ASTM A269 TP316Ti Stainless Steel Tubes (UNS S31635)
ASTM A269 TP316Ti is a titanium-stabilized version of 316 stainless steel designed for enhanced resistance to intergranular corrosion, especially after welding or long-term exposure to high temperatures. The addition of titanium (Ti) improves stability against carbide precipitation, ensuring excellent performance in elevated-temperature environments, aggressive chemical media, and high-pressure systems.
Known for superior corrosion resistance, oxidation resistance, and durability, 316Ti (UNS S31635) stainless steel tubes are widely used in chemical processing, heat exchangers, petrochemical plants, and high-temperature service applications.
Key Features
- Titanium Stabilized for excellent resistance to sensitization during welding.
- Superior High-Temperature Strength compared to standard 316/316L grades.
- Enhanced Corrosion Resistance in chloride-containing and acidic environments.
- Excellent Mechanical Stability under prolonged heat exposure.
- Smooth & Clean Inner Surface ideal for critical fluid and gas flow.
- High Oxidation Resistance up to 800°C.
- Meets ASTM A269 Standard ensuring dimensional accuracy and quality.
Equivalent Grades
| Standard | Grade |
|---|---|
| ASTM / ASME | 316Ti / UNS S31635 |
| EN / DIN | 1.4571 / X6CrNiMoTi17-12-2 |
| JIS | SUS316Ti |
| ISO | 316Ti |
Available Sizes
- Outside Diameter (OD): 6 mm – 101.6 mm
- Wall Thickness: 0.5 mm – 8 mm
- Length: Up to 6 meters (custom lengths available)
- Special non-standard sizes available on request.
ASTM A269 TP316Ti Chemical Composition (UNS S31635)
| Element | Percentage (%) |
|---|---|
| Carbon (C) | ≤ 0.08 |
| Chromium (Cr) | 16.0 – 18.0 |
| Nickel (Ni) | 10.0 – 14.0 |
| Molybdenum (Mo) | 2.0 – 3.0 |
| Titanium (Ti) | ≥ 5 × C (typically 0.5%) |
| Manganese (Mn) | ≤ 2.0 |
| Silicon (Si) | ≤ 1.0 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Nitrogen (N) | ≤ 0.10 |
| Iron (Fe) | Balance |
ASTM A269 TP316Ti Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 520 MPa |
| Yield Strength (0.2% Proof) | ≥ 210 MPa |
| Elongation | ≥ 40% |
| Hardness (Rockwell B) | ≤ 95 HRB |
Physical Properties
| Property | Value |
|---|---|
| Density | 8.00 g/cm³ |
| Melting Point | 1370 – 1400°C |
| Thermal Conductivity | 16.3 W/m·K at 100°C |
| Electrical Resistivity | 0.74 µΩ·m |
| Specific Heat | 500 J/kg·K |
| Modulus of Elasticity | 193 GPa |
Types of ASTM A269 TP316Ti Tubes
- Seamless Tubes
- Welded Tubes
- Cold Drawn Tubes
- Instrumentation Tubes
- Heat Exchanger Tubes
- Sanitary / Hygienic Tubes
- U-Tubes
- Polished Structural Tubes
Applications
- Chemical & Petrochemical Processing
- Heat Exchangers & Condensers
- Oil & Gas Refineries
- Power Generation and Boilers
- Food & Pharmaceutical Processing Lines
- Marine & Offshore Applications
- High-Temperature Piping Systems
- Furnace & Heater Tubing
- Acidic & Chloride-Rich Environments
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