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Alloys 317LMN and 317L are molybdenum-containing austenitic stainless steels that offer better resistance to chemical attack than conventional chromium-nickel austenitic stainless steels such as alloy 304. In addition, 317LMN and 317L alloys have greater fracture stress strength and better ductility than conventional stainless steels in high-temperature environments. All are low carbon grades or "L" grades that provide resistance to sensitization during welding and other heat treatments. "M" and "N" refer to compositions containing incremental molybdenum and nitrogen. The combination of molybdenum and nitrogen is beneficial for improving pitting and crevice corrosion resistance, especially in high temperature environments containing acidic compounds, chlorides and sulfides. Nitrogen is also beneficial in increasing the strength of these alloys. Both alloys are designed for harsh operating environments such as flue gas desulfurization systems.
317LMN stainless steel is a low-carbon, austenitic chromium-nickel-molybdenum stainless steel that provides superior corrosion resistance to type 304 and 316 stainless steels. In addition, 317LMN offers higher creep, stress-to-rupture and tensile strength at elevated temperatures than conventional austenitic stainless steels.
Stainless steel is a common material used in many different industries for a variety of applications. One type of stainless steel that is particularly well-suited for certain applications is 317LMN stainless steel.
Some of the key properties of 317LMN stainless steel that make it ideal for certain applications include its high creep resistant, corrosion resistant, and oxidation resistant qualities. This makes it an excellent choice for use in high temperature environments or for applications where chemical cleaning is required.
Some specific examples of industries and applications that often use 317LMN stainless steel sheet include power generation, petrochemical processing, medical equipment manufacturing, and food processing. Thanks to its versatile nature, this type of stainless steel can be used in a wide variety of other industries as well.
317lmn stainless steel sheet is made by combining austenitic and ferritic metals to create a highly corrosion-resistant alloy. The exact composition of these metals varies depending on the manufacturer, but they typically include chromium, nickel, molybdenum, and manganese. The sheets are then rolled out to the desired thickness and heat-treated to ensure strength and durability.
317Lmn stainless steel is an austenitic chromium-nickel stainless steel with molybdenum addition. The addition of molybdenum increases corrosion resistance, particularly against pitting and crevice corrosion in chloride environments. 317Lmn is non-magnetic in the annealed condition but can become magnetic if cold worked.
The composition of 317Lmn stainless steel gives it excellent mechanical properties. In the annealed condition it is strong and ductile with good toughness. It has excellent corrosion resistance in both mild and aggressive environments and good oxidation resistance at high temperatures.
Cold working 317Lmn stainless steel will increase its strength and hardness while maintaining good corrosion resistance. Hot working should be done between 1149-1260°C (2100-2300°F).
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
Chemical Properties:
| C | Mn | Si | Cr | Ni | Mo | P | S | N | |
| 317LMN | 0.035 max | 2.00 max | 0.75 max |
min: 17.0 max: 20.0 |
min: 13.50 max: 17.50 |
min: 4.0 max: 5.0 |
0.04 max | 0.03 max |
min: 0.10 max: 0.20 |
Mechanical Properties:
| Grade | Tensile Strength ksi (MPa) min | Yield Strength 0.2% offset ksi (MPa) min | Elongation (% in 50mm) min | Hardness (Brinell) MAX | Hardness (Rockwell B) MAX |
| 317LMN | 80 (550) | 35 (240) | 40 | 223 | 96 |
Thermoforming
The recommended working temperature for thermal processing is1652-2102°F (900-1150°C)
The alloy cannot be processed below 1742" F (950C). If the final forming temperature is lower than this value, it must be solution annealed in the range of 19762156° F (1080-1180° C). Rapid quenching is also necessary ongoing.
cold forming
The alloy is ductile and easily formed.
Compared with the standard 304 or 304L, its increased aluminum and ammonia content means that it requires more powerful processing equipment.
welding
Alloy 317L is readily weldable in most standard machining and requires no post-weld heat treatment.
Processing 317LMN stainless steel sheet can be done with a variety of methods, depending on the desired end result. Cold working is possible, as this material can only be hardened in this way. Hot working is also possible and all common hot working processes are possible with this alloy. Annealing is another option which can help to increase ductility and reduce hardness.
HUACI metals is the best 317lmn stainless steel sheet manufacturer in China. With over 20 years of experience, we have developed a reputation for quality and excellence. We use the latest technology and equipment to produce the highest quality products. Our products are backed by a team of experts who are always available to answer any questions or concerns. We are committed to providing the best possible customer service and we look forward to serving you.
Joyce
