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Technical Specifications
Product Overview
Metallurgical Characteristics
GB 60Si2Mn is a medium-carbon silicon-manganese spring steel characterized by its excellent elastic properties and high fatigue resistance. The silicon content (1.6-2.0%) significantly enhances the steel's elastic limit and resistance to decarburization during heat treatment, while manganese (0.6-0.9%) improves hardenability and strength. The carefully balanced carbon content (0.56-0.64%) provides optimal combination of strength and ductility.
Heat Treatment Process
MetalZenith employs a sophisticated heat treatment process for GB 60Si2Mn steel: austenitizing at 860-880°C, followed by oil quenching to achieve martensitic structure, then tempering at 420-480°C to obtain the desired hardness and toughness balance. Our controlled atmosphere furnaces prevent decarburization and ensure uniform heating throughout the cross-section.
Manufacturing Process
Our production process begins with electric arc furnace melting followed by ladle refining to achieve precise chemical composition. The steel undergoes continuous casting, hot rolling, and controlled cooling. MetalZenith's advanced rolling mills ensure excellent surface quality and dimensional accuracy. Cold drawing and peeling operations provide superior surface finish and tight tolerances when required.
Quality Standards & Testing
All GB 60Si2Mn steel products undergo comprehensive testing including chemical analysis by optical emission spectroscopy, mechanical testing per ASTM standards, ultrasonic inspection for internal soundness, and metallographic examination. MetalZenith maintains full traceability from raw materials to finished products, with complete documentation provided including mill test certificates and material data sheets.
🧪 Chemical Composition
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.56-0.64 |
| Silicon (Si) | 1.60-2.00 |
| Manganese (Mn) | 0.60-0.90 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.035 |
| Chromium (Cr) | ≤ 0.35 |
| Nickel (Ni) | ≤ 0.35 |
| Copper (Cu) | ≤ 0.25 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 1275-1570 MPa |
| Yield Strength (0.2% offset) | ≥ 1080 MPa |
| Elongation (A5) | ≥ 8% |
| Reduction of Area | ≥ 35% |
| Hardness (HRC) | 38-45 |
| Impact Energy (Charpy V-notch) | ≥ 25 J |
| Fatigue Limit (107 cycles) | 550-650 MPa |
| Elastic Modulus | 206 GPa |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density | 7.80 g/cm³ |
| Melting Point | 1480-1520°C |
| Thermal Conductivity (20°C) | 42 W/m·K |
| Thermal Expansion Coefficient (20-100°C) | 11.5×10-6/K |
| Specific Heat Capacity | 460 J/kg·K |
| Electrical Resistivity (20°C) | 0.25 µΩ·m |
| Magnetic Permeability | Ferromagnetic |
| Curie Temperature | 750°C |
📏 Product Specifications
| Specification | Available Options |
|---|---|
| Product Forms | Round bars, flat bars, wire, strips, sheets, plates |
| Round Bar Diameter | 5-300 mm |
| Flat Bar Dimensions | 10-100 mm thickness, up to 300 mm width |
| Wire Diameter | 0.5-20 mm |
| Sheet/Plate Thickness | 1-50 mm |
| Length | Up to 12 meters (custom lengths available) |
| Surface Finish | Hot rolled, cold drawn, peeled, ground, polished |
| Tolerance | h9, h10, h11 (as per ISO 286) |
| Standards | GB/T 1222, JIS G4801 (SUP7), EN 10089 |
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Our Advantages in Processing GB 60Si2Mn
Advanced Heat Treatment Technology
MetalZenith employs state-of-the-art controlled atmosphere furnaces with precise temperature control (±5°C) and automated quenching systems to achieve optimal microstructure and mechanical properties in GB 60Si2Mn steel, ensuring consistent spring performance and extended service life.
Comprehensive Quality Control System
Our integrated quality management system includes real-time chemical composition monitoring, automated mechanical testing, and advanced metallographic analysis. Every batch of GB 60Si2Mn undergoes rigorous fatigue testing and dimensional inspection to guarantee compliance with international standards.
Custom Processing & Global Supply
MetalZenith offers complete customization services including precision cutting, surface treatment, and specialized heat treatment profiles. Our global distribution network and strategic inventory management ensure reliable supply of GB 60Si2Mn steel in various forms and specifications worldwide.
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