) | 1480 - 1520 |
| Thermal Conductivity (W/m·K) | 42.5 |
| Thermal Expansion (×10??/K) | 12.5 |
| Elastic Modulus (GPa) | 205 |
| Poisson's Ratio | 0.30 |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Strands, Wires, Bars, Rods, Custom Profiles |
| Diameter Range | 4.0 - 15.2mm |
| Length Range | Up to 6000m (coiled) |
| Surface Condition | Bright, Galvanized, Epoxy Coated |
| Standards Compliance | ASTM A416, EN 10138, JIS G3536 |
| Heat Treatment Condition | Patented and Drawn |
| Stress Relaxation | Class 1 (≤ 2.5% at 1000h) |
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Our Advantages in Processing Prestressing Steel
Advanced Thermomechanical Processing
MetalZenith employs controlled rolling and precision heat treatment processes with real-time temperature monitoring to achieve optimal microstructure and enhanced mechanical properties. Our advanced processing ensures consistent high tensile strength and fatigue resistance throughout the material cross-section, essential for prestressing applications.
Comprehensive Structural Testing
Our prestressing steel undergoes rigorous testing protocols including welding performance evaluation, forming capability assessment, fatigue strength testing up to 2 million cycles, and atmospheric corrosion resistance testing. These specialized tests ensure optimal performance in structural applications requiring long-term reliability.
Custom Engineering Solutions
MetalZenith provides comprehensive technical support and custom processing services tailored to specific structural requirements. Our engineering team offers application-specific heat treatment, precision cutting, and surface treatment options to optimize performance for building structures, bridge engineering, and mechanical manufacturing applications.
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