ASTM A249 TP317 Stainless Steel Welded Tubes
Material Grade:TP317 / UNS S31700
Standard:ASTM A249 / ASME SA249
Manufacturing Process:Cold Rolled / Welded
Outer Diameter (OD):6.0mm-219.1 mm
Wall Thickness:0.5mm-6.0mm
Length:3000–24000 mm; Custom lengths available
Surface Finish:2B, BA, No. 4, No. 8, Polished
Heat Treatment:Solution Annealing
Welding Method:TIG / Laser / High-Frequency Welding
Heat Treatment Temperature:Typically ≥1040°C, followed by rapid cooling
Inspection Documents:Mill Test Certificate (MTC), EN 10204 3.1 available
Packing:Wooden Cases, Bundles, Waterproof Paper, PVC/PE Protection
Send E-mail:info@gneestainless.com
Tel:+8615824687445
Description
Gnee Steel (Tianjin) Co., Ltd. is one of the most professional manufacturers and suppliers of astm a249 tp317 stainless steel welded tubes in China. With abundant experience, we warmly welcome you to wholesale customized astm a249 tp317 stainless steel welded tubes from our factory. For price consultation, contact us.
If you are looking for highly corrosion-resistant heat exchanger tubing capable of long-term, stable operation in harsh media such as strong acids and high chloride environments, ASTM A249 TP317 stainless steel welded tubing is an ideal choice superior to traditional 316L. It is specifically designed for equipment with stringent thermal efficiency and corrosion resistance requirements, including boilers, superheaters, heat exchangers, and condensers.
The molybdenum (Mo) content of ASTM A249 TP317 stainless steel tubing reaches 3.0%–4.0%, with chromium (Cr) content at 18.0%–20.0% and nickel (Ni) content at 11.0%–15.0%. Featuring a Pitting Resistance Equivalent Number (PREN) of 28–30, its corrosion resistance in chloride-bearing solutions, wet chlorine gas, sulfuric acid, and organic acid media is enhanced by 20%–30% compared to 316L.
Additionally, the low-carbon control of TP317L (C ≤ 0.030%) effectively suppresses chromium carbide precipitation in the heat-affected zone (HAZ) during welding, eliminating sensitization risks. With a minimum tensile strength of 515 MPa, a minimum yield strength of 205 MPa, and a minimum elongation of 35%, it delivers excellent ductility and formability while fully satisfying mechanical strength requirements.
ASTM A249 TP317 welded tube manufacturer
GNEE supplies ASTM A249 TP317 welded tubing tailored to customer drawings, operating conditions, and procurement standards. We offer standard and non-standard sizes with outer diameters ranging from 6.0 mm to 219.1 mm and wall thicknesses from 0.5 mm to 6.0 mm, with single tube lengths up to 24 m. Custom cut-to-length services and U-bend tube annealing processing are also available. Throughout production, we strictly control forming, longitudinal seam welding, heat treatment, dimensional tolerances, and surface quality. Based on order specifications, hydrostatic testing or mandatory non-destructive testing (NDT) can be conducted to ensure on-time, high-quality delivery for critical engineering projects in global chemical, paper manufacturing, and seawater desalination industries.
What is the difference between TP317 and TP317L?
TP317: Maximum carbon content is 0.08%.
TP317L: Maximum carbon content is 0.03%. "L" stands for Low Carbon.
Difference: TP317L has better resistance to intergranular corrosion after welding because it reduces carbide precipitation in the weld heat-affected zone. TP317L is generally preferred for applications requiring a large number of welds.
TP317 Stainless Steel Tube Specifications
ASTM A249 TP317 Stainless Steel Welded Tubes Equivalent Grades
| STANDARD | UNS | WERKSTOFF NR. |
| SS 317 | S31700 | 1.4449 |
ASTM A249 TP317 Round pipe Chemical Composition
| Element | TP317 (wt %) |
|---|---|
| C | ≤0.08 |
| Mn | ≤2.00 |
| Si | ≤1.00 |
| P / S | ≤0.045 / ≤0.030 |
| Cr | 18.0-20.0 |
| Ni | 11.0-15.0 |
| Mo | 3.0-4.0 |
ASTM A249 TP317 pipe Mechanical Properties
| Property | Value (Imperial) | Value (Metric) |
| Tensile Strength, min. | 75 ksi | 515 MPa |
| Yield Strength (0.2% Offset), min. | 30 ksi | 205 MPa |
| Elongation (in 2in. or 50mm), min. | 35% | 35% |
| Rockwell Hardness, max. | 90 HRB | - |
| Brinell Hardness, max. | - | 192 HBW |
ASTM A249 stainless steel welded pipe Dimensional Tolerances
Tolerances for Outside Diameter (OD) and Wall Thickness (WT) as per standard specifications.
| Outside Diameter (OD) Range | OD Tolerance | Wall Thickness (WT) Tolerance |
| ≤ 1.000" (25.4 mm) | ± 0.004" (0.10 mm) | ± 10% |
| > 1.000" to 1.500" (38.1 mm) | ± 0.006" (0.15 mm) | ± 10% |
| > 1.500" to 2.000" (50.8 mm) | ± 0.008" (0.20 mm) | ± 10% |
| > 2.000" to 2.500" (63.5 mm) | ± 0.010" (0.25 mm) | ± 10% |
| > 2.500" to 3.000" (76.2 mm) | ± 0.012" (0.30 mm) | ± 10% |
Does ASTM A249 TP317 tubing require heat treatment?
Yes. According to ASTM A249, all tubing must undergo solution annealing after welding. This typically involves heating to above 1900°F (1040°C) and rapid quenching to relieve welding stress and restore the material's corrosion resistance.
What is TP317 stainless steel used for?
Chemical and petrochemical processing equipment;
Power generation boilers and superheater systems;
Pulp and paper facilities handling highly corrosive bleaching solutions;
Condensers and marine heat exchangers.
What is the price of ASTM A249 TP317 tubing?
The wholesale price of ASTM A249 TP317 Welded Stainless Steel Tubing generally ranges from $3,500 to $6,500 per metric ton (approximately $3.50 to $6.50 per kg) when purchased in bulk volume from global suppliers. If you are buying individual custom lengths or small quantities from industrial retail distributors, retail prices typically span from $3.50 to $12.00 per foot, heavily depending on the tube's outer diameter (OD) and wall thickness.
If you need assistance, please let me know:
Are you looking for specific dimensions (outer diameter and wall thickness)?
Do you need a quote for a particular quantity or length?
Are you searching for certified mill test reports or specific surface finishes?
317 SS Welded Tubes inspection
Every batch of pipes undergoes 100% eddy current testing (ET) or hydrostatic testing; intergranular corrosion testing (ASTM A262 Practice E), flattening/flaring tests, and metallographic examinations can also be provided upon request.
PACKAGING AND SHIPPING
| Hexagonal Bundles | Standard OD & Heavy wall | Tied with steel straps at multiple locations. Typically wrapped in woven bags or PVC sheets. |
| Wooden Crates / Cases | Thin wall or Small OD | Provides the best protection against bending and external impact. IPPC treated wood for export. |
| U-Tube Cages | U-bent tubes | Specific steel or wooden frames to secure the "U" bend portion during transit. |
FAQ
What is the difference between ASTM A249 and ASTM A269?
A249: Specifically designed for heat exchange equipment such as boilers and pressure vessels, emphasizing weld strength and safety under pressure. It must include mechanical tests such as flattening and flaring.
A269: Designed for general industrial services (such as laboratory equipment and general piping), it does not necessarily require complex mechanical strength tests and is typically used for instrument tubing or general decorative/structural applications.
What is the maximum operating temperature for TP317?
In terms of oxidation resistance, TP317 can be used intermittently at temperatures up to 1600°F (870°C) and continuously at 1700°F (925°C). However, as a pressure-bearing component, its design temperature typically follows the ASME Boiler and Pressure Vessel Code (generally recommended below 1000°F/538°C to avoid significant strength degradation).
Can TP317 welded tubes be bent or fabricated?
Yes. Due to its good plasticity (elongation ≥ 35%), TP317 tubing is suitable for U-bending and is often used in heat exchanger tube bundles.
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