General Properties
Alloy 317LMN is an austenitic, higher-molybdenum bearing stainless steel further alloyed with nitrogen that is particularly effective in enhancing resistance to pitting and crevice corrosion and also has excellent resistance to chemical attack. Its low carbon composition provides resistance to sensitization during welding and the additional nitrogen serves to increase its strength. Alloy 317LMN has the highest aqueous corrosion resistance of all standard stainless steels and also has higher creep, stress-to-rupture, and tensile strength at higher temperatures.
Specifications: UNS S31726
Applications:
Similar to alloy 317L, 317LMN is commonly used to handle sulfur, pulp liquor, acid dyestuffs, bleaching solutions, flue gasses, and many chemical compounds. Industries that frequently use alloy Alloy 317LMN include:
Paper and pulp
Textile
Food processing
Process equipment
Standards:
ASTM/ASME: UNS S31726
EURONORM: FeMi35Cr20Cu4Mo2
DIN: 1.4439
Corrosion Resistance:
Alloy 317LMN, along with 317L, is considered more resistant to atmospheric and other mild type of corrosion, along with solutions of sulfuric acids, than conventional chromium-nickel stainless steels
Resistant to sulfuric acid concentrations at temperatures as high as 129oF (49oC)
High molybdenum and nickel content significantly improves chloride pitting and crevice corrosion
Low carbon content provides sensitization to intergranualr corrosion during welding and other thermal processes
Has the highest aqueous corrosion resistance of all standard stainless steels
Oxidation Resistance:
All chromium-nickel-molybdenum stainless steels have excellent resistance to oxidation
Has a low rate of scaling in ordinary atmospheres at temperatures up to 1600 to 1650oF (871 to 899oC)
