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Technical Specifications
Product Overview
Metallurgical Characteristics
AISI 4130 is a low-alloy steel with a tempered martensitic microstructure when properly heat treated. The chromium content provides hardenability and corrosion resistance, while molybdenum enhances strength, toughness, and elevated temperature properties. The balanced carbon content ensures good weldability without preheating in most applications.
Heat Treatment Processes
MetalZenith's controlled heat treatment processes include normalization at 870-900°C, followed by air cooling. For maximum strength, austenitizing at 845-885°C, oil quenching, and tempering at 540-650°C depending on desired hardness. Our computer-controlled furnaces ensure uniform heating and precise temperature control throughout the process.
Manufacturing Excellence
Our manufacturing process begins with carefully selected raw materials melted in electric arc furnaces with ladle refining. Secondary steelmaking includes vacuum degassing and calcium treatment for inclusion modification. Hot rolling is performed with controlled cooling to achieve optimal microstructure and mechanical properties.
Quality Standards & Certifications
MetalZenith maintains compliance with ASTM A29/A29M, ASTM A322, ASTM A519, EN 10083-3, and JIS G4105 standards. Our quality management system includes statistical process control, continuous monitoring of chemical composition, and mechanical property verification. All products are supplied with comprehensive mill test certificates and traceability documentation.
Welding & Fabrication Guidelines
AISI 4130 exhibits excellent weldability using conventional methods including TIG, MIG, and stick welding. Preheating to 200-300°C is recommended for sections over 25mm thickness. Post-weld stress relief at 580-650°C enhances joint properties and reduces residual stresses. MetalZenith provides comprehensive welding procedure specifications for critical applications.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.28 - 0.33 |
| Manganese (Mn) | 0.40 - 0.60 |
| Silicon (Si) | 0.15 - 0.35 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.040 |
| Chromium (Cr) | 0.80 - 1.10 |
| Molybdenum (Mo) | 0.15 - 0.25 |
| Nickel (Ni) | ≤ 0.25 |
| Copper (Cu) | ≤ 0.35 |
| Iron (Fe) | Balance |
⚙️ Mechanical Properties
| Property | Normalized | Quenched & Tempered |
|---|---|---|
| Tensile Strength | 670 - 830 MPa | 850 - 1200 MPa |
| Yield Strength (0.2% offset) | 460 - 560 MPa | 680 - 950 MPa |
| Elongation (50mm) | ≥ 21.5% | ≥ 17% |
| Reduction of Area | ≥ 59% | ≥ 50% |
| Hardness (HB) | 197 - 235 | 248 - 352 |
| Impact Energy (Charpy V-notch) | ≥ 54 J | ≥ 47 J |
| Fatigue Limit (10&sup7; cycles) | 290 - 350 MPa | 400 - 500 MPa |
| Modulus of Elasticity | 205 GPa | 205 GPa |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Melting Point | 1432 - 1449°C |
| Thermal Conductivity (20°C) | 42.7 W/m·K |
| Thermal Expansion Coefficient (20-100°C) | 12.2×10-6/K |
| Specific Heat Capacity | 486 J/kg·K |
| Electrical Resistivity (20°C) | 0.22 µΩ·m |
| Magnetic Permeability | Ferromagnetic |
| Curie Temperature | 770°C |
| Poisson's Ratio | 0.27 - 0.30 |
| Thermal Diffusivity (20°C) | 11.2 mm²/s |
📏 Product Specifications
| Specification | Available Options |
|---|---|
| Product Forms | Round bars, square bars, flat bars, plates, sheets, tubes, pipes, forgings |
| Round Bar Diameter | 6mm - 500mm |
| Plate Thickness | 3mm - 200mm |
| Tube Wall Thickness | 1mm - 50mm |
| Length | Up to 12 meters (custom lengths available) |
| Standards | ASTM A29, ASTM A322, ASTM A519, EN 10083-3, JIS G4105 |
| Surface Finish | Hot rolled, cold drawn, turned & polished, ground |
| Tolerance | h9, h10, h11 (bars), ±0.1mm - ±0.5mm (plates) |
| Heat Treatment | Annealed, normalized, quenched & tempered |
| Testing | Mill test certificate, third-party inspection available |
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Our Advantages in Processing AISI 4130
Advanced Vacuum Melting Technology
MetalZenith employs cutting-edge vacuum induction melting (VIM) and electroslag remelting (ESR) processes to produce ultra-clean AISI 4130 steel with minimal inclusions and superior homogeneity. Our controlled atmosphere processing ensures consistent chemical composition and enhanced mechanical properties throughout the entire cross-section.
Comprehensive Quality Control System
Our state-of-the-art testing laboratory features advanced spectroscopic analysis, automated tensile testing, and non-destructive evaluation equipment. Every batch of AISI 4130 undergoes rigorous inspection including ultrasonic testing, magnetic particle inspection, and dimensional verification to guarantee compliance with international standards.
Custom Processing & Global Supply Chain
MetalZenith offers extensive customization capabilities including precision machining, heat treatment services, and custom alloy modifications. Our global distribution network ensures reliable delivery worldwide, while our technical support team provides engineering assistance for application-specific requirements and material optimization.
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