Stainless steel 317 tubes are austenitic chromium nickel molybdenum tubes made from UNS S31700 (AISI Type 317, grade TP317 in the ASTM tube specifications). The grade is a higher alloyed version of 316. It holds 18.0 to 20.0% chromium and 11.0 to 15.0% nickel, with 3.0 to 4.0% molybdenum against 2.0 to 3.0% in 316. The additional amount of molybdenum makes 317 less vulnerable to pitting and crevice corrosion in chloride and acidic environments where grades with a lower level of alloying start to wear out. SS 317 tube is produced in its seamless form according to ASTM A213 TP317 standards for heat exchanger and boiler coils, in welded form according to ASTM A249 TP317 standards for heat exchanger and condenser pipes, and in seamless or welded form according to ASTM A269 TP317 standards for general corrosion and process piping.
USA Piping Solution supplies stainless steel 317 tubes from stock and cut to length, with full traceability and EN 10204 3.1 mill test reports on every lot. Third party inspection is available on request.
Stainless Steel 317 Tube Specification
| Pipe Specifications | ASTM A312, A358 / ASME SA312, SA358 |
| Tube Specifications | ASTM A213, A269, A249, A511, A554 / ASME SA213, SA269, SA249, SA511, SA554 |
| Dimensions | ANSI/ASME B36.19M, ANSI/ASME B36.10M |
| Seamless Pipe & Tube Size | 1/2″ NB – 16″ NB |
| Welded Pipe & Tube Size | 1/8″NB TO 30″NB IN |
| EFW Pipe & Tube Size | 6″ NB – 24″ NB |
| Tube Outside Diameter | 6.00 mm OD up to 914.4 mm OD, Sizes up to 24” NB available Ex-stock, OD Size Steel Tubes available Ex-stock |
| Thickness | 0.35 mm – 50 mm |
| Specialized in | Large Diameter Pipe Size |
| Schedule | SCH5, SCH10, SCH20, SCH30, SCH40, STD, SCH80, SCH 80S, SCH60, SCH80, SCH120, SCH140, SCH160, SCH XXS, SCH XS |
| Type | Seamless Pipes, ERW Pipes, Welded Pipe, Fabricated Pipes, Electropolished Pipe, Polished Pipe, Hollow Pipes |
| Form | Round, Square, Hydraulic, U Shape, Rectangular, Pan Cake Coils, Coiled, Hex, Honed, Etc |
| Length | Single Random, Double Random & Required Length. |
| End | Plain End, Beveled End, Treaded End |
Need SS 317 Tubes?
Get competitive pricing, mill test certificates, and a fast 24-hour quotation turnaround.
Applications of Stainless Steel 317 Tubes
High-performance stainless steel 317 tubes offer superior corrosion resistance across demanding industrial applications:
- Chemical Processing: Heat exchanger and process tubing for acids and chloride bearing media.
- Pulp and Paper: Digester, bleach plant and liquor tubing where pitting and crevice attack are severe.
- Flue Gas Desulphurisation: Tubing in scrubber and pollution control equipment handling acidic condensate.
- Power Generation: Condenser and heat exchanger tubes.
- Petrochemical: Heat exchanger tubes in refining and processing units.
- Textile and Dyeing: Tubing in dye houses and bleaching lines.
Need reliable SS 317 tubes for your next project? Contact USA Piping Solution today for custom lengths, daily updated stock rates, and immediate worldwide dispatch.
Frequently Asked Questions
1. What are stainless steel 317 tubes?
Stainless steel 317 tubes are austenitic chromium nickel molybdenum tubes made from UNS S31700. They contain 3.0 to 4.0% molybdenum, which gives better resistance to pitting and crevice corrosion in chloride and acidic media than lower alloyed stainless steel tubes.
2. What is the chemical composition of SS 317?
SS 317 contains 18.0 to 20.0% chromium, 11.0 to 15.0% nickel and 3.0 to 4.0% molybdenum, with carbon at 0.08% maximum, manganese at 2.0% maximum and silicon at 1.0% maximum. Iron makes up the balance.
3. Which ASTM specifications cover 317 tubes?
ASTM A213 covers seamless tubes for boilers, superheaters and heat exchangers. ASTM A249 covers welded tubes for boilers, superheaters, heat exchangers and condensers. ASTM A269 covers seamless and welded tubing for general corrosion resistant and low or high temperature service. The grade is TP317 in each.
4. Why choose 317 tube over 316 tube?
317 contains 3.0 to 4.0% molybdenum against 2.0 to 3.0% in 316, so it resists pitting and crevice corrosion better in chlorides, acids and pulp mill liquors. It costs more, so it is chosen where 316 corrodes too quickly.
5. Is stainless steel 317 magnetic?
No, not in the annealed condition, because the structure is austenitic. Cold working can leave slight magnetism, which is far lower than in ferritic or martensitic stainless steels.
6. Can 317 stainless steel tube be welded?
Yes. 317 welds with standard fusion methods. Its carbon limit is 0.08% maximum, so welded fabrications are normally solution annealed afterwards where intergranular corrosion is a risk. Clean heat tint from the weld zone to keep corrosion resistance.
USA Piping Solution is your trusted manufacturer, supplier, and stockist of high-performance stainless steel 317 and 317L tubes. We deliver precision-engineered, corrosion-resistant seamless and welded tubing tailored to your exact project specifications. All products ship with complete material traceability and MTCs per EN 10204 3.1.
Request a Quote