What Is a Seamless Stainless Steel TP316Ti Tube?
TP316Ti Seamless Stainless Steel Tube is supplied for titanium stabilization for resistance to sensitization at elevated temperature. The size range shown (OD 6–257 mm; WT 0.5–35 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 A213 / ASME SA213 or ASTM A269, subject to service. 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.
This seamless construction provides:
- Superior pressure resistance
- Enhanced structural integrity
- Minimised risk of weld-related defects or leakage (no longitudinal weld seam)
Why Choose TP316Ti Over 316L?
While 316L stainless steel is widely used for general corrosion resistance, it is prone to sensitization (chromium carbide precipitation) when exposed to temperatures between 425°C – 815°C (800°F – 1500°F).
TP316Ti solves this issue through titanium (Ti) stabilization:
- Titanium binds with carbon to form stable titanium carbides
- Limits chromium depletion at grain boundaries
- Helps maintain long-term corrosion resistance under thermal cycling
This makes TP316Ti tubing the preferred material for high-temperature process systems and critical corrosion applications.
Key Advantages of TP316Ti Seamless Tubes
1. Outstanding Intergranular Corrosion Resistance
Titanium stabilization strongly reduces carbide precipitation by binding carbon as stable titanium carbides, which limits chromium depletion at grain boundaries and supports durability after welding and prolonged high-temperature exposure; the degree of protection depends on the Ti/C ratio, welding practice and the service temperature range.
2. Superior Resistance to Pitting & Crevice Corrosion
With 2.0% – 2.5% molybdenum (Mo) content, TP316Ti performs exceptionally well in:
- Chloride-rich environments
- Acidic and marine conditions
3. Enhanced High-Temperature Mechanical Properties
Compared to 316/316L:
- Higher tensile and yield strength
- Improved creep resistance
- Better long-term thermal stability
4. Seamless High-Pressure Reliability
The absence of weld seams ensures:
- Higher allowable working pressure
- Increased safety factor in critical systems
- Excellent fatigue resistance
Product Specifications and Data
To provide a comprehensive overview of this high-performance material, here are the detailed technical specifications and performance data for Seamless Stainless Steel TP316Ti Tube.
The key to 316Ti’s performance is its precise composition, including the crucial addition of titanium.
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. Approximate or unconfirmed correspondences retain their qualification. See the grade designation index.
Chemical Composition
| 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 A213-25 / ASME SA213 Table 1, TP316Ti row ≤ heat-analysis acceptance limits. Confirm the values against the ordered edition and the MTC.
Grade 316Ti offers a balance of strength and ductility, making it a reliable solution for various industrial applications.
| Tensile Strength | Yield Strength | Elongation | Hardness |
|---|---|---|---|
| ≥ 515 MPa | ≥ 205 MPa | ≥ 35% | ≤ 192 HBW / 200 HV / 90 HRB |
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 Ω·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.
ASTM A1016/A1016M Tube Size Tolerance Chart
Size Tolerance Chart (mm)
| Specified Outside Diameter (OD) (Inches) | Permissible Variations in OD (± Inches) |
|---|---|
| 1⁄2 to 1 | ±0.005 |
| Over 1 to 1-1⁄2 | ±0.008 |
| Over 1-1⁄2 to 2 | ±0.010 |
| Over 2 to 2-1⁄2 | ±0.012 |
| Over 2-1⁄2 to 3-1⁄2 | ±0.014 |
| Over 3-1⁄2 to 5 | ±0.020 |
Tolerance basis: permitted variations per the governing specification stated on this page and the applicable general-requirements standard (ASTM A1016 / ASME SA1016) for the ordered product form; the wall-thickness and length variations in this section follow the same basis.
| Specified Outside Diameter (OD) (Inches) | Specified Wall Thickness (WT) (Inches) | Permissible Variation (± Inches) |
|---|---|---|
| 1⁄2 to 1 (Inclusive) | 0.025 to 0.065(Inclusive) | ±0.010 |
| Over 0.065to 0.134 (Inclusive) | ±0.012 | |
| Over 1 to 1-1⁄2 (Inclusive) | 0.025 to 0.065 (Inclusive) | ±0.010 |
| Over 0.065 to 0.134 (Inclusive) | ±0.012 | |
| Over 1-1⁄2 to 2 (Inclusive) | 0.025 to 0.049 (Inclusive) | ±0.011 |
| Over 0.049 to 0.083 (Inclusive) | ±0.012 | |
| Over 0.083 to 0.148 (Inclusive) | ±0.014 | |
| Over 2 to 2-1⁄2 (Inclusive) | 0.032 to 0.065 (Inclusive) | ±0.013 |
| Over 0.065 to 0.109 (Inclusive) | ±0.015 | |
| Over 0.109 to 0.165 (Inclusive) | ±0.017 | |
| Over 2-1⁄2 to 3-1⁄2 (Inclusive) | 0.032 to 0.165 (Inclusive) | ±0.020 |
| Over 0.165 to 0.220 (Inclusive) | ±0.025 | |
| Over 3-1⁄2 to 5 (Inclusive) | 0.083 to 0.165 (Inclusive) | ±0.025 |
| Over 0.165 to 0.220 (Inclusive) | ±0.030 |
Length Tolerance
For Specific Cut Lengths, the standard tolerance is +1⁄8 in. [3 mm], -0 in. [0 mm].
Important Note: The values presented here are based on the dimensional tolerance tables in ASTM A1016/A1016M (General Requirements for Ferritic Alloy Steel, Austenitic Alloy Steel, and Stainless Steel Tubes), contains other essential requirements like straightness and details for tubes with ODs outside of this range. Always consult the latest official standard for design and procurement.
Industrial Applications of TP316Ti Tubing
TP316Ti seamless tubing is widely used in industries requiring thermal stability and corrosion resistance:
Chemical & Petrochemical Processing
- Acid handling systems (sulfuric, phosphoric, organic acids)
- High-temperature pipelines
Heat Exchangers & Condensers
- Thermal cycling zones
- Corrosive heat transfer environments
Marine & Offshore Engineering
- Excellent resistance to chloride-induced stress corrosion cracking (SCC)
- Ideal for seawater and subsea systems
Automotive Exhaust Systems
- Withstands high-temperature exhaust gases
- Resistant to oxidation and thermal fatigue
Advanced Manufacturing Process & Quality Assurance
1. Hot Piercing & Billet Preparation
Uniform heating of 316Ti billets followed by precision piercing to produce a hollow mother tube.
2. Cold Pilgering / Cold Drawing
Multi-stage dimensional reduction ensures:
- Tight OD and wall thickness tolerances
- Superior surface finish (Ra ≤ 0.8 μm)
3. Solution Annealing Treatment
- Heating range: 1040°C – 1150°C
- Rapid water quenching
- Restores corrosion resistance and optimizes microstructure
4. Comprehensive Testing & Inspection
Non-Destructive Testing (NDT):
- Eddy Current Testing (ECT)
- Ultrasonic Testing (UT)
Destructive Testing:
- Flaring Test
- Flattening Test
- Intergranular Corrosion Test (ASTM A262 Practice E)
Frequently Asked Questions
What sizes are available for TP316Ti seamless tube?
The overall range is OD 6–257 mm; WT 0.5–35 mm. Requirements outside this range are reviewed against mill capability on request.
Which specification governs TP316Ti seamless tube?
ASTM A213 / ASME SA213 or ASTM A269, subject to service is the governing specification for TP316Ti seamless tube. 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 size (OD and wall or schedule), 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 pipe form, see the TP316Ti seamless pipe. To compare other grades and size combinations, browse the Stainless Steel Seamless Pipe category. Minimum order quantity and lead time are confirmed on enquiry against the ordered grade, size and quantity.
