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Technical Specifications
Product Overview
Metallurgical Characteristics
S55C exhibits a predominantly pearlitic microstructure in the normalized condition, with fine carbide distribution providing excellent strength and hardness. The high carbon content (0.52-0.58%) enables significant strengthening through heat treatment, while controlled manganese content ensures adequate hardenability and improved mechanical properties. The fine-grained structure achieved through controlled rolling enhances both strength and toughness for structural applications.
Heat Treatment Process
MetalZenith employs optimized heat treatment cycles including normalization at 850-900°C followed by air cooling, or quenching and tempering processes with austenitizing at 820-860°C, oil quenching, and tempering at 400-650°C depending on required hardness levels. Our controlled atmosphere furnaces ensure uniform heating and prevent decarburization, maintaining consistent mechanical properties throughout the cross-section.
Advanced Manufacturing Process
Our production process begins with electric arc furnace melting followed by ladle refining to achieve precise chemical composition. Continuous casting and controlled rolling at optimized temperatures ensure fine grain structure and excellent surface quality. MetalZenith's advanced rolling mills maintain tight dimensional tolerances while our heat treatment facilities provide consistent mechanical properties across all product forms.
Specialized Quality Testing
Comprehensive testing protocols include welding performance evaluation using standard welding procedures, forming capability assessment through bend testing and deep drawing trials, fatigue strength testing under rotating beam and axial loading conditions, and atmospheric corrosion resistance testing in salt spray environments. These specialized tests ensure S55C steel meets demanding structural engineering requirements.
Application Engineering Considerations
For building structural applications, S55C provides excellent strength-to-weight ratio and weldability when proper preheating procedures are followed. In bridge engineering, the material's fatigue resistance and atmospheric corrosion properties make it suitable for dynamic loading conditions. For machinery manufacturing, the high hardness capability enables wear-resistant components, while in automotive applications, the material's response to heat treatment allows optimization for specific component requirements in transmission and drivetrain systems.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.52 - 0.58 |
| Manganese (Mn) | 0.60 - 0.90 |
| Silicon (Si) | 0.15 - 0.35 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.035 |
| Chromium (Cr) | ≤ 0.20 |
| Nickel (Ni) | ≤ 0.20 |
| Copper (Cu) | ≤ 0.30 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (MPa) | ≥ 490 |
| Tensile Strength (MPa) | 690 - 850 |
| Elongation (%) | ≥ 16 |
| Impact Energy at 20°C (J) | ≥ 39 |
| Hardness (HB) | 201 - 269 |
| Fatigue Strength (MPa) | ≥ 310 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density (g/cm3) | 7.85 |
| Melting Point (°C) | 1460 - 1520 |
| Thermal Conductivity (W/m·K) | 49.8 |
| Thermal Expansion (×10??/K) | 12.3 |
| Elastic Modulus (GPa) | 210 |
| Poisson's Ratio | 0.27 - 0.30 |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Round Bars, Square Bars, Flat Bars, Plates, Forgings |
| Diameter Range | 10 - 300mm |
| Thickness Range | 5 - 80mm |
| Length Range | 3000 - 12000mm |
| Standards Compliance | JIS G4051, ASTM A29, ISO 683-1 |
| Heat Treatment Condition | Annealed, Normalized, Q&T |
| Surface Finish | Hot Rolled, Cold Drawn, Machined |
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Our Advantages in Processing S55C Carbon Steel
Precision Heat Treatment Processing
MetalZenith utilizes advanced quenching and tempering processes with precise temperature control and controlled cooling rates to achieve optimal mechanical properties in S55C steel. Our sophisticated heat treatment facilities ensure consistent hardness distribution and superior strength-to-toughness balance throughout the material thickness.
Comprehensive Structural Testing
Our quality assurance program includes specialized testing for structural applications: welding performance evaluation, forming capability assessment, fatigue strength testing under cyclic loading, and atmospheric corrosion resistance testing. These comprehensive evaluations ensure S55C steel meets demanding structural engineering requirements.
Custom Processing & Engineering Support
MetalZenith provides tailored heat treatment schedules, custom dimensional processing, and comprehensive technical support for S55C applications. Our metallurgical engineers work closely with customers to optimize material properties for specific structural and mechanical requirements, ensuring optimal performance in end-use applications.
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