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Technical Specifications
Product Overview
Metallurgical Characteristics
AISI 316 exhibits a fully austenitic microstructure at room temperature, characterized by face-centered cubic crystal structure. The addition of molybdenum enhances corrosion resistance, particularly against chloride-induced pitting and crevice corrosion. The material maintains excellent toughness across a wide temperature range from cryogenic to elevated temperatures.
Heat Treatment Processes
MetalZenith employs precise solution annealing at 1040-1120°C followed by rapid cooling to achieve optimal properties. Our controlled atmosphere furnaces prevent surface oxidation and ensure uniform heating. Post-processing includes stress relief annealing when required for specific applications, maintaining dimensional stability and residual stress control.
Manufacturing Process Excellence
Our integrated manufacturing process begins with vacuum induction melting using premium raw materials. The molten steel undergoes electroslag remelting for enhanced cleanliness, followed by controlled hot working and precision cold finishing. Advanced process control systems monitor temperature, atmosphere, and mechanical parameters throughout production.
Quality Standards & Testing
Every production batch undergoes comprehensive testing including optical emission spectroscopy for chemical analysis, tensile testing per ASTM A370, hardness verification, and corrosion resistance evaluation. Non-destructive testing includes ultrasonic inspection, eddy current testing, and surface penetrant inspection. All products are supplied with certified test reports and full material traceability documentation.
Corrosion Resistance Performance
AISI 316 demonstrates exceptional resistance to various corrosive environments including seawater, chloride solutions, and organic acids. The molybdenum content provides superior pitting resistance with PREN (Pitting Resistance Equivalent Number) of approximately 25, making it suitable for marine and chemical processing applications where standard austenitic grades may fail.
🧪 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) | 16.00 - 18.00 |
| Nickel (Ni) | 10.00 - 14.00 |
| Molybdenum (Mo) | 2.00 - 3.00 |
| Nitrogen (N) | ≤ 0.10 |
| Iron (Fe) | Balance |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (Rm) | ≥ 515 MPa |
| Yield Strength (Rp0.2) | ≥ 205 MPa |
| Elongation (A5) | ≥ 40% |
| Hardness (HB) | ≤ 215 |
| Hardness (HRC) | ≤ 95 |
| Impact Energy (KV) | ≥ 60 J |
| Young's Modulus | 200 GPa |
| Fatigue Limit | 240 MPa |
| Reduction of Area | ≥ 50% |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density | 8.00 g/cm³ |
| Melting Point | 1375-1400°C |
| Thermal Conductivity (20°C) | 16.2 W/m·K |
| Thermal Expansion (20-100°C) | 16.0×10-6/K |
| Specific Heat Capacity | 500 J/kg·K |
| Electrical Resistivity (20°C) | 0.74 µΩ·m |
| Magnetic Permeability | 1.02 µr |
| Curie Temperature | Non-magnetic |
| Thermal Diffusivity | 4.2×10-6 m²/s |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Round bars, square bars, flat bars, sheets, plates, tubes, pipes, coils |
| Round Bar Sizes | 6mm - 300mm diameter |
| Sheet Thickness | 0.5mm - 6mm |
| Plate Thickness | 6mm - 100mm |
| Tube Sizes | 6mm - 219mm OD, 0.5mm - 20mm wall thickness |
| Standards | ASTM A240, A276, A312, A479, EN 1.4401, JIS SUS316 |
| Surface Finishes | 2B, BA, No.4, HL, mirror finish, pickled |
| Tolerances | ±0.1mm for precision products, standard ASTM tolerances |
| Length | Up to 12 meters or customer specification |
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Our Advantages in Processing AISI 316
Advanced Vacuum Melting Technology
MetalZenith employs cutting-edge vacuum induction melting (VIM) and electroslag remelting (ESR) processes to achieve exceptional chemical homogeneity and purity in AISI 316 production. Our controlled atmosphere melting eliminates inclusions and ensures consistent mechanical properties throughout the material.
Comprehensive Quality Control System
Our integrated quality management system features real-time process monitoring, automated chemical analysis, and advanced non-destructive testing. Every batch undergoes rigorous testing including ultrasonic inspection, magnetic particle testing, and mechanical property verification to guarantee superior quality.
Custom Processing & Global Supply Chain
MetalZenith offers extensive customization capabilities including precision machining, specialized heat treatments, and custom dimensions. Our global distribution network ensures reliable delivery worldwide, supported by comprehensive technical services and engineering consultation for optimal material selection.
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