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Technical Specifications
Product Overview
Metallurgical Characteristics
AISI 316Ti is an austenitic stainless steel stabilized with titanium to prevent carbide precipitation and sensitization. The titanium content, maintained at a minimum of 5 times the carbon content, forms stable titanium carbides (TiC) that prevent chromium carbide formation at grain boundaries. This stabilization mechanism ensures excellent intergranular corrosion resistance even after exposure to temperatures in the sensitization range (425-815°C).
Heat Treatment & Processing
MetalZenith's standard heat treatment involves solution annealing at 1040-1120°C followed by rapid cooling to retain the austenitic structure and ensure proper titanium carbide distribution. Our controlled atmosphere furnaces prevent surface oxidation and maintain optimal surface quality. Post-annealing pickling and passivation treatments enhance corrosion resistance and surface finish.
Manufacturing Process Excellence
Our production process begins with vacuum induction melting (VIM) using high-purity raw materials, followed by electroslag remelting (ESR) for enhanced cleanliness. Advanced ladle metallurgy ensures precise titanium addition and optimal inclusion control. Hot working is performed within carefully controlled temperature ranges to maintain austenitic structure integrity and prevent harmful phase formation.
Quality Standards & Compliance
MetalZenith maintains compliance with international standards including ASTM A240/A240M, EN 10088-2, and JIS G4305. Our quality management system encompasses incoming material inspection, in-process monitoring, final product testing, and comprehensive documentation. Advanced testing capabilities include optical emission spectroscopy, mechanical testing, corrosion testing per ASTM A262, ultrasonic inspection, and metallographic analysis.
Corrosion Resistance Performance
The titanium stabilization provides superior resistance to intergranular corrosion compared to standard 316 grade. Excellent performance in chloride environments, organic acids, and high-temperature oxidizing conditions. Pitting resistance equivalent number (PREN) of approximately 25, indicating good resistance to pitting and crevice corrosion in marine and chemical processing environments.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.08 |
| Manganese (Mn) | ≤ 2.00 |
| Silicon (Si) | ≤ 0.75 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 17.0 - 20.0 |
| Nickel (Ni) | 10.0 - 14.0 |
| Molybdenum (Mo) | 2.0 - 3.0 |
| Titanium (Ti) | 5×C min - 0.70 max |
| Nitrogen (N) | ≤ 0.10 |
| Iron (Fe) | Balance |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (Rm) | 515 - 690 MPa |
| Yield Strength (Rp0.2) | ≥ 205 MPa |
| Elongation (A5) | ≥ 40% |
| Reduction of Area (Z) | ≥ 60% |
| Hardness (HB) | ≤ 217 |
| Hardness (HRC) | ≤ 22 |
| Impact Energy (KV) at 20°C | ≥ 60 J |
| Fatigue Limit (107 cycles) | 240 MPa |
| Young's Modulus (E) | 200 GPa |
| Shear Modulus (G) | 81 GPa |
| Poisson's Ratio (ν) | 0.27 - 0.30 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density | 8.0 g/cm³ |
| Melting Point | 1400 - 1450°C |
| Thermal Conductivity at 20°C | 16.3 W/m·K |
| Thermal Conductivity at 100°C | 17.8 W/m·K |
| Thermal Expansion (20-100°C) | 16.0×10-6/K |
| Thermal Expansion (20-300°C) | 16.8×10-6/K |
| Specific Heat Capacity | 500 J/kg·K |
| Electrical Resistivity at 20°C | 0.74 µΩ·m |
| Magnetic Permeability | 1.02 µr (max) |
| Curie Temperature | Non-magnetic |
📏 Product Specifications
| Specification | Available Options |
|---|---|
| Product Forms | Bars, Rods, Plates, Sheets, Strips, Tubes, Pipes, Forgings, Castings |
| Bar Diameter Range | 6 mm - 300 mm |
| Plate Thickness Range | 3 mm - 150 mm |
| Sheet Thickness Range | 0.4 mm - 6 mm |
| Tube OD Range | 6 mm - 219 mm |
| International Standards | ASTM A240, A276, A312, A479, EN 1.4571, JIS SUS316Ti, GB/T 1220 |
| Surface Finishes | Hot Rolled, Cold Rolled, 2B, BA, No.4, HL, Mirror, Pickled |
| Dimensional Tolerances | ASTM, EN, JIS standard tolerances or custom requirements |
| Length Options | Standard lengths or cut-to-length as specified |
| Edge Conditions | Mill Edge, Slit Edge, Sheared Edge, Deburred |
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Our Advantages in Processing AISI 316Ti
Advanced Titanium Stabilization Technology
MetalZenith employs proprietary titanium addition techniques and precise temperature control during melting to achieve optimal Ti/C ratios between 4:1 to 6:1, ensuring complete carbide stabilization and preventing sensitization even during extended high-temperature exposure.
Comprehensive Intergranular Corrosion Testing
Our quality control laboratory performs complete ASTM A262 Practice A, B, C, E, and F testing on every heat, guaranteeing resistance to intergranular attack. Advanced metallographic analysis ensures proper titanium carbide precipitation and austenitic grain structure integrity.
Custom Alloy Modification & Processing
MetalZenith offers tailored chemical compositions and specialized processing routes including controlled cooling rates, solution annealing optimization, and custom mechanical property development to meet specific application requirements and performance criteria.
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