Daxun is a premier exporter and supplier of top-quality 317L Stainless Steel Pipe and UNS S31703 Welded Pipe, available in a range of sizes, thicknesses, and standards. Discover competitive prices for China SS Grade 1.4438 Stainless Steel Pipe online.

Daxun Alloy is a distinguished leader in the stainless steel pipe industry, offering exceptional 317/317L seamless pipes known for their robust durability and precise dimensional accuracy. Leveraging both domestic and international steel raw materials, we manufacture SS 317L pipes in diverse sizes and thicknesses tailored to meet the specific needs of our business clientele. The 317L alloy, a low-carbon stainless steel, boasts higher concentrations of chromium, nickel, and molybdenum compared to 316L, delivering superior corrosion resistance. This alloy withstands sulphurous, acetic, formic, citric, and tartaric acids, and resists pitting corrosion in environments containing phosphoric acid, chlorides, bromides, and iodides. Our offerings include 317L Stainless Steel Seamless Pipe, 317L Stainless Steel ERW Pipe, 317L Stainless Steel EFW Pipe, and 317L Stainless Steel Welded Pipe and Tube, all conforming to ASTM A213 / A312 / A269 / A358 standards.

Chemical Composition of 317L Stainless Steel Pipe

Premier Suppliers of Stainless Steel Tubes and Pipes in China

GENERAL PROPERTIES

The 317L Stainless Steel Pipe incorporates molybdenum in its composition, making it a low-carbon austenitic stainless steel. This enhanced formulation includes higher levels of chromium, nickel, and molybdenum, significantly boosting its corrosion and chemical resistance, particularly against sulfite, acetic, formic, citric, and tartaric acids. Thanks to its low carbon content, the 317L Pipe resists sensitization during welding, and exhibits superior creep, rupture stress, and tensile strength at elevated temperatures. It remains nonmagnetic when annealed but may acquire slight magnetism post-welding.

APPLICATIONS

The 317L seamless pipe is indispensable in processes involving sulfur handling, pulp liquors, acid dyes, acetylation and nitration mixtures, bleaching solutions, as well as heavy coal and petroleum operations. Moreover, the 317L alloy finds its applications in a variety of other industries:

• Equipment for handling paper and pulp
• Machinery for chemical and petrochemical processing
• Condensers used in both fossil-fueled and nuclear power stations
• Food processing machinery
• Textile industry equipment

STANDARDS - ALLOY 317L

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

CORROSION RESISTANCE

• Exhibits exceptional resistance to corrosion in challenging environments, especially in acidic chloride conditions
• Provides excellent resistance in applications where maintaining minimal contamination is crucial
• The low carbon content of 317L offers outstanding resistance to intergranular corrosion
• Effectively resists pitting in contact with phosphorus acids, chlorides, bromides, and iodides

HEAT RESISTANCE

• All chromium-nickel-molybdenum steels demonstrate outstanding oxidation resistance
• Maintains a low rate of scaling in standard atmospheres at temperatures up to 1600-1650°F (871-899°C)

WELDING CHARACTERISTICS

• Successful with all common fusion and resistance welding methods, except for oxyacetylene welding
• For welding Type 317L steel, use AWS E317L/ER317L filler metal or low-carbon austenitic fillers with higher molybdenum content, or nickel-base filler metals with sufficient chromium and molybdenum to exceed Type 317L corrosion resistance

MACHINABILITY

• To minimize work hardening, use low speeds and constant feeds
• Tougher than 304 stainless steel, with long stringy chips; chip breakers are recommended for efficient machining

Testing

• We provide an extensive array of mechanical tests to ensure the reliability of our products. These tests include expansion, hardness, micro and macro examinations, chemical analysis, and more, all aimed at delivering the highest satisfaction for our esteemed customers.