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Technical Specifications
Product Overview
Metallurgical Characteristics
Gear Steel exhibits a fine-grained martensitic-bainitic microstructure after proper heat treatment, providing excellent combination of strength and toughness. The controlled addition of chromium, nickel, and molybdenum enhances hardenability and provides superior mechanical properties throughout the cross-section, making it ideal for structural applications requiring high load-bearing capacity.
Heat Treatment Process
MetalZenith employs controlled austenitizing at 850-900°C followed by oil quenching and tempering at 550-650°C to achieve optimal mechanical properties. Our precise temperature control and cooling rate management ensure uniform hardness distribution and minimize residual stresses, critical for structural integrity.
Manufacturing Process
Our advanced manufacturing process includes vacuum degassing, controlled forging, and precision heat treatment. MetalZenith utilizes state-of-the-art induction heating and computer-controlled cooling systems to ensure consistent microstructure and mechanical properties throughout the material cross-section.
Structural Quality Testing
Comprehensive testing protocols include welding performance evaluation using standard procedures, forming capability assessment through bend testing, fatigue strength testing under cyclic loading conditions, and atmospheric corrosion resistance testing in salt spray environments. These specialized tests ensure optimal performance in structural applications.
Application Engineering
For building structures, Gear Steel provides excellent load-bearing capacity and seismic resistance. In bridge engineering, its superior fatigue strength ensures long-term structural integrity under dynamic loading. For mechanical manufacturing, the material offers exceptional machinability and dimensional stability. In vehicle manufacturing, it provides optimal strength-to-weight ratio for chassis and frame components. General engineering applications benefit from its versatile processing capabilities and reliable performance characteristics.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.15 - 0.25 |
| Manganese (Mn) | 0.70 - 1.00 |
| Silicon (Si) | 0.15 - 0.35 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.040 |
| Chromium (Cr) | 0.80 - 1.10 |
| Nickel (Ni) | 1.65 - 2.00 |
| Molybdenum (Mo) | 0.20 - 0.30 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (MPa) | ≥ 550 |
| Tensile Strength (MPa) | 750 - 950 |
| Elongation (%) | ≥ 15 |
| Impact Energy at 20°C (J) | ≥ 35 |
| Hardness (HRC) | 22 - 28 |
| Fatigue Strength (MPa) | ≥ 350 |
🔬 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 | Bars, Rods, Plates, Forgings, Structural Sections |
| Diameter Range | 10 - 300mm |
| Thickness Range | 8 - 150mm |
| Length Range | 3000 - 12000mm |
| Standards Compliance | ASTM A29, SAE 8620, DIN 20NiCrMo2 |
| Heat Treatment Condition | Annealed, Normalized, Q&T |
| Surface Finish | Hot Rolled, Cold Drawn, Machined |
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Our Advantages in Processing Gear Steel
Advanced Heat Treatment Processing
MetalZenith employs precision-controlled quenching and tempering processes with real-time temperature monitoring to achieve optimal microstructure and enhanced mechanical properties. Our advanced heat treatment ensures consistent hardness distribution and superior fatigue strength throughout the material cross-section.
Comprehensive Structural Testing
Our rigorous quality assurance includes specialized testing for structural applications: advanced welding performance evaluation, forming capability assessment, fatigue strength testing under cyclic loading, and atmospheric corrosion resistance testing to ensure long-term structural integrity.
Custom Engineering Solutions
MetalZenith provides comprehensive custom processing services including precision machining, heat treatment optimization, and technical consultation. Our engineering team works closely with clients to develop tailored solutions for specific structural and mechanical applications.
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