Stainless Steel 317 tube, also known as UNS S31700, is a molybdenum-bearing austenitic stainless steel tube. It is one of the grades of SS seamless tube with enhanced corrosion resistance due to higher chromium, nickel, and molybdenum content.
ASTM A213 317 Stainless Steel Seamless Tube Manufacturer in China
We, Zhejiang Xintongda Special Steel (XTD), are a leading manufacturer in China and a global supplier of stainless steel 317 seamless tubes. This tube is an austenitic grade that contains 18.0–20.0% chromium, 11.0–15.0% nickel, and 3.0–4.0% molybdenum. We produce this tube in strict compliance with ASTM A213, ASME SA213, and EN 1.4438 standards. The increased molybdenum content makes alloy 317 a preferred choice for resisting pitting and crevice corrosion. Its main features include excellent corrosion resistance in acidic media, strong performance at elevated temperatures, and superior strength. This tube is widely used for chemical processing, textile, and paper production industries. We have multiple international certifications and an annual supply capacity of 25000 tonnes. We can ship these tubes within a week for stock orders. We are a reliable stainless steel 317 tube supplier and offer competitive pricing. Contact us to order and procure the highest quality UNS S31700 tubing.
Our tubes meet the following specifications:
-
Standard
ASTM A213
-
OD Range
6.35-257 mm
-
Thickness
0.89-12.7 mm
-
Length
≤ 22 m
Get a free quote now
Technical Data
Technical Data
Steps Involved in Manufacturing Stainless Steel 317 Tube
As a reliable 317 stainless steel tube manufacturer, we make this UNS S31700 tube through a precise process involving hot piercing. This is followed by cold drawing or rolling to achieve the final dimensions. We then use solution annealing and pickling to remove scale and restore maximum corrosion resistance before finishing. For details on our manufacturing process, please refer to our production page.
What are the Features of Alloy 317 Tubing?
Alloy 317 tubing has 5 main characteristics. These include corrosion resistance, high strength, good ductility, excellent weldability and high-temperature stability.
- Corrosion Resistance: 317 stainless steel tubes have higher molybdenum. This provides excellent protection against organic acids and chlorides. This makes it much more resistant to pitting than standard grades in chemical environments.
- High Strength: The 317 stainless steel tubing has a reliable tensile strength that makes it suitable for use in high-pressure industrial settings. It stays strong, even when there are heavy mechanical loads or high pressure.
- Good Ductility: Even with high alloy content, 317 stainless steel tubing is easy to form and shape into different industrial components. This flexibility makes it preferred in complex piping systems without cracking.
- Excellent Weldability: This tube is easy to weld with any standard fusion or resistance method. When the right procedures and filler materials are used, it offers good weldability.
- High-Temperature Stability: The 317 ss tubing retains its mechanical properties and resists oxidation even when exposed to elevated temperatures. It is ideal for heat exchangers and other equipment where high heat is constant.
What is the Equivalent Standard for 317 Stainless Steel?
317 stainless steel is commonly known as UNS S31700. Its global equivalents include Werkstoff Nr. 1.4449, SUS 317, and AISI 317.
| GRADE | UNS | GB | JIS | ISO | DIN/EN | GOST | |
| ISC | NEW | ||||||
| 317 | S31700 | S31708 | 06Cr19Ni13Mo3 | SUS317 | - | 1.4449 | - |
100% Certified Testing & Documentation
- EN 10204 3.1 and EN 10204 3.2 Material Test Certificates (MTC)
- Raw Materials Certificate
- 100% PMI
- Heat Treatment Charts
- Third-Party Inspection Report
- Surface roughness and size measurement
- Manufacturer Test Certificate (Impact Testing, Flattening, Flare, Bend, Hardness, Intergranular, Pitting Corrosion, Grain size, ET, UT, HT)
- Laboratory Test Certificate from the Government-Approved Lab
In Which Industries is Stainless Steel 317 Seamless Tube Used?
Stainless steel 317 seamless tube is used in 6 demanding industries. The comprehensive list of these industries includes:
Chemical & Petrochemical Industry
SS 317 seamless tube is used in flue gas desulfurisation systems and heat exchangers to handle corrosive chemicals. It can handle the harsh acidic conditions that are common in big processing plants.
Pulp & Paper Industry
The tube is used in bleaching equipment and digesters where it is exposed to harsh paper-making chemicals. It prevents corrosion and extends the lifespan of the machinery.
Power Generation
The 317 stainless steel tube functions as a condenser and superheater tube because it can withstand extreme steam conditions. Its durability ensures the safety and efficiency of energy production.
Food Processing & Pharmaceutical
The tube is used to transport medicines and ingredients as it is easy to clean and doesn't contaminate products. It maintains the high standards of hygiene needed for human consumption.
Marine & Seawater
The 317 stainless tube resists saltwater corrosion. This makes it perfect for marine cooling systems and offshore piping. It prevents salt-induced pitting, which usually destroys lesser grades of steel.
Oil & Gas
This tube is essential for certain oil & gas processing and surface piping applications where it is exposed to high pressure and sour gas. It provides a reliable barrier against the corrosive elements found deep underground.
Frequently Asked Questions
-
What is a Stainless Steel 317 tube?
-
What is the Difference Between Stainless Steel 317 and 317L Tube?The main difference between Stainless Steel 317 and 317L tubes is the carbon content. SS 317L has a maximum carbon content of 0.03%, while SS 317 allows up to 0.08% carbon.
-
What is the heat treating temp, tensile strength and yield strength of SS 317 tube?Solution annealing at 1900–2150°F (1040–1175°C) is the first step in heat treating SS 317 tube. After that the tube is rapidly cooled. The tensile strength is usually between 515 and 620 MPa, and the yield strength is around 205 MPa.