317 and 317LMN are types of stainless steel that fall into the 300 series category, known for their chromium-nickel content. Both types contain higher levels of molybdenum than the common 316 stainless steel, which imparts increased resistance to pitting and crevice corrosion in chloride environments. Here’s a closer look at each:
317 Stainless Steel: The 317 variant has a high level of molybdenum content that provides improved resistance to pitting and crevice corrosion compared to 316/316L stainless steel under chloride environments. Additionally, it exhibits high strength at elevated temperatures and is often used in flue gas desulfurization systems.
317LMN Stainless Steel: The ‘LMN’ in 317LMN stands for Low Carbon, Molybdenum, and Nitrogen. This is a high-molybdenum, low-carbon, nitrogen-bearing version of stainless steel Type 317 that provides improved corrosion resistance over Type 316L in highly corrosive process environments, particularly those containing chlorides or other halides. The nitrogen addition serves to increase the strength of these alloys.
When we refer to 317/317LMN Stainless Steel Sheets, it refers to sheets of steel made from these specific variations of the 317 stainless steel. These sheets would be used in situations where a higher level of corrosion resistance is required, particularly in aggressive chloride environments, such as in chemical processing or power plant applications.
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317 Stainless Steel and its modified version, 317LMN, are austenitic stainless steel alloys with high levels of molybdenum, chromium, and nickel. Here are the features and benefits of 317/317LMN Stainless Steel Sheets:
Corrosion Resistance: 317/317LMN Stainless Steel Sheets exhibit excellent corrosion resistance, particularly in highly corrosive environments containing chlorides, acids, and chemicals. They offer superior resistance to pitting corrosion, crevice corrosion, and general corrosion.
High Strength and Durability: 317/317LMN Stainless Steel Sheets have high tensile strength and durability, providing structural integrity and long-term performance. They offer good mechanical properties and are resistant to deformation under high stress.
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Heat Resistance: 317/317LMN Stainless Steel Sheets have excellent heat resistance and can withstand high temperatures without significant deformation or oxidation. They are often used in high-temperature applications, such as heat exchangers, furnace components, and chemical processing equipment.
Excellent Weldability: 317/317LMN Stainless Steel Sheets offer excellent weldability and can be easily welded using common welding techniques. They exhibit minimal carbide precipitation during welding, reducing the risk of intergranular corrosion.
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Formability: 317/317LMN Stainless Steel Sheets are formable and can be shaped, bent, and formed into various complex shapes and configurations. They exhibit good ductility and can undergo processes such as deep drawing and cold forming.
Chloride Stress Corrosion Cracking Resistance: One of the significant benefits of 317LMN Stainless Steel is its exceptional resistance to chloride stress corrosion cracking (SCC). This makes it highly suitable for applications in marine environments and chloride-rich industrial environments.
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Enhanced Chemical Resistance: 317/317LMN Stainless Steel Sheets offer enhanced resistance to a wide range of chemicals, including corrosive acids, alkalis, and solvents. This makes them suitable for applications involving chemical processing, pulp and paper industry, and offshore and marine environments.
Low Carbon Content (317L): 317L Stainless Steel Sheets have a lower carbon content compared to standard 317, which provides improved resistance to sensitization and reduces the risk of intergranular corrosion.
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Improved Molybdenum Content (317LMN): 317LMN Stainless Steel Sheets have an increased molybdenum content compared to 317, which further enhances the material’s resistance to corrosion and pitting in aggressive environments.
Aesthetic Appeal: 317/317LMN Stainless Steel Sheets have an attractive appearance and can be finished to achieve various surface finishes, including polished, brushed, or matte finishes. This allows for versatility in design and enhances the aesthetic appeal of the applications.
3mm-15mm (Hot Rolled) ;0.3mm-8mm (Cold Rolled) can be customized ;
1000mm/1250mm/1500mm, can be customized
clients' requirement and Standard export sea-worthy packing
Melting and Casting: The raw materials, including iron, chromium, and sometimes additional elements like carbon and manganese, are melted in an electric arc furnace or a basic oxygen furnace. The molten metal is then cast into ingots or slabs.
Hot Rolling: The cast stainless steel slabs or ingots are heated and passed through hot rolling mills. These mills apply pressure to reduce the thickness of the stainless steel and shape it into coils or sheets. The hot rolling process also helps to refine the grain structure and improve the mechanical properties of the steel.
Annealing: After hot rolling, the stainless steel sheets may undergo an annealing process. Annealing involves heating the stainless steel to a specific temperature and holding it for a certain period to relieve internal stresses and improve the material’s mechanical properties. Annealing can also enhance the corrosion resistance and formability of the stainless steel.
Cold Rolling: The hot-rolled stainless steel sheets can undergo cold rolling processes to further reduce the thickness and improve the -surface finish. Cold rolling involves passing the sheets through a series of rollers at room temperature. This process enhances dimensional accuracy, surface smoothness, and mechanical properties.
Surface Treatment: Depending on the desired finish, the stainless steel sheets may undergo surface treatments such as pickling, passivation, or surface polishing. These processes help remove any scale, oxide layers, or contaminants from the surface, resulting in a clean and smooth finish.
Cutting and Slitting: The stainless steel sheets are cut or slit into the desired sizes and dimensions. This step involves various cutting techniques such as shearing, sawing, or laser cutting.
Quality Control and Inspection: Throughout the manufacturing process, quality control measures are implemented to ensure that the stainless steel sheets meet the required specifications and standards. Inspections, including visual inspections, dimensional checks, and mechanical property testing, are conducted to ensure the quality of the sheets.
Packaging and Shipping: The final step involves packaging the stainless steel sheets securely to protect them during transportation. They are then shipped to customers or distributors for further use.
317 and 317LMN Stainless Steel Sheets are specialized grades that offer enhanced corrosion resistance compared to standard austenitic stainless steels. These grades are particularly useful in aggressive environments containing chlorides and other corrosive substances. Here are some common applications for 317 and 317LMN Stainless Steel Sheets:
Chemical Processing: 317 and 317LMN Stainless Steel Sheets are extensively used in chemical processing industries for equipment, vessels, and pipelines that handle corrosive chemicals, acids, and solvents. Their superior corrosion resistance makes them suitable for applications where standard stainless steels may fail.
Petrochemical Industry: 317 and 317LMN Stainless Steel Sheets find use in the petrochemical industry for equipment such as heat exchangers, condensers, valves, and pumps. Their resistance to chlorides, acids, and other aggressive chemicals is crucial in these environments.
Power Generation: These stainless steel sheets are employed in power plants for flue gas desulfurization systems, scrubbers, and other equipment exposed to corrosive gases and liquids. Their corrosion resistance and high-temperature properties make them suitable for these applications.
Pharmaceutical Industry: 317 and 317LMN Stainless Steel Sheets are used in the pharmaceutical industry for equipment, storage vessels, and piping systems that handle corrosive chemicals and sterile environments. Their corrosion resistance and hygienic properties are essential in pharmaceutical manufacturing.
Pulp and Paper Industry: These stainless steel sheets find use in the pulp and paper industry for equipment such as digesters, bleaching equipment, and piping systems. Their resistance to corrosive chemicals and high-temperature environments is beneficial in these applications.
Marine Applications: 317 and 317LMN Stainless Steel Sheets are employed in marine environments, including seawater systems, offshore platforms, and shipbuilding. Their corrosion resistance to chlorides and other corrosive agents is critical in these harsh environments.
Food Processing: These stainless steel sheets are used in food processing equipment, especially in applications where acidic and corrosive ingredients are involved. Their corrosion resistance and hygienic properties make them suitable for use in food processing facilities.
Packaging for stainless steel sheets must be designed to protect the product from physical damage, dust, and moisture during storage and transportation. It varies among manufacturers and is usually tailored to fit the size and quantity of the sheets and the specific requirements of the customer. Here’s a general overview of the packaging process:
Surface Protection: The stainless steel sheets are typically protected with a removable plastic film, which provides a barrier against scratches and other surface damages.
Bundling: The sheets are often stacked and then bundled together. This can be done with narrow strips of metal, plastic straps, or heavy-duty tape. The number of sheets per bundle can vary depending on the size of the sheets and the requirements of the customer.
Stainless Steel Sheet Package 1
Padding: Padding material may be used between sheets to prevent them from scratching each other. This is especially important for sheets with polished or otherwise finished surfaces.
Packing: The bundles of stainless steel sheets are often packed in wooden cases or pallets for added protection. The packing material can also include protective corner covers and edge protectors to safeguard against damage during handling and transport.
Stainless Steel Sheet Package 2
Sealing: The entire package might be shrink-wrapped in plastic to provide protection from dust and moisture.
Labeling: Each package is labeled with the necessary information including product details, size, grade, quantity, etc.
Stainless Steel Sheet Package 3
This is a general approach to packaging, and it can vary depending on the specific supplier or the transportation method. It’s always a good idea to ask your supplier about their packaging methods to ensure it suits your requirements.
As a full-service steel and stainless steel supplier, we also offer a variety of value-added services to adapt our steel to meet your specifications.Those services include loop-slitting, cut-to-length, pickling, temper passing and stretch leveling, coating, painting and other processes.