What is Seamless Stainless Steel TP316Ti Pipe?
TP316Ti Seamless Stainless Steel Pipe is supplied for titanium stabilization for resistance to sensitization at elevated temperature. The size range shown (OD 6–1016 mm; WT 0.5–65 mm) is the overall capability across this product family, not a per-grade commitment. Confirm the specific OD × WT × length combination for the ordered grade in the quotation. The governing specification must be stated on the purchase order: ASTM A312 / ASME SA312. Chemistry, mechanical properties, heat treatment, dimensional tolerance, NDT and certification must be reported against the ordered standard and material heat; do not treat typical values as guaranteed acceptance limits.
Unlike 316L stainless steel, which relies on low carbon content, TP316Ti incorporates titanium (Ti) as a stabilizing element. Titanium preferentially reacts with carbon to form stable titanium carbides, which limits chromium carbide precipitation at grain boundaries during prolonged exposure to temperatures between 425°C – 815°C (800°F – 1500°F).
This makes TP316Ti seamless pipe the preferred choice for high-temperature and corrosive applications where 316L may fail due to sensitization.
Key Advantages of TP316Ti Seamless Pipe
1. Excellent Resistance to Intergranular Corrosion
Titanium stabilization greatly reduces the risk of sensitization after welding or thermal cycling by binding carbon as stable titanium carbides, supporting long-term corrosion resistance; the level of protection achieved depends on the Ti/C ratio, welding practice and the service temperature range.
2. Superior Pitting and Crevice Corrosion Resistance
With 2.0% – 2.5% molybdenum content, TP316Ti offers enhanced protection in chloride-rich and marine environments.
3. High-Temperature Strength and Stability
Compared to 316L, TP316Ti provides:
- Higher tensile and yield strength
- Improved creep resistance
- Better performance under continuous high-temperature exposure
4. Seamless Manufacturing Integrity (ASTM A312)
Produced via seamless processes, TP316Ti pipes:
- Have no longitudinal weld seam, removing the weld-quality risk associated with welded pipe
- Support high-pressure applications, with the design pressure determined by the applicable code and the allowable stress of the grade
- Offer consistent structural reliability in critical systems
Product Specifications and Data
To provide a comprehensive overview of this high-performance material, here are the detailed technical specifications and performance data for TP316Ti stainless steel.
Equivalent Grade
| UNS | Common grade name | EN material number | EN steel name | JIS grade | GB/T grade |
|---|---|---|---|---|---|
| S31635 | 316Ti | 1.4571 | X6CrNiMoTi17-12-2 | SUS316Ti | 06Cr17Ni12Mo2Ti |
Grade correspondence does not make ASTM, ASME, EN, JIS and GB delivery requirements interchangeable. Confirm chemistry, heat treatment, mechanical properties, dimensions, testing and certification against the purchase specification. See the grade designation index.
Chemical Composition
The key to 316Ti’s performance is its precise composition, including the crucial addition of titanium.
| C | Si | Mn | P | S | Cr | Ni | Mo | N | Ti | Fe |
|---|---|---|---|---|---|---|---|---|---|---|
| ≤ 0.08 | ≤ 0.75 | ≤ 2.00 | ≤ 0.045 | ≤ 0.030 | 16.00 – 18.00 | 10.00 – 14.00 | 2.00 – 3.00 | ≤ 0.10 | 5×(C+N) – 0.70 | Bal |
Data source: ASTM A312-25 / ASME SA312 Table 1, TP316Ti row ≤ heat-analysis acceptance limits. Confirm the values against the ordered edition and the MTC.
Typical Mechanical Properties
Grade 316Ti offers a balance of strength and ductility, making it a reliable solution for various industrial applications.
| Tensile Strength | Yield Strength | Elongation | Rockwell Hardness | Brinell Hardness |
|---|---|---|---|---|
| ≥ 515 MPa | ≥ 205 MPa | ≥ 35% | ≤ 95 HRB | ≤ 217 HB |
Note: Typical values for reference only — not acceptance limits. Mechanical properties are reported on the MTC against the ordered standard, product form, condition and test temperature.
Typical Physical Properties
These physical properties highlight the material’s ability to perform reliably across a range of environments.
| Density | Melting Point | Thermal Expansion | Thermal Conductivity | Modulus of Elasticity | Electrical Resistivity |
|---|---|---|---|---|---|
| 8.0 g/cm3 | 1370-1400 °C | 16.5 μm/m·°C (20-100°C) | 15.2 W/m·K (100°C) | 193 GPa | 7.4 × 10-7 2:m (20°C |
Note: Typical values for reference only — not acceptance limits. Physical and mechanical properties are reported on the MTC against the ordered standard, product form and condition.
Size Tolerance Chart (mm)
| NPS Designator (Inches) | Permissible Variations in Outside Diameter (Inches) |
| 1⁄8 to 1 1⁄2, inclusive | Over: 1⁄64 in. (0.015 in.) |
| Under: 1⁄32 in. (0.031 in.) | |
| Over 1 1⁄2 to 4, inclusive | Over: 1⁄32 in. (0.031 in.) |
| Under: 1⁄32 in. (0.031 in.) | |
| Over 4 to 8, inclusive | Over: 1⁄16 in. (0.062 in.) |
| Under: 1⁄32 in. (0.031 in.) | |
| Over 8 to 18, inclusive | Over: 3⁄32 in. (0.093 in.) |
| Under: 1⁄32 in. (0.031 in.) | |
| Over 18 to 26, inclusive | Over: 1⁄8 in. (0.125 in.) |
| Under: 1⁄32 in. (0.031 in.) | |
| Over 26 to 34, inclusive | Over: 5⁄32 in. (0.156 in.) |
| Under: 1⁄32 in. (0.031 in.) | |
| Over 34 to 48, inclusive | Over: 3⁄16 in. (0.187 in.) |
| Under: 1⁄32 in. (0.031 in.) |
Tolerance basis: permitted variations per the governing specification stated on this page and the applicable general-requirements standard (ASTM A999 / ASME SA999) for the ordered product form; the wall-thickness and length variations in this section follow the same basis.
The wall thickness tolerances are defined by the nominal wall thickness (t) and the outside diameter (D).
1. Minimum Wall Thickness
The minimum wall thickness at any point on the pipe shall not be more than {12.5%} under the nominal (specified) wall thickness.
2. Maximum Wall Thickness (Percentage Over Nominal)
The maximum allowable wall thickness variation depends on the size and the t/D ratio (ratio of nominal wall thickness to ordered outside diameter):
| NPS Designator (Inches) | t/D Ratio | Permissible Variation (Over Nominal WT) |
| 1/8 to 2, inclusive | All ratios | +20.0% |
| 3 to 18, inclusive | t/D ≤ 5% | +22.5% |
| 3 to 18, inclusive | t/D >5% | +15.0% |
| 20 and larger (Seamless) | t/D ≤ 5% | +22.5% |
| 20 and larger (Seamless) | t/D >5% | +15.0% |
| 20 and larger (Welded) | All ratios | +17.5% |
For pipe ordered to a Specific Cut Length, the standard tolerance is +1⁄8 in. [3.2 mm], -0 in. [0 mm].
Pipe is typically supplied in Single Random Lengths (17 to 24 ft) or Double Random Lengths (38 to 40 ft), unless otherwise specified.
Disclaimer: These tolerances are based on ASTM A999/A999M general dimensional requirements commonly referenced by ASTM A312 and ASTM A790. The full and most current specification document must always be consulted for official design and procurement purposes.
Applications of TP316Ti Seamless Stainless Steel Pipe
Thanks to its outstanding resistance to heat and corrosion, TP316Ti pipe is widely used in:
Chemical & Petrochemical Industry
Handling sulfuric, phosphoric, and organic acids
High-temperature process pipelines
Heat Exchangers & Condensers
Ideal for thermal cycling zones
Resistant to scaling and corrosion
Marine & Offshore Engineering
Excellent resistance to chloride-induced stress corrosion cracking (SCC)
Suitable for subsea pipelines and seawater systems
Pharmaceutical & Food Processing
High purity and contamination-free performance
Suitable for sterilization and hygienic systems
Frequently Asked Questions
What sizes are available for TP316Ti seamless pipe?
The overall range is OD 6–1016 mm; WT 0.5–65 mm. Requirements outside this range are reviewed against mill capability on request.
Which specification governs TP316Ti seamless pipe?
ASTM A312 / ASME SA312 is the governing specification for TP316Ti seamless pipe. The edition in force at order time is stated on the quotation and purchase order; chemistry, mechanical properties, heat treatment, dimensions and testing are reported against the ordered standard and material heat.
What inspection documents are provided?
Each order is documented with a mill test certificate stating heat chemistry and mechanical test results. EN 10204 3.1 certification, hydrostatic testing, eddy-current or ultrasonic inspection and PMI are performed when specified in the purchase order.
Technical review: page data reviewed by the Xinzhe technical desk on 2026-09-27. Chemistry acceptance limits are compiled from the governing ASTM/ASME specification stated on this page; mechanical and physical values are typical reference data and are not acceptance guarantees. Values must be confirmed against the standard edition in force at order time and the material test certificate.
Ready to Request a Quotation?
Send the NPS and schedule (or actual OD and wall), quantity, length, end finish and the inspection items you need as acceptance criteria — you will get a written quotation stating the specification and edition, delivery condition, documents included and lead time.
For the same grade in tube form, see the TP316Ti seamless tube. To compare other grades and size combinations, browse the Stainless Steel Seamless Tube category. Minimum order quantity and lead time are confirmed on enquiry against the ordered grade, size and quantity.
