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Technical Specifications
Product Overview
Metallurgical Characteristics
AISI 304L exhibits a fully austenitic microstructure at room temperature due to its balanced chromium-nickel composition. The low carbon content (≤ 0.030%) significantly reduces the formation of chromium carbides during welding and high-temperature exposure, maintaining corrosion resistance in heat-affected zones. The austenitic structure provides excellent ductility and toughness across a wide temperature range.
Heat Treatment and Processing
MetalZenith employs solution annealing at 1040-1120°C followed by rapid cooling to achieve optimal properties. This treatment dissolves any carbides and provides a homogeneous austenitic structure. Cold working increases strength but reduces ductility, while the material cannot be hardened by heat treatment. Our controlled atmosphere furnaces prevent surface oxidation and ensure consistent results.
Manufacturing Process Excellence
Our production process begins with electric arc furnace melting followed by AOD refining for precise composition control. Continuous casting produces high-quality billets, which undergo hot rolling, solution annealing, and pickling. Cold rolling and precision finishing operations achieve final dimensions and surface quality. Advanced process control systems monitor temperature, atmosphere, and cooling rates throughout production.
Quality Standards and Testing
MetalZenith maintains compliance with international standards including ASTM A240, EN 10088-2, and JIS G4305. Our quality management system encompasses incoming material inspection, in-process monitoring, and final product testing. Chemical composition verification using optical emission spectroscopy, mechanical property testing, intergranular corrosion testing (ASTM A262), and dimensional inspection ensure consistent quality. Non-destructive testing including ultrasonic and dye penetrant inspection is available for critical applications.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.030 |
| Manganese (Mn) | ≤ 2.00 |
| Silicon (Si) | ≤ 0.75 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 18.00 - 20.00 |
| Nickel (Ni) | 8.00 - 12.00 |
| Nitrogen (N) | ≤ 0.10 |
| Iron (Fe) | Balance |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 515 MPa |
| Yield Strength (0.2% Offset) | ≥ 205 MPa |
| Elongation in 50mm | ≥ 40% |
| Reduction of Area | ≥ 50% |
| Hardness (Brinell) | ≤ 200 HB |
| Hardness (Rockwell B) | ≤ 90 HRB |
| Impact Energy (Charpy V-notch at 20°C) | ≥ 120 J |
| Fatigue Limit (107 cycles) | 240 MPa |
| Modulus of Elasticity | 200 GPa |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density | 8.00 g/cm³ |
| Melting Point | 1400-1450°C |
| Thermal Conductivity (at 100°C) | 16.2 W/m·K |
| Thermal Expansion Coefficient (20-100°C) | 17.2×10-6/K |
| Specific Heat Capacity | 500 J/kg·K |
| Electrical Resistivity (at 20°C) | 0.72 µΩ·m |
| Magnetic Permeability | 1.02 (Paramagnetic) |
| Curie Temperature | Non-magnetic |
📏 Product Specifications
| Specification | Available Options |
|---|---|
| Product Forms | Sheets, Plates, Bars, Rods, Tubes, Pipes, Coils, Strips |
| Sheet Thickness | 0.3mm - 6.0mm |
| Plate Thickness | 6mm - 100mm |
| Bar Diameter | 6mm - 300mm |
| Tube Outer Diameter | 6mm - 610mm |
| Standards | ASTM A240, A276, A312, EN 10088-2, JIS G4305, GB/T 3280 |
| Surface Finishes | 2B, BA, No.4, HL (Hairline), Mirror, Pickled |
| Tolerance | ±0.1mm (thickness), ±3mm (width), ±6mm (length) |
| Edge Condition | Mill Edge, Slit Edge, Trimmed Edge |
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Our Advantages in Processing AISI 304L
Advanced AOD Refining Technology
MetalZenith utilizes cutting-edge Argon Oxygen Decarburization (AOD) technology combined with vacuum degassing systems to achieve precise carbon control below 0.030%, ensuring optimal weldability and preventing carbide precipitation during fabrication processes.
Comprehensive Quality Control System
Our state-of-the-art testing laboratory features advanced spectroscopic analysis, mechanical testing equipment, and non-destructive testing capabilities. Every batch undergoes rigorous chemical composition verification, mechanical property testing, and microstructure examination to guarantee consistent quality.
Global Supply Chain Excellence
MetalZenith offers extensive customization capabilities including precision cutting, surface finishing, and heat treatment services. Our global distribution network ensures reliable delivery worldwide, supported by comprehensive technical documentation and engineering support for specialized applications.
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