Daxun is a premier exporter and supplier of 317L Stainless Steel Pipe and UNS S31703 Welded Pipe, available in an array of sizes, thicknesses, and standards. Discover online China SS Grade 1.4438 Stainless Steel Pipe Price.

Daxun Alloy stands as a leading manufacturer of stainless steel pipes, boasting unparalleled expertise in SS 317/317L seamless pipes. These pipes are celebrated for their exceptional durability and precise dimensions. Leveraging both domestic and international steel raw materials, we produce SS 317L pipes in a myriad of sizes and thicknesses, catering to the bespoke needs of business clients. The 317L alloy, a low-carbon stainless steel, offers superior chromium, nickel, and molybdenum content compared to 316L, ensuring enhanced corrosion resistance. This remarkable steel withstands sulphurous, acetic, formic, citric, and tartaric acids, and resists pitting corrosion when exposed to phosphoric acid, chlorides, bromides, and iodides. We offer an extensive range including 317L Stainless Steel Seamless Pipe, ERW Pipe, EFW Pipe, and Welded Pipe and Tube, all conforming to ASTM A213 / A312 / A269 / A358.

Chemical composition of 317 stainless steel pipe

Leading stainless steel tube and pipe Suppliers in China

GENERAL PROPERTIES

The 317L Stainless Steel Pipe by Jiangsu Daxun Alloy Co., Ltd. is an exceptional molybdenum-containing low-carbon austenitic stainless steel. It boasts enhanced chromium, nickel, and molybdenum content, elevating its resistance to corrosion and chemicals such as sulfite, acetic, formic, citric, and tartaric acids. Its low carbon feature prevents sensitization during welding, enhancing its creep, rupture stress, and tensile strength at elevated temperatures. The pipe remains nonmagnetic when annealed but may exhibit slight magnetism post-welding.

APPLICATIONS

Our 317L seamless pipes are pivotal in industries handling sulfur, pulp liquors, acid dyes, acetylation and nitration mixtures, bleaching solutions, heavy coal, petroleum, and various chemical compounds. Key applications also include:

• Paper and pulp handling equipment
• Chemical and petrochemical processing equipment
• Condensers in fossil and nuclear fueled power generation stations
• Food processing equipment
• Textile equipment

STANDARDS - ALLOY 317L

• ASTM/ASME: UNS N08020
• EURONORM: FeMi35Cr20Cu4Mo2
• DIN: 2.4660

CORROSION RESISTANCE

• The 317L alloy showcases unmatched corrosion resistance in harsh environments, particularly against a wide range of chemicals, especially acidic chlorides.
• Ideal for applications where minimizing contamination is critical.
• Its low carbon content offers superior resistance to intergranular corrosion.
• Effectively resists pitting in contact with phosphorus acids, chlorides, bromides, and iodides.

HEAT RESISTANCE

• All chromium-nickel-molybdenum steels, including 317L, exhibit excellent oxidation resistance.
• Displays a low rate of scaling in typical atmospheres at temperatures up to 1600-1650°F (871-899°C).

WELDING CHARACTERISTICS

• The 317L alloy can be welded successfully using all common fusion and resistance methods except oxyacetylene welding.
• For optimal welding of Type 317L steel, it is recommended to use AWS E317L/ER317L filler metal or austenitic, low carbon filler metals with higher molybdenum content than Type 317L, or a nickel-base filler metal with ample chromium and molybdenum content to surpass the corrosion resistance of Type 317L.

MACHINABILITY

• To minimize this alloy's work hardening tendency, employ low speeds and constant feeds.
• Considered tougher than 304 stainless steel and characterized by long stringy chips, the use of chip breakers is advisable.

Testing

• Jiangsu Daxun Alloy Co., Ltd. offers a comprehensive range of mechanical tests to ensure the highest quality of our products. Our testing suite includes expansion tests, hardness tests, micro and macro analyses, chemical tests, and more, all designed to assure high satisfaction among our esteemed customers.