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Technical Specifications
Product Overview
Metallurgical Characteristics
S135 is a quenched and tempered high-strength structural steel with a predominantly tempered martensitic microstructure. The controlled addition of alloying elements including chromium, molybdenum, and nickel provides enhanced hardenability and improved mechanical properties. The fine-grained microstructure ensures excellent strength-toughness balance essential for structural applications.
Heat Treatment Process
MetalZenith employs controlled austenitizing at 850-900°C followed by water quenching and tempering at 580-650°C with precise temperature control. This heat treatment cycle produces optimal microstructural refinement and stress relief, ensuring dimensional stability and consistent mechanical properties throughout the cross-section.
Manufacturing Process
Our S135 steel production utilizes electric arc furnace melting with secondary refining processes including ladle furnace treatment and vacuum degassing. Continuous casting followed by controlled rolling ensures homogeneous chemical composition and microstructure. Advanced quality control systems monitor every stage from melting to final inspection.
Structural Quality Testing
MetalZenith conducts comprehensive testing protocols specific to structural applications including welding procedure qualification tests, bend testing for forming capability assessment, rotating beam fatigue testing under variable amplitude loading, and accelerated atmospheric corrosion testing. These specialized tests ensure optimal performance in demanding structural environments.
Application Engineering Considerations
For building construction applications, S135 provides excellent seismic resistance and load-bearing capacity. In bridge engineering, the superior fatigue resistance ensures long-term structural integrity under traffic loading. For machinery manufacturing, the high strength-to-weight ratio enables compact designs. In vehicle construction, the excellent forming properties facilitate complex geometries while maintaining structural performance. General engineering applications benefit from the versatile processing capabilities and reliable mechanical properties.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.28 - 0.35 |
| Manganese (Mn) | 1.20 - 1.60 |
| Silicon (Si) | 0.15 - 0.40 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 0.40 - 0.70 |
| Molybdenum (Mo) | 0.15 - 0.25 |
| Nickel (Ni) | 0.30 - 0.70 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (MPa) | ≥ 930 |
| Tensile Strength (MPa) | 980 - 1180 |
| Elongation (%) | ≥ 14 |
| Impact Energy at 0°C (J) | ≥ 40 |
| Hardness (HB) | 280 - 340 |
| Fatigue Strength (MPa) | ≥ 450 |
🔬 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) | 11.8 |
| Elastic Modulus (GPa) | 210 |
| Poisson's Ratio | 0.27 - 0.30 |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Plates, Beams, Channels, Angles, Bars, Tubes |
| Thickness Range | 8 - 150mm |
| Width Range | 1200 - 3500mm |
| Length Range | 6000 - 15000mm |
| Standards Compliance | ASTM A514, EN 10025-6, JIS G3106 |
| Heat Treatment Condition | Quenched and Tempered |
| Surface Finish | Hot Rolled, Shot Blasted, Pickled |
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Our Advantages in Processing S135 Steel
Advanced Quenching-Tempering Process
MetalZenith employs precision-controlled quenching and tempering processes with real-time temperature monitoring to achieve optimal martensitic-tempered microstructure. Our advanced heat treatment ensures consistent high strength and excellent toughness throughout the material cross-section, critical for structural applications.
Comprehensive Structural Testing
Our S135 steel undergoes rigorous testing protocols including welding performance evaluation, forming capability assessment, fatigue strength testing under cyclic loading, and atmospheric corrosion resistance testing. These specialized tests ensure optimal performance in structural applications with varying environmental conditions.
Custom Structural Solutions
MetalZenith provides comprehensive custom processing services including precision cutting, forming, welding preparation, and surface treatment specifically tailored for structural applications. Our technical support team offers expert guidance on joint design, fabrication techniques, and structural optimization.
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