Stainless steel grade 317L is a low carbon version of grade 317 stainless steel. It has the same high strength and corrosion resistance as 317 steel but can produce stronger welds due to the low carbon content.
The following datasheet provides an overview of stainless steel grade 317L.
Chemical Composition
The chemical composition of grade 317L stainless steel is outlined in the following table.ElementContent (%)Iron, FeBalanceChromium, Cr18-20Nickel, Ni11-15Molybdenum, Mo3-4Manganese, Mn2Silicon, Si1Phosphorous, P0.045Carbon, C0.03Sulfur, S0.03
Mechanical Properties
The mechanical properties of grade 317L stainless steel is displayed in the following table.PropertiesMetricImperialTensile strength595 MPa86300 psiYield strength260 MPa37700 psiModulus of elasticity200 GPa29000 ksiPoisson’s ratio0.27-0.300.27-0.30Elongation at break (in 50 mm)55%55%Hardness, Rockwell B8585
Other Designations
Equivalent materials to grade 317L stainless steel is given below.AISI 317LASTM A167ASTM A182ASTM A213ASTM A240ASTM A249ASTM A312ASTM A774ASTM A778ASTM A813ASTM A814DIN 1.4438QQ S763ASME SA240SAE 30317L
Manufacturing Process
Machining stainless steel grade 317L requires low speeds and constant feeds to reduce its tendency to work harden. This steel is tougher than grade 304 stainless steel with a long stringy chip; however, using chip breakers is recommended. Welding can be performed using most of the conventional fusion and resistance methods. Oxyacetylene welding should be avoided. AWS E/ER 317L filler metal is recommended.
Conventional hot working processes can be performed. The material should be heated to 1149-1260°C (2100-2300°F); however, it should not be heated below 927°C (1700°F). To optimize corrosion resistance, a post-work annealing is recommended.
Shearing, stamping, heading and drawing are possible with grade 317L stainless steel, and post-work annealing is recommended to eliminate internal stresses. Annealing is performed at 1010-1121°C (1850-2050°F), which should be followed by rapid cooling.
Grade 317L stainless steel does not respond to heat treatment.
Applications
Grade 317L stainless steel is widely used in the following applications:
Condensers in fossil
Pulp and paper manufacturing
Nuclear fueled power generation stations
Chemical and petrochemical process equipment.
Stainless Steel Pipes and Tubes
Stainless Steel Pipe Fittings
Stainless Steel Flanges
Stainless Steel Forgings
Source: wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)
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