Food safety and hygiene are top priorities in the modern food industry. From processing raw materials to packaging finished products, every step demands equipment that is durable, corrosion resistant, and easy to clean. Among the wide range of stainless steel grades available, stainless steel 317L has become a preferred choice for food processing equipment. Its unique chemical composition, superior corrosion resistance, and long service life make it ideal for demanding applications in food production facilities.
This article explores why food industries rely on 317L stainless steel, highlighting its properties, advantages, and the various applications where it plays a crucial role.
Stainless steel 317L is a low-carbon austenitic stainless steel with higher molybdenum content compared to conventional grades such as 304 and 316. Its chemical composition typically includes:
Chromium: 18–20 percent
Nickel: 11–15 percent
Molybdenum: 3–4 percent
Carbon: Maximum 0.03 percent
The increased molybdenum content enhances resistance to pitting and crevice corrosion, while the low carbon minimizes the risk of sensitization and intergranular corrosion during welding.
Enhanced Corrosion Resistance
The high molybdenum content provides better resistance to chlorides and acidic environments compared to 316L, making it suitable for food processing applications where salt and acidic substances are common.
Low Carbon Content
The “L” designation in 317L indicates low carbon, which improves weldability and reduces the risk of carbide precipitation during fabrication.
Strength and Durability
317L maintains excellent mechanical strength and toughness, even at elevated temperatures.
Ease of Fabrication
Like other austenitic stainless steels, 317L can be easily formed, welded, and machined.
Hygienic Surface
Its smooth, non-porous surface prevents microbial contamination and is easy to clean, ensuring compliance with food safety standards.
Food industries frequently handle acidic, salty, and high-moisture environments. From tomato-based sauces to citrus fruits and dairy products, many food items contain compounds that accelerate corrosion. 317L offers:
Excellent resistance to chloride-induced corrosion, preventing pitting in salty environments.
High resistance to organic and inorganic acids, ensuring long-lasting performance in acidic food processes.
Durability is essential in food plants where downtime is costly. 317L’s ability to withstand aggressive cleaning agents, high temperatures, and chemical exposure translates to a longer service life compared to standard stainless steels.
Food processing industries operate under strict regulations such as FDA, EU standards, and HACCP guidelines. Stainless steel 317L’s hygienic surface, ease of cleaning, and corrosion resistance help ensure compliance with these safety requirements.
Food processing equipment must endure frequent cleaning with strong sanitizing agents such as chlorine-based disinfectants, caustic soda, or peracetic acid. 317L provides superior resistance to these chemicals, reducing the risk of surface degradation and contamination.
Stainless steel 317L is used in various food and beverage sectors, from dairy and breweries to meat processing and bakeries. Its versatility ensures equipment reliability regardless of the type of food being processed.
Dairy Industry
Milk storage tanks
Evaporators
Pasteurization equipment
Meat and Poultry Processing
Cutting tables and conveyors
Washing tanks
Sterilization units
Beverage Industry
Brewery fermenters
Juice processing equipment
Beverage storage and mixing tanks
Sauce and Condiment Production
Acidic food mixing vessels
Tomato paste evaporators
Vinegar and citrus juice processing tanks
Bakery and Confectionery
Mixing bowls
Chocolate processing equipment
High-temperature ovens and trays
While 304 and 316L stainless steels are commonly used in the food industry, 317L provides added benefits:
Compared to 304 Stainless Steel
Much higher resistance to chlorides and acids
Longer equipment life in aggressive food environments
Compared to 316L Stainless Steel
Better resistance to pitting and crevice corrosion
More reliable for continuous use in acidic and salty processes
These advantages justify why industries choose 317L despite its slightly higher cost.
Although 317L offers numerous benefits, food industries must consider the following:
Cost: More expensive than 304 and 316L due to higher nickel and molybdenum content.
Availability: Less commonly stocked compared to 304 and 316, requiring specialized suppliers.
Fabrication Expertise: Requires skilled handling during welding and machining to maintain corrosion resistance.
Despite these challenges, the long-term benefits often outweigh the initial investment.
To maximize the lifespan of 317L stainless steel equipment in food processing:
Use appropriate cleaning agents and avoid prolonged exposure to harsh chemicals.
Rinse thoroughly after sanitization to prevent residue buildup.
Conduct regular inspections for early signs of pitting or wear.
Maintain proper welding techniques during fabrication to prevent sensitization.
With increasing emphasis on food safety, hygiene, and efficiency, stainless steel 317L will continue to grow in demand. As food processing becomes more complex and globalized, the need for materials that combine corrosion resistance, strength, and cleanliness will remain essential.
Emerging technologies such as automated cleaning systems and high-pressure sterilization will further highlight the importance of robust stainless steel grades like 317L.
Food industries prefer stainless steel 317L for processing equipment because of its superior corrosion resistance, long service life, and compliance with food safety standards. Its ability to withstand acidic foods, salty environments, and aggressive cleaning agents makes it one of the most reliable materials available.
While it comes with a higher initial cost, the long-term savings in maintenance, downtime, and equipment replacement make it a smart investment.
For reliable sourcing, global manufacturers turn to trusted suppliers such as sakysteel, who provide certified stainless steel materials that meet international quality standards. By partnering with companies like sakysteel, the food industry ensures that equipment is built to last, safe to operate, and capable of meeting the toughest demands.