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Technical Specifications
Product Overview
Metallurgical Characteristics
St 44 is a normalized carbon-manganese structural steel with a predominantly ferritic-pearlitic microstructure. The controlled carbon content and manganese addition provide optimal balance between strength and ductility, while maintaining excellent weldability. The fine-grain structure achieved through controlled processing ensures uniform mechanical properties and superior structural integrity.
Heat Treatment Process
MetalZenith employs controlled rolling followed by normalization at 880-920°C with controlled cooling rates to achieve optimal microstructural refinement. This process eliminates internal stresses and ensures uniform grain structure throughout the material cross-section, critical for structural applications requiring consistent mechanical properties.
Manufacturing Excellence
Our advanced production process incorporates continuous casting, controlled rolling, and precise temperature management to ensure superior material homogeneity. MetalZenith's state-of-the-art facilities enable tight control over chemical composition and mechanical properties, resulting in consistent quality for structural applications.
Specialized Quality Testing
St 44 undergoes comprehensive testing including weldability assessments per AWS D1.1, forming trials for bend radius determination, fatigue testing under cyclic loading conditions, and atmospheric corrosion resistance evaluation. Our quality assurance ensures optimal performance in structural environments with superior joint integrity and long-term durability.
Application Engineering Considerations
For building construction, St 44 provides excellent beam and column performance with superior load-bearing capacity. In bridge engineering, the material offers optimal fatigue resistance and weather durability. For machinery manufacturing, the steel ensures reliable frame integrity and vibration resistance. In vehicle construction, St 44 delivers excellent crash performance and structural safety. General engineering applications benefit from the material's versatile forming characteristics and reliable weld joint performance.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.17 - 0.20 |
| Manganese (Mn) | 1.40 - 1.70 |
| Silicon (Si) | 0.15 - 0.40 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.035 |
| Aluminum (Al) | ≥ 0.020 |
| Copper (Cu) | ≤ 0.30 |
| Chromium (Cr) | ≤ 0.30 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (MPa) | ≥ 275 |
| Tensile Strength (MPa) | 430 - 580 |
| Elongation (%) | ≥ 22 |
| Impact Energy at 20°C (J) | ≥ 27 |
| Hardness (HB) | 130 - 180 |
| Fatigue Strength (MPa) | 200 - 250 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density (g/cm3) | 7.85 |
| 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 | 0.27 - 0.30 |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Plates, Sheets, Beams, Angles, Channels, Bars |
| Thickness Range | 3 - 80mm |
| Width Range | 1000 - 3000mm |
| Length Range | 6000 - 12000mm |
| Standards Compliance | DIN 17100, EN 10025, ASTM A36 equivalent |
| Heat Treatment Condition | Normalized or Hot Rolled |
| Surface Finish | Hot Rolled, Pickled, Shot Blasted |
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Our Advantages in Processing St 44 Steel
Controlled Rolling & Normalization Process
MetalZenith utilizes advanced controlled rolling techniques followed by precise normalization at optimal temperatures to achieve uniform grain structure and enhanced mechanical properties. Our process ensures consistent strength and ductility throughout the material thickness, essential for structural applications.
Comprehensive Structural Testing
Our St 44 steel undergoes extensive testing including weldability assessments, forming trials, fatigue resistance evaluation, and atmospheric corrosion testing. MetalZenith's quality assurance ensures optimal performance in structural applications with superior joint integrity and long-term durability.
Custom Fabrication & Technical Support
MetalZenith provides comprehensive custom processing services including cutting, forming, and heat treatment tailored to specific structural requirements. Our technical team offers expert consultation on welding procedures, joint design, and structural optimization for enhanced project outcomes.
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