Stainless Steel Alloy 317L


Type 317L is a low carbon austenitic stainless steel version of Type 317 that offers improved corrosion resistance over Type 304/304L. Some of the other major benefits of Type 317L include:

  • Better general and localized corrosion resistance compared to 316/316L stainless steel
  • Good formability and weldability
  • Increased resistance to chemical attack from acids
  • Lower carbon content leads to resistance to sensitization when welded
  • Non-magnetic

Like all stainless steels, Type 317L has a unique chemical composition that includes the following:

  • Fe Balance
  • Cr 18-20%
  • Ni 11-15%
  • Mn 2%
  • Si 0.75%
  • C 0.03%
  • N 0.1%
  • S 0.03%
  • P 0.045%

Because of Type 317L benefits and chemical composition, it is used extensively in a variety of industries for many applications including:

  • Paper and pulp equipment
  • Chemical and petrochemical processing
  • Food processing
  • Power generation including fossil fuels and nuclear
  • Flue gas desulfurization systems