We are Distributors and Suppliers of 317L .

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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



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

Stainless Steel 317 (UNS S31700) is a molybdenum-bearing austenitic stainless steel with greatly increased resistance to chemical attack as compared to the conventional chromium-nickel austenitic stainless steel pipe such as SS 304 and SS 316L. In addition. SS 317 offers higher creep, stress-to-rupture, and tensile strength at elevated temperatures than conventional stainless steel tubing. SS 317L is a low carbon version of SS 317 grade which provides resistance to sensitization during welding and other thermal processes.Stainless Steel 317L is non-magnetic in the annealed condition but may become slightly magnetic as a result of welding.

Chemical Composition

SS 317 SS 317L
Ni 11 – 14 11 – 15
Cr 18 – 20 18 – 20
C 0.08 max 0.035 max
Mo 3 – 4 3 – 4
Fe Balance
Mn 2 max 2 max
Si 1 max 1 max
S 0.03 max 0.03 max
P 0.040 max 0.040 max


Stainless Steel SS 317 / 317L
AISI 317 / 317L
UNS S31700 / S31703
Werkstoff Nr. 1.4449 / 1.4438

Mechanical & Physical Properties

Density 8.0 g/cm3
Melting Point 1454 °C (2650 °F)
Tensile Strength Psi – 75000 , MPa – 515
Yield Strength (0.2%Offset) Psi – 30000 , MPa – 205
Elongation 35 %

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