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Technical Specifications
Product Overview
Metallurgical Characteristics
S690 is a quenched and tempered high-strength structural steel with a predominantly tempered martensitic microstructure. The controlled addition of alloying elements including chromium, nickel, and molybdenum provides enhanced hardenability and strength, while maintaining excellent toughness and weldability essential for structural applications.
Heat Treatment Process
MetalZenith employs controlled austenitizing at 880-920°C followed by water quenching and tempering at 580-650°C. This precise heat treatment cycle ensures optimal strength-toughness balance and dimensional stability critical for structural components subjected to high stress loads.
Advanced Manufacturing Process
Our S690 production utilizes electric arc furnace steelmaking with secondary refining, continuous casting, and controlled rolling prior to heat treatment. MetalZenith's integrated quality management system ensures consistent chemical composition and mechanical properties throughout each production batch.
Structural Performance Testing
Comprehensive testing protocols include welding performance evaluation using standard procedures, cold forming tests to assess bendability, fatigue testing under cyclic loading conditions, and atmospheric corrosion resistance testing. These specialized tests ensure S690 meets the demanding requirements of structural applications.
Application Engineering Considerations
For building structures, S690 enables reduced section sizes and weight savings while maintaining structural integrity. In bridge engineering, the high strength allows for longer spans and reduced maintenance. For machinery manufacturing and vehicle construction, the excellent strength-to-weight ratio improves performance and fuel efficiency. General engineering applications benefit from superior fatigue resistance and design flexibility.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.20 |
| Manganese (Mn) | ≤ 1.70 |
| Silicon (Si) | ≤ 0.80 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.015 |
| Chromium (Cr) | ≤ 1.50 |
| Nickel (Ni) | ≤ 2.00 |
| Molybdenum (Mo) | ≤ 0.70 |
| Boron (B) | ≤ 0.005 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (MPa) | ≥ 690 |
| Tensile Strength (MPa) | 770 - 940 |
| Elongation (%) | ≥ 14 |
| Impact Energy at -40°C (J) | ≥ 30 |
| Hardness (HB) | 230 - 280 |
| Fatigue Strength (MPa) | ≥ 345 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density (g/cm3) | 7.85 |
| Melting Point (°C) | 1480 - 1520 |
| Thermal Conductivity (W/m·K) | 44.5 |
| Thermal Expansion (×10??/K) | 12.5 |
| Elastic Modulus (GPa) | 210 |
| Poisson's Ratio | 0.30 |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Plates, Sheets, Bars, Beams, Channels, Angles |
| Thickness Range | 3 - 100mm |
| Width Range | 1000 - 3200mm |
| Length Range | 6000 - 15000mm |
| Standards Compliance | EN 10025-6, ASTM A514, JIS G3106 |
| Heat Treatment Condition | Quenched and Tempered (Q+T) |
| Surface Finish | Hot Rolled, Shot Blasted, Pickled |
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Our Advantages in Processing S690 High Strength Structural Steel
Advanced Quenching & Tempering Technology
MetalZenith utilizes precision-controlled quenching and tempering processes with real-time temperature monitoring and controlled cooling rates to achieve optimal martensitic transformation and subsequent tempering. Our advanced heat treatment ensures consistent high strength and excellent toughness throughout the material thickness.
Comprehensive Structural Performance Testing
Our S690 steel undergoes extensive testing including Charpy V-notch impact testing, fatigue strength evaluation, welding performance assessment, and atmospheric corrosion resistance testing. MetalZenith ensures superior formability and weldability critical for structural applications requiring complex fabrication.
Custom Structural Solutions & Engineering Support
MetalZenith provides tailored cutting, forming, and heat treatment services with comprehensive technical support for structural design optimization. Our engineering team offers consultation on joint design, welding procedures, and fabrication techniques to maximize the performance of S690 steel in demanding structural applications.
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