Products

TP 317/L - 1.4438

Wst. 1.4438

UNS S31703

Stock program: 3 – 38 mm OD / 1/8” – 1.1/2” OD

Specification: ASTM A 213/ASME SA 213 / EN 10216-5/EN 10305/ISO 15156-3 / NACE MR0175/PED 97/23 EC

Maximum service temperature: 430°C / 800°F


317L is a molybdenum-bearing austenitic stainless steel with greatly increased resistance to chemical attack as opposed to the conventional chromium-nickel austenitic steel alloys 304L & 316L. The addition of molybdenum gives alloy 317L tubing improved resistance to chloride and other halides. Due to its low carbon content the 317L tubing can be welded without risk of sanitization due to inter granular corrosion that can result from chromium carbide precipitation in the grain boundaries. 317L is non magnetic in the annealed condition, but may become slightly magnetic as result of welding.


Characteristics

  • Resistance to sensitization during welding
  • Higher creeps, stress-to-rapture and tensile strength at elevated temperatures
  • Corrosion and pitting resistance
  • Resistance in acidic and hand water areas

Market applications:

  • Offshore, oil & gas
  • Chemical
  • Hydraulic
  • Shipbuilding
  • Refining
  • Pulp and paper

Technical details

Technical composition (%)
Fe
Cr
Ni
Mo
Mn
Si
P
C
S
317L min
Bal.
18.0
11.0
3.0
-
-
-
-
-
  max
-
20.0
15.0
4.0
2.00
1.00
0.040
0.035
0.030
Mechanical properties
317L
Tensile strenght (mpa, min)
515 - 750
Yield strength (0.2% offset mpa, min)
205
Elongation (%, min)
35
Density / weight (g / cm3 / kg)
7.90

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