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317l Fittings	317l Seamless Tube / Stainless Steel Tubes
317l Stainless Steel Tubing	Stainless Steel Tubes
317l Seamless Pipe	Stainless Steel Plates / Stainless Steel Sheets

 

317L STAINLESS STEEL

UNS S31703

Forms of 317L Stainless Steel Available at Pacific Stainless & Alloys

• Sheet
• Plate
• Bar
• Pipe & Tube (welded & seamless)
• Fittings (i.e. flanges, slip-ons, blinds, weld-necks, lapjoints, long welding necks, socket welds, elbows, tees, stub-ends, returns, caps, crosses, reducers, and pipe nipples)
• Welding Wire and Welding Electrode

317L Stainless Steel Overview

317L is a molybdenum bearing, low carbon content "L" grade austenitic stainless steel that provides improved corrosion resistance over 304L and 316L stainless steels. The low carbon provides resistance to sensitization during welding and other thermal processes.

317L is non-magnetic in the annealed condition but may become slightly magnetic as a result of welding.

Corrosion Resistance

317L has excellent corrosion resistance in a wide range of chemicals, especially in acidic chloride environments such as those encountered in pulp and paper mills. Increased levels of chromium, nickel and molybdenum compared to 316L stainless steel improve resistance to chloride pitting and general corrosion. Resistance increases with molybdenum alloy content. 317L is resistant to sulfuric acid concentrations up to 5 percent at temperatures as high as 120°F (49°C). At temperatures under 100°F (38°C) this alloy has excellent resistance to solutions of higher concentration. However, service tests are recommended to account for the affects of specific operating conditions that may affect corrosion behavior. In processes where condensation of sulfur-bearing gases occurs, 317L is much more resistant to attack at the point of condensation than conventional alloy 316. The acid concentration has a marked influence on the rate of attack in such environments and should be carefully determined by service tests.

Chemical Composition, %

Characteristics

• Improved general and localized corrosion to 316L stainless
• Good formability
• Good weldability

Applications

• Flue-gas desulfurization systems
• Chemical process vessels
• Petrochemical
• Pulp and Paper
• Condensers in power generation

Mechanical Properties
Minimum Specified Properties, ASTM A240

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