What Is a Seamless Stainless Steel TP317L Tube?
TP317L Seamless Stainless Steel Tube is supplied for low-carbon weldability with higher molybdenum than 316L. 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 A269 or ASTM A213 / ASME SA213, 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.
Manufactured in accordance with ASTM A213 / ASTM A269 standards, TP317L seamless tubes are produced from solid billets through hot piercing and cold drawing processes. This ensures:
- No longitudinal weld seam
- Uniform grain structure
- Superior mechanical integrity under pressure
The “L” (Low Carbon ≤ 0.03%) designation minimizes carbide precipitation during welding, effectively preventing intergranular corrosion in the heat-affected zone (HAZ).
With an increased Molybdenum (Mo) content of 3.0%–4.0%, TP317L offers significantly improved resistance to:
- Pitting corrosion
- Crevice corrosion
- Chloride-induced attack
Compared to TP304L and TP316L, TP317L is the preferred material for severe chemical processing environments.
Key Advantages of TP317L Seamless Tubes
1. Superior Pitting Resistance (High PREN Value)
Enhanced chromium and molybdenum content increases the Pitting Resistance Equivalent Number (PREN), making TP317L ideal for chloride-rich environments.
2. Excellent Intergranular Corrosion Resistance
The low carbon composition reduces the need for post-weld heat treatment in many applications; whether PWHT is required is governed by the project specification and the welding procedure.
3. High Structural Reliability
Seamless manufacturing ensures:
- Higher pressure resistance
- Better fatigue strength
- Consistent performance under thermal cycling
4. Outstanding Chemical Resistance
Particularly suitable for:
- Dilute sulfuric acid
- Phosphoric acid
- Organic acids
- Industrial flue gas 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 Seamless Stainless Steel TP317L Tube.
Equivalent Grade
| UNS | Common grade name | EN material number | EN steel name | JIS grade | GB/T grade |
|---|---|---|---|---|---|
| S31703 | 317L | 1.4438 | X2CrNiMo18-15-4 | SUS317L | 022Cr19Ni13Mo3 / 00Cr19Ni13Mo3 |
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
The composition of Stainless Steel TP317L is carefully balanced to achieve its superior corrosion resistance and high strength.
| C | Si | Mn | P | S | Cr | Ni | Mo |
|---|---|---|---|---|---|---|---|
| ≤0.035 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.030 | 18.00–20.00 | 11.00–15.00 | 3.00–4.00 |
Data source: ASTM A213-25 / ASME SA213 Table 1, TP317L row ≤ heat-analysis acceptance limits. Confirm the values against the ordered edition and the MTC.
Stainless Steel TP317L is specifically designed to maintain its strength and shape in high-stress, corrosive environments.
| 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 under a wide range of conditions.
| Density | Melting Point | Thermal Expansion | Thermal Conductivity | Modulus of Elasticity | Electrical Resistivity |
|---|---|---|---|---|---|
| 8.0 g/cm³ | 1398 -1454 °C | 16.6 μm/m·°C (20-100°C) | 16.3 W/m·K (20°C) | 193 GPa | 0.74 × 10⁻⁶ 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.
Common Industrial Applications
TP317L seamless tubes are widely used in industries requiring maximum corrosion resistance and operational reliability:
Chemical Processing
Heat exchangers, reactors, acid transfer pipelines
Pulp & Paper Industry
Bleaching systems, FGD units
Oil & Gas Industry
Sour gas pipelines, offshore seawater cooling systems
Food & Pharmaceutical
High-purity pipelines, sterilization systems
Quality Assurance & Testing
Testing scope is agreed on the purchase order and carried out against the ordered standard:
- Mill Test Certificate (MTC): EN 10204 3.1 as standard; 3.2 by arrangement
Why Choose Our TP317L Seamless Tubes?
As a professional manufacturer of stainless steel seamless pipes and tubes, we offer:
- Advanced piercing and cold drawing technology
- Precision solution annealing treatment
- Strict quality traceability system
- Compliance with ASTM, ASME, and EN standards
Our TP317L tubes are engineered to deliver:
- Long service life
- Reduced maintenance cost
- Maximum reliability in harsh environments
Frequently Asked Questions
What sizes are available for TP317L 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 TP317L seamless tube?
ASTM A269 or ASTM A213 / ASME SA213, subject to service is the governing specification for TP317L 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 TP317L 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.
