Zhengzhou Huitong Pipeline Equipment Co.,Ltd. |
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UNS S31703
Forms of 317L Stainless Steel Available
• 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 10° 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.
Ni | Cr | Mo | Mn | Si |
11.0 - 15.0 | 18.0 - 20.0 | 3.0 - 4.0 | 2.0 Max | .75 Max |
C | N | S | P | Fe |
0.03 Max | 0.1 Max | 0.03 Max | 0.045 Max | Balance |
Ultimate Tensile Strength, ksi Minimum | .2% Yield Strength, ksi Minimum | Elongation Percent | Hardness Max. |
75 | 30 | 35 | 217 Brinell |
We can provide 317L material in the form of flange, fittings, pipes, fasteners.