Stainless Steel 316Ti
Stainless Steel 316Ti (UNS S31635 / EN 1.4571) – Specifications, Properties and Applications
Stainless Steel 316Ti (UNS S31635 / EN 1.4571) is a titanium-stabilized austenitic stainless steel based on the 316 grade. It contains molybdenum for enhanced resistance to pitting and crevice corrosion and titanium for improved resistance to sensitization during prolonged exposure to elevated temperatures.
The addition of titanium stabilizes the carbon in the steel and reduces the tendency for chromium carbide precipitation under certain thermal conditions. This makes 316Ti suitable for equipment exposed to elevated temperatures and applications where corrosion resistance and metallurgical stability are important.
Stainless Steel 316Ti is widely used in chemical processing, petrochemical plants, power generation, heat exchangers, industrial piping, marine equipment, water treatment, and pharmaceutical industries.
Emirerri Steel supplies Stainless Steel 316Ti in sheets, plates, coils, pipes, tubes, round bars, flanges, and pipe fittings for customers across Tunisia, Algeria, Morocco, Libya, and international markets.
Key Features
- Excellent general corrosion resistance
- Excellent resistance to pitting corrosion
- Good resistance to crevice corrosion
- Good resistance to chloride-containing environments
- Titanium-stabilized structure
- Improved resistance to sensitization
- Good high-temperature stability
- Excellent mechanical strength
- Good weldability
- Good formability
- Long service life
- Low maintenance requirements
Stainless Steel 316Ti Specifications
| Specification | Details |
|---|---|
| Grade | Stainless Steel 316Ti |
| UNS Number | S31635 |
| Werkstoff Number | 1.4571 |
| EN Designation | X6CrNiMoTi17-12-2 |
| Stainless Steel Family | Austenitic Stainless Steel |
| Stabilizing Element | Titanium (Ti) |
| Common Standards | ASTM A240, ASTM A276, ASTM A312, ASTM A182, EN 10088 |
| Supply Condition | Solution Annealed |
| Surface Finishes | No.1, 2B, BA, No.4, Mirror |
| Product Forms | Sheet, Plate, Coil, Pipe, Tube, Round Bar, Flanges, Pipe Fittings |
Equivalent Grades of Stainless Steel 316Ti
| Standard | Equivalent Grade |
|---|---|
| ASTM / UNS | S31635 / 316Ti |
| EN | 1.4571 |
| DIN | X6CrNiMoTi17-12-2 |
| JIS | SUS316Ti* |
| ISO | X6CrNiMoTi17-12-2 |
*The exact equivalent should be confirmed according to the product form and applicable standard.
Available Sizes
Sheets & Plates
Thickness: 0.5 to 100 mm
Width: Up to 2500 mm
Length: Up to 12000 mm
Pipes & Tubes
Outside Diameter: 6 to 610 mm
Wall Thickness: 0.5 to 40 mm
Round Bars
Diameter: 6 to 500 mm
Available dimensions may vary according to product form, manufacturing standard, supply condition, and project requirements.
Chemical Composition of Stainless Steel 316Ti
| Element | Composition (%) |
|---|---|
| Chromium (Cr) | 16.0 – 18.0 |
| Nickel (Ni) | 10.0 – 14.0 |
| Molybdenum (Mo) | 2.0 – 3.0 |
| Titanium (Ti) | ≥ 5 × C and ≤ 0.70 |
| Carbon (C) | ≤ 0.08 |
| Manganese (Mn) | ≤ 2.00 |
| Silicon (Si) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Nitrogen (N) | ≤ 0.10 |
| Iron (Fe) | Balance |
Mechanical Properties of Stainless Steel 316Ti
Values can vary according to the product form and applicable standard.
| Property | Typical / Minimum Value |
|---|---|
| Tensile Strength | ≥ 515 MPa |
| Yield Strength (0.2% Offset) | ≥ 205 MPa |
| Elongation | ≥ 40% |
| Hardness | ≤ 215 HB |
| Modulus of Elasticity | ≈ 200 GPa |
Physical Properties of Stainless Steel 316Ti
| Property | Approximate Value |
|---|---|
| Density | 8.00 g/cm³ |
| Melting Range | ≈ 1370 – 1400°C |
| Thermal Conductivity | ≈ 16 W/m·K |
| Specific Heat Capacity | ≈ 500 J/kg·K |
| Magnetic Permeability | Low in Annealed Condition |
Types of Stainless Steel 316Ti Products
Stainless Steel 316Ti Sheets & Plates
Used for chemical tanks, pressure vessels, heat-processing equipment, and industrial fabrication.
Stainless Steel 316Ti Pipes & Tubes
Suitable for process piping, petrochemical plants, chemical transportation, and high-temperature fluid systems.
Stainless Steel 316Ti Heat Exchanger Tubes
Used in heat exchangers, condensers, cooling systems, and thermal-processing equipment.
Stainless Steel 316Ti Round Bars
Used for shafts, valves, pumps, fasteners, machined components, and industrial machinery.
Stainless Steel 316Ti Flanges & Pipe Fittings
Designed for piping systems operating in corrosive and elevated-temperature environments.
Corrosion Resistance
Stainless Steel 316Ti offers excellent resistance to:
- General corrosion
- Pitting corrosion
- Crevice corrosion
- Chloride-containing environments
- Marine atmospheres
- Many industrial chemicals
- Oxidizing environments
The molybdenum content improves localized corrosion resistance compared with 304 stainless steel.
The titanium stabilization helps reduce the risk of sensitization under appropriate thermal exposure, supporting corrosion resistance in certain welded or high-temperature applications.
Heat Resistance
Stainless Steel 316Ti offers good oxidation resistance and metallurgical stability at elevated temperatures.
Key Benefits
- Good oxidation resistance
- Good high-temperature stability
- Good resistance to creep under appropriate conditions
- Good resistance to thermal cycling
- Improved resistance to sensitization compared with unstabilized grades under suitable exposure conditions
For prolonged exposure to extremely high temperatures, specialized heat-resistant grades such as Stainless Steel 310S may be more suitable.
Heat Treatment
Solution Annealing
Temperature: Generally 1020 – 1120°C
Cooling: Rapid cooling according to the applicable product specification
Objectives
Restore corrosion resistance
Homogenize the microstructure
Improve ductility
Reduce internal stresses
Optimize material properties
Stainless Steel 316Ti cannot be hardened by conventional heat treatment but can be strengthened through cold working.
Welding of Stainless Steel 316Ti
Stainless Steel 316Ti has good weldability using conventional welding processes.
Recommended Welding Methods
- GTAW / TIG
- GMAW / MIG
- SMAW
- SAW
- Orbital Welding
- Resistance Welding
Welding Advantages
- Good weld quality
- Good mechanical strength
- Good corrosion resistance
- Improved metallurgical stability due to titanium stabilization
Welding procedures should be selected according to material thickness, welding process, service conditions, filler metal, and applicable project standards.
Post-weld cleaning, pickling, and passivation may be required to restore the surface condition and corrosion resistance.
Fabrication of Stainless Steel 316Ti
Machining
- Turning
- Milling
- Drilling
- Threading
Forming
- Cold bending
- Roll forming
- Press forming
- Deep drawing
Cutting
- Laser cutting
- Plasma cutting
- Waterjet cutting
- Mechanical sawing
Surface Finishing
- Pickling
- Passivation
- Mechanical polishing
- Electropolishing
- Brushing
Applications
Chemical Industry
- Chemical reactors
- Storage tanks
- Process piping
- Pressure vessels
- Chemical processing equipment
Petrochemical Industry
- Refineries
- Heat exchangers
- Process piping
- Petrochemical processing equipment
Power Generation
- Thermal equipment
- Cooling systems
- Industrial piping
- Auxiliary equipment
Marine Industry
- Offshore equipment
- Marine piping
- Shipbuilding components
- Port equipment
Pharmaceutical Industry
- Storage vessels
- Production equipment
- Process piping
- Hygienic equipment
Water Treatment
- Water treatment equipment
- Filtration systems
- Piping systems
- Desalination equipment
Stainless Steel 316Ti for Tunisia, Algeria, Morocco & Libya
Stainless Steel 316Ti is suitable for industrial projects across Tunisia, Algeria, Morocco, and Libya where corrosion resistance, mechanical strength, and stability during elevated-temperature service are required.
It can be used in oil & gas, petrochemical, chemical processing, power generation, water treatment, marine, pharmaceutical, and industrial process applications.
For project selection, the final material grade, dimensions, product form, and applicable standard should be determined according to operating temperature, pressure, process fluid, chloride concentration, welding requirements, and project specifications.
Conclusion
Stainless Steel 316Ti (UNS S31635 / EN 1.4571) is a titanium-stabilized molybdenum-bearing austenitic stainless steel that combines excellent corrosion resistance with good mechanical strength and improved metallurgical stability during elevated-temperature exposure.
Its resistance to pitting and crevice corrosion, combined with titanium stabilization, makes it a reliable material for demanding chemical, petrochemical, marine, energy, water-treatment, and industrial applications.
Available in sheets, plates, pipes, tubes, round bars, flanges, and pipe fittings, Stainless Steel 316Ti provides dependable performance for industrial projects across Tunisia, Algeria, Morocco, Libya, and international markets.