AISI 317L Stainless Steel Coil

317LStainless Steel Coil

Introduction：

317L(00Cr19Ni13Mo3, SUS317L) alloy is austenitic stainless steel based on molybdenum. Compared with the conventional cr-ni austenitic stainless steel such as 304 alloy, it has stronger resistance to chemical corrosion. In addition, compared with conventional stainless steel, 317L alloy has higher ductility, stress corrosion resistance, compressive strength and high temperature resistance. It is low carbon grade or L grade, which has resistance to sensitization during welding and heat treatment.

317L has excellent corrosion resistance in a variety of chemical environments, especially in acidic chloride environments, such as those found in pulp and paper mills. Compared with 316L stainless steel, the content of chromium, nickel and molybdenum increased, which improved the resistance to chloride pitting corrosion and total corrosion. The resistance increases with the increase of molybdenum alloy content. 317L is resistant to 5% sulfuric acid at temperatures up to 49 ° C (120 ° f). The alloy has excellent resistance to high concentrations of solutions at temperatures below 38 ° C (100 ° f). However, maintenance testing is recommended to consider the effects of specific operating conditions that may affect corrosion behavior

Mechanical properties: 

YS (Mpa) ≥176,TS (Mpa) ≥480,EL (%) ≥40,Hv≤200

Chemical composition:

 317 l: chemical composition of carbon (C) 0.030 or less, manganese (Mn) of 2.00 or less, nickel (Ni) 11.0 ~ 15.0, silicon (Si) of 1.00 or less, phosphorus (P) of 0.045 or less, sulfur (S) of 0.030 or less, chromium (Cr) 18.0 ~ 20.0, molybdenum (Mo) 3.0 ~ 4.0

Application:

 Compared with 316L, 317L steel has good seawater resistance and SCC resistance, which is used for Chemical ship, Chemical product Reactor and other Chemical equipment requiring high corrosion resistance.

specifications:

 317L cold-rolled sheet (roll) 2B (BA), 8K mirror, gold plating. Plate width (1219*2438 1500*3000 1219*L 1500*L)

 Specifications 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.2, 1.5, 2, 2.5, 3, 4, 4.5, 5, 6, 8

 317 L hot rolled plate. Sheet width (1500*6000 1000*6000)

 Specifications 3, 4, 5, 6, 8, 10, 12, 14, 16, 18, 20, 24, 26, 28, 30, 32, 35, 36, 38, 40, 42, 45, 50, 55, 60, 70, 80

General properties:

Alloy 317lmn and 317L are molybdenum containing austenitic stainless steels. Compared with conventional chromium nickel austenitic stainless steels (such as alloy 304), their chemical corrosion resistance is better. In addition, 317lmn and 317L alloys have higher fracture stress strength and better ductility than conventional stainless steel in high temperature environment. All are low carbon grade or "L" grade and provide anti sensitization during welding and other heat treatment processes. " M "and" n "refer to the composition containing incremental amounts of molybdenum and nitrogen. The combination of molybdenum and nitrogen can improve the pitting and pitting resistance, especially in the high temperature environment containing acidic compounds, chlorides and sulfides. Nitrogen can also improve the strength of these alloys. Both alloys are designed for harsh operating environments, such as flue gas desulfurization systems

Alloy 317lmn and 317L stainless steels are more resistant to sulfuric acid corrosion than conventional chromium nickel stainless steels. The corrosion resistance of the alloy increases with the increase of molybdenum composition. These alloys can withstand up to 5% sulfuric acid at temperatures up to 120 ° f (49 ° C). These alloys exhibit excellent corrosion resistance at temperatures below 100 ° f (38 ° C) and resist higher concentrations of solutions. However, application testing should consider specific operational factors that may affect corrosion behavior. In the process of sulfur-containing gas concentration, these alloys are more resistant to the corrosion of concentrated gas than conventional alloy 316. The concentration of acid has an important influence on the corrosion rate in this kind of environment, which should be carefully determined according to the specific application test.