Stainless Steel 317/317L Tubes Manufacturer & Supplier
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Stainless Steel 317 tube and 317L are high-performance austenitic alloys designed for use in high-temperature and chloride-rich environments. Midland Alloys Inc. is a trusted manufacturer and supplier of Stainless Steel 317 tube and 317L, known for delivering high-quality products. Both are perfect for oil and gas, chemical, pharmaceutical, food-grade and marine piping because of their exceptional resistance to pitting, crevice corrosion, and chemicals. The carbon level of 317L is lower (0.03% max) than that of 317 (0.04% max), which enhances weldability and reduces the possibility of weld degradation. Their composition includes 18–20% chromium, 11–15% nickel and 3–4% molybdenum giving them strength and durability. These tubes are available in seamless, welded, ERW and EFW forms, manufactured to ASTM A213 / ASME SA 213 standards. We maintain a large inventory on hand for prompt worldwide shipping and we provide SS 317/317L stainless steel tubes in customized sizes and cut-to-length choices.
Benefits of Stainless Steel S31700 Seamless Tubes
Stainless Steel S31700 seamless tubes are known for their superior performance in demanding conditions. Their unique material properties offer several advantages, making them a smart choice for long-term, high-quality applications.
- Corrosion Resistance: S31700 seamless tubes offer excellent resistance to pitting, crevice corrosion, and chemical attack, especially in chloride-rich environments.
- High-Temperature Strength: These tubes maintain their strength and structural stability at elevated temperatures.
- Durability: Built for long service life, S31700 seamless tubes resist wear, impact, and mechanical stress.
- Aesthetic Appeal: With a smooth, clean finish, these tubes provide a modern, polished look.
- Hygiene: The non-porous surface of S31700 resists bacterial growth and is easy to clean.
Specification of 317/317L Stainless tube
Seamless Tube OD : 1 / 2" NB - 16" NB
Welded Tube OD : 1 / 2" NB - 24" NB
EFW Tube Size : 6.00 mm OD up to 914.4 mm OD
ASTM A213, A269, A249, A511, A554 / ASME SA213, SA269, SA249, SA511, SA554
Seamless / Welded / ERW / Fabricated / CDW / 100% X Ray Welded
Round, Square, Rectangular, Hydraulic Etc
Single Random, Double Random, Standard & Cut length
Plain Ends (PE), Threaded Ends (TE), Bevelled Ends (BW), Grooved Mechanical Joints or Grooved Ends, TBE (Treaded Both Ends)
SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS
2B, No.4, No.1, No.8 Mirror Finish for Stainless Steel Tubes, Finish as per customer Requirements
Contact us today to discuss how Stainless Steel 317/317L Tubes can benefit your application. Whether you need guidance in selecting the right Tubes or have specific requirements, our team of experts is here to help you find the optimal solution.
Technical Details & Delivery Condition
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 317 | min. | – | – | – | – | – | 18.0 | – | 11.0 | – |
| max. | 0.8 | 2.0 | 1.00 | 0.040 | 0.03 | 20.0 | 14.0 | – | ||
| 317L | min. | – | – | – | – | – | 18.0 | 3.00 | 11.0 | – |
| max. | 0.03 | 2.0 | 0.75 | 0.040 | 0.03 | 20.0 | 4.00 | 15.0 | – | |
| Grade | Density (kg/m3) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (m/m/0C) | Thermal Conductivity (W/m.K) | Specific Heat 0-1000C (J/kg.K) | Electrical Resistivity (n.m) | |||
| 0-1000C | 0-3150C | 0-5380C | at 1000C | at 5000C | |||||
| 317 | 8000 | 193 | 17.2 | 17.8 | 18.4 | 16.2 | 21.5 | 500 | 720 |
| 317L | 8000 | 193 | 17.2 | 17.8 | 18.4 | 16.2 | 21.5 | 500 | 720 |
| Grade | UNS No | Old British | Euronorm | Swedish SS | Japanese JIS | ||
| BS | En | No | Name | ||||
| 317 | S31700 | – | – | 1.4449 | – | – | – |
| 317L | S31703 | – | – | 1.4438 | – | – | – |
Stainless Steel Tubes Grades We Offer
Round Bar
Analytic
Cut to Length
Centering
Heating
Perforation
Inspection of Size
Pickling
Inspection of Surface
Lubricating
Cold Drawing (Cold Rolling)
Degreasing
Annealing
Straightening
Cut
Pickling / Passivating
Inspection
Analytic
Marking
Packing & Shipping
SS 317/317L vs Other Stainless Steel Grades
Stainless steel 317 tube and 317L stand out from other stainless steel grades like 304, because they offer better corrosion resistance, especially in harsh chemical and high-temperature environments. Due to higher levels of molybdenum and chromium, 317/317L performs well where stainless steel 304 tube may fail, such as in chemical plants, paper mills, or marine settings. While 304 is great for general use, 317L handles more aggressive conditions and offers better weldability due to its lower carbon content. If strength, durability, and chemical resistance matter most, SS 317 or 317L is the smarter choice.
Applications of SS UNS S31700 / S31703 Seamless Tubing
UNS S31700 Stainless Steel Tube is chosen for its strong resistance to chlorides, high heat, and clean surface finish. In chemical and petrochemical plants, it handles corrosive fluids and harsh acids. Oil and gas sites use these tubes in offshore rigs and sour gas systems where rust is a big risk. Power plants rely on them in boilers and superheaters due to their heat strength. In pharma and food units, the smooth surface helps maintain hygiene during processing. Pulp and paper mills use these tubes in bleaching and digesting zones where chemicals wear out regular steel. Each of these industries uses SS 317/317L tube for its long life and performance.
Why choose Midland Alloys Inc. for SS 317/317L Tube
We are a reliable supplier and manufacturer of SS 317 and 317L tubes, known for providing quick, high-quality service. We offer complete paperwork, including mill test certificates, 100% radiography test reports and raw material certificates, and we adhere to international standards such as ASTM A213 and ASME SA 213. On request, third-party TUV, BV, and DNV inspections are also offered. In order to meet urgent or complex project requirements, we keep a ready stock and provide custom lengths and unique finishes. With strong export capabilities to the Gulf, Europe and Southeast Asia, we handle shipping and logistics efficiently. Our competitive pricing, fast response time, and long-standing partnerships with industrial clients worldwide set us apart.
FAQs – SS 317/317L Tubes
Yes, at high temperatures, the structural integrity of SS 317 and 317L is maintained. When thermal stability is crucial they are frequently utilized in boilers, heat exchangers and superheaters.
To accommodate varying pressure ratings and installation requirements, SS 317/317L stainless steel tubes are offered in seamless, welded, ERW, and EFW forms.
The SS 317L tube price per kg in India can vary based on size, finish, quantity, and market demand. Standard seamless tubes typically cost between ₹450 and ₹650 per kilogram. The ultimate pricing may vary depending on bulk orders, custom lengths, or unique surface treatments.
