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Technical Specifications
Product Overview
Metallurgical Characteristics
HSLA 50 features a fine-grained ferritic-pearlitic microstructure with controlled precipitation of microalloying carbides and nitrides. The strategic addition of niobium, vanadium, and titanium promotes grain refinement through precipitation strengthening and grain boundary pinning, resulting in enhanced yield strength while maintaining excellent ductility and toughness.
Heat Treatment Process
MetalZenith employs thermomechanical controlled processing (TMCP) with controlled rolling temperatures between 850-950°C followed by accelerated cooling. This process optimizes austenite conditioning and promotes fine ferrite grain formation with uniform precipitation distribution, achieving superior strength-toughness balance.
Advanced Manufacturing Process
Our state-of-the-art production facility utilizes computer-controlled rolling mills with precise temperature monitoring and cooling systems. The manufacturing process includes continuous casting, reheating furnace treatment, multi-pass controlled rolling, and programmed cooling to ensure consistent mechanical properties and microstructural uniformity throughout the material thickness.
Specialized Quality Testing
MetalZenith conducts comprehensive testing protocols specific to high-strength steels including Erichsen cupping tests for formability assessment, controlled thermal severity (CTS) testing for weldability evaluation, hydrogen-induced cracking (HIC) resistance testing using NACE TM0284 standards, and delayed fracture testing under sustained loading conditions to ensure long-term structural integrity.
Application-Specific Considerations
For automotive applications, HSLA 50 provides excellent crash energy absorption and weight reduction capabilities. In construction and bridge engineering, the steel offers superior fatigue resistance and seismic performance. For pressure vessels and lifting equipment, the material demonstrates exceptional resistance to stress corrosion cracking and maintains structural integrity under cyclic loading conditions, making it ideal for critical safety applications.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.23 |
| Manganese (Mn) | 1.35 max |
| Silicon (Si) | 0.40 max |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.030 |
| Niobium (Nb) | 0.005 - 0.050 |
| Vanadium (V) | 0.01 - 0.15 |
| Titanium (Ti) | 0.006 - 0.040 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (MPa) | ≥ 345 |
| Tensile Strength (MPa) | 450 - 620 |
| Elongation (%) | ≥ 18 |
| Impact Energy at 0°C (J) | ≥ 27 |
| Fatigue Strength (MPa) | 160 - 180 |
| Hardness (HB) | 140 - 190 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density (g/cm3) | 7.85 |
| Melting Point (°C) | 1510 - 1540 |
| Thermal Conductivity (W/m·K) | 49.8 |
| Thermal Expansion (×10??/K) | 11.7 |
| Elastic Modulus (GPa) | 200 |
| Poisson's Ratio | 0.27 - 0.30 |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Plates, Sheets, Coils, Bars, Structural Shapes |
| Thickness Range | 1.5 - 100mm |
| Width Range | 1000 - 3200mm |
| Length Range | 6000 - 15000mm |
| Standards Compliance | ASTM A572 Grade 50, ASTM A709 Grade 50 |
| Heat Treatment Condition | Hot Rolled, TMCP, Normalized |
| Surface Finish | Mill Scale, Pickled, Shot Blasted |
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Our Advantages in Processing HSLA 50 Steel
Advanced Thermomechanical Processing
MetalZenith employs precision-controlled thermomechanical processing with optimized rolling temperatures and cooling rates to achieve fine-grain microstructure and enhanced precipitation strengthening. Our advanced TMCP technology ensures superior yield strength and fatigue resistance while maintaining excellent formability for complex automotive and structural applications.
Comprehensive High-Strength Testing
MetalZenith conducts specialized testing protocols for high-strength steels including advanced formability testing (Erichsen cupping, bend tests), weldability assessments (HAZ hardness, crack susceptibility), hydrogen-induced cracking resistance evaluation, and delayed fracture testing. Our comprehensive quality assurance ensures optimal performance in demanding structural applications.
Custom Engineering Solutions
MetalZenith provides tailored processing solutions including custom heat treatment schedules, precision cutting, forming services, and technical consultation for high-strength steel applications. Our engineering team offers comprehensive support for automotive lightweighting, structural optimization, and application-specific property enhancement to meet exact project requirements.
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