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Technical Specifications
Product Overview
Metallurgical Characteristics
AISI 316L is an austenitic stainless steel with a face-centered cubic crystal structure. The low carbon content (≤0.030%) prevents carbide precipitation during welding, eliminating the need for post-weld annealing. The addition of molybdenum (2-3%) significantly enhances corrosion resistance, particularly against chloride-induced pitting and crevice corrosion.
Manufacturing Process
MetalZenith produces AISI 316L through vacuum induction melting followed by electroslag remelting to achieve exceptional cleanliness and homogeneity. The steel undergoes controlled hot rolling at temperatures between 1050-1200°C, followed by solution annealing at 1040-1100°C and rapid cooling to retain the austenitic structure. Cold rolling and precision finishing operations ensure dimensional accuracy and surface quality.
Heat Treatment
Solution annealing is performed at 1040-1100°C followed by rapid cooling in water or air. This treatment dissolves carbides and achieves optimal corrosion resistance. The steel cannot be hardened by heat treatment but can be work-hardened through cold deformation. Stress relief annealing at 850-900°C may be applied to reduce residual stresses without compromising corrosion resistance.
Quality Standards & Testing
All AISI 316L products undergo comprehensive testing including chemical analysis per ASTM E1019, mechanical property testing per ASTM A370, and corrosion resistance evaluation per ASTM A262. Non-destructive testing includes ultrasonic inspection, dye penetrant testing, and eddy current examination. MetalZenith maintains full traceability from raw materials through final inspection, ensuring compliance with aerospace, nuclear, and pharmaceutical industry requirements.
🧪 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) | 485 - 620 MPa |
| Yield Strength (Rp0.2) | ≥ 205 MPa |
| Elongation (A50mm) | ≥ 40% |
| Hardness (HRB) | ≤ 95 |
| Hardness (HV) | 200 - 250 |
| Impact Energy (KV) | ≥ 60 J (at 20°C) |
| Young's Modulus | 200 GPa |
| Fatigue Limit | 245 MPa (107 cycles) |
| Poisson's Ratio | 0.27 - 0.30 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density | 8.00 g/cm³ |
| Melting Point | 1400 - 1450°C |
| Thermal Conductivity (20°C) | 16.3 W/m·K |
| Thermal Conductivity (100°C) | 18.3 W/m·K |
| Thermal Expansion (20-100°C) | 16.0×10-6/K |
| Thermal Expansion (20-300°C) | 17.0×10-6/K |
| Specific Heat Capacity | 500 J/kg·K |
| Electrical Resistivity (20°C) | 0.74 µΩ·m |
| Magnetic Permeability | 1.02 µr (Non-magnetic) |
| Curie Temperature | Non-magnetic |
📏 Product Specifications
| Specification | Available Options |
|---|---|
| Product Forms | Sheets, Plates, Bars, Rods, Tubes, Pipes, Coils, Strips |
| Sheet Thickness | 0.3 - 6.0 mm |
| Plate Thickness | 6.0 - 200 mm |
| Bar Diameter | 6 - 300 mm |
| Tube Outer Diameter | 6 - 610 mm |
| Standards | ASTM A240, A276, A312, EN 10088-2, JIS G4305, GB/T 3280 |
| Surface Finishes | 2B, BA, No.4, HL, Mirror, Pickled |
| Dimensional Tolerance | ±0.05 mm (thickness), ±0.5 mm (width/length) |
| Edge Condition | Mill Edge, Slit Edge, Sheared Edge |
| Heat Treatment | Solution Annealed (1040-1100°C) |
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Our Advantages in Processing AISI 316L
Advanced Vacuum Melting Technology
MetalZenith employs state-of-the-art vacuum induction melting (VIM) and electroslag remelting (ESR) processes to produce AISI 316L with exceptional purity and homogeneity. Our controlled atmosphere melting eliminates inclusions and ensures precise chemical composition control, resulting in superior mechanical properties and corrosion resistance.
Comprehensive Quality Control System
Our integrated quality management system features real-time chemical analysis using optical emission spectroscopy, automated mechanical testing laboratories, and advanced non-destructive testing equipment. Every batch of AISI 316L undergoes rigorous inspection protocols ensuring consistent quality and compliance with international standards.
Global Supply Chain & Customization
MetalZenith maintains strategic inventory locations worldwide and offers extensive customization capabilities including precision cutting, surface finishing, and heat treatment services. Our flexible production scheduling and logistics network ensure timely delivery of AISI 316L products tailored to specific customer requirements and project timelines.
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