20 Years Experience | 1000+ Brand Partners | Full Customization
We have 20 years of industry experience, have partnered with over 1,000 brands, and support any customization needs.
Technical Specifications
Product Overview
Metallurgical Characteristics
J55 is a normalized medium-carbon alloy structural steel with a refined ferritic-pearlitic microstructure. The controlled addition of chromium, molybdenum, and nickel provides enhanced hardenability and improved mechanical properties. The fine grain structure achieved through controlled rolling ensures excellent strength-toughness balance essential for structural applications.
Heat Treatment Process
MetalZenith employs controlled rolling followed by normalization at 880-920°C with controlled cooling rates to achieve optimal microstructure. Our precise temperature control and cooling rate management ensure consistent mechanical properties and excellent dimensional stability throughout the material cross-section.
Manufacturing Excellence
Our advanced manufacturing process incorporates continuous casting, controlled rolling, and inline heat treatment to produce J55 steel with superior consistency. Real-time monitoring of chemical composition and mechanical properties ensures every batch meets stringent structural steel requirements.
Specialized Quality Testing
MetalZenith conducts comprehensive testing including welding performance evaluation per AWS D1.1, forming capability assessment, fatigue strength testing under cyclic loading, and atmospheric corrosion resistance testing. Our advanced testing protocols ensure superior performance in demanding structural environments.
Application Engineering
For building construction, J55 provides excellent strength-to-weight ratio and superior weldability for complex structural joints. In bridge engineering, the material's fatigue resistance and atmospheric corrosion resistance ensure long-term durability. For machinery manufacturing, the combination of strength and formability enables complex component fabrication. In vehicle construction, the material's impact toughness and consistent properties support safety-critical applications.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.20 - 0.25 |
| Manganese (Mn) | 1.20 - 1.60 |
| Silicon (Si) | 0.15 - 0.40 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 0.80 - 1.10 |
| Molybdenum (Mo) | 0.15 - 0.25 |
| Nickel (Ni) | 0.40 - 0.70 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (MPa) | ≥ 380 |
| Tensile Strength (MPa) | 520 - 655 |
| Elongation (%) | ≥ 18 |
| Impact Energy at 0°C (J) | ≥ 27 |
| Hardness (HB) | 163 - 217 |
| Fatigue Strength (MPa) | 240 - 280 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density (g/cm3) | 7.85 |
| Melting Point (°C) | 1480 - 1520 |
| Thermal Conductivity (W/m·K) | 42.7 |
| Thermal Expansion (×10??/K) | 11.8 |
| Elastic Modulus (GPa) | 200 |
| Poisson's Ratio | 0.27 - 0.30 |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Plates, Sheets, Beams, Channels, Angles, Bars |
| Thickness Range | 3 - 150mm |
| Width Range | 1000 - 3500mm |
| Length Range | 6000 - 15000mm |
| Standards Compliance | ASTM A572, EN 10025, JIS G3106 |
| Heat Treatment Condition | Normalized or TMCP |
| Surface Finish | Hot Rolled, Pickled, Shot Blasted |
Let Us Create Success for Your Project
Professional Team, Premium Products, Complete Service - Your Project Success is Our Mission
Our Advantages in Processing J55 Steel
Advanced Thermomechanical Processing
MetalZenith utilizes controlled rolling and precise normalization processes with real-time microstructure monitoring to achieve optimal grain refinement and enhanced mechanical properties. Our advanced processing ensures consistent strength and excellent formability throughout the material cross-section.
Comprehensive Structural Testing
Our J55 steel undergoes extensive testing including welding performance evaluation, forming capability assessment, fatigue strength testing, and atmospheric corrosion resistance analysis. This comprehensive testing ensures superior performance in demanding structural applications.
Custom Engineering Solutions
MetalZenith provides tailored processing services including precision cutting, forming, and heat treatment optimization. Our technical team offers comprehensive support for structural design requirements and application-specific material modifications.
YOUR TRUSTED STEEL
MANUFACTURING PARTNER
Quick Inquiry
Industries We Serve
Professional steel solutions across major industries
Qualifications & Certifications
