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Technical Specifications
Product Overview
Metallurgical Characteristics
EDDS steel features a fine-grained ferritic microstructure with minimal carbide precipitation, achieved through controlled low-carbon chemistry and optimized processing. The ultra-low carbon content combined with aluminum killing ensures excellent formability and surface quality. The microstructure exhibits uniform grain size distribution with high r-value characteristics essential for deep drawing applications.
Heat Treatment Process
MetalZenith employs continuous annealing at 700-750°C with controlled cooling rates to achieve optimal recrystallization and grain structure. The process includes precise temperature control and protective atmosphere to prevent oxidation and ensure consistent mechanical properties throughout the coil length.
Manufacturing Process
Our EDDS production utilizes advanced hot rolling followed by cold reduction with intermediate annealing. The process includes continuous pickling, precision cold rolling with work roll grinding, and final annealing in hydrogen atmosphere. Quality control includes real-time thickness monitoring and mechanical property verification.
Specialized Quality Testing
Comprehensive testing protocols include Erichsen cupping tests for formability assessment, limiting drawing ratio evaluation, bend testing for ductility verification, and simulated atmospheric corrosion testing. Welding performance is evaluated through spot weld and seam weld testing with strength and ductility assessment.
Application Engineering Considerations
For building construction applications, EDDS provides excellent forming characteristics for architectural panels and structural components. In bridge engineering, the material offers superior fatigue resistance and weldability. Automotive applications benefit from the high r-value and excellent surface finish. Machinery manufacturing utilizes the consistent mechanical properties and forming predictability, while general engineering applications leverage the versatile processing characteristics and reliable performance.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.08 |
| Manganese (Mn) | 0.25 - 0.60 |
| Silicon (Si) | ≤ 0.03 |
| Phosphorus (P) | ≤ 0.020 |
| Sulfur (S) | ≤ 0.015 |
| Aluminum (Al) | 0.020 - 0.080 |
| Titanium (Ti) | ≤ 0.015 |
| Nitrogen (N) | ≤ 0.008 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (MPa) | 140 - 180 |
| Tensile Strength (MPa) | 270 - 350 |
| Elongation (%) | ≥ 38 |
| Impact Energy at 20°C (J) | ≥ 120 |
| Hardness (HV) | 95 - 125 |
| r-value (Lankford) | ≥ 1.8 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density (g/cm3) | 7.87 |
| 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 | Sheets, Coils, Plates, Strips |
| Thickness Range | 0.5 - 8.0mm |
| Width Range | 600 - 2100mm |
| Length Range | 1000 - 6000mm |
| Standards Compliance | ASTM A1008, EN 10130, JIS G3141 |
| Surface Finish | Cold Rolled, Annealed, Pickled |
| Edge Condition | Mill Edge, Slit Edge, Trimmed |
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Our Advantages in Processing EDDS Steel Grade
Advanced Controlled Rolling Technology
MetalZenith utilizes precision-controlled rolling with optimized temperature profiles and reduction schedules to achieve superior grain refinement and enhanced formability. Our advanced processing technology ensures consistent mechanical properties and excellent surface finish throughout the material thickness.
Comprehensive Performance Testing
Our EDDS steel undergoes extensive testing including welding performance evaluation, formability assessment using Erichsen and limiting drawing ratio tests, fatigue strength analysis, and atmospheric corrosion resistance testing to ensure optimal performance in structural applications.
Custom Processing & Technical Support
MetalZenith provides tailored processing solutions including custom heat treatment, precision cutting, and forming optimization. Our technical team offers comprehensive support for application-specific requirements, ensuring optimal performance in your structural projects.
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