sus304 vs sus316 for food

Both SUS304 and SUS316 stainless steels are widely used in the food industry, but their suitability differs, especially in terms of corrosion resistance.

Is SUS304 stainless steel food grade?

SUS304 stainless steel (also known as AISI 304) is one of the most common food-grade stainless steels, widely used in food processing, storage, and transportation equipment due to its excellent corrosion resistance, good weldability, and oxidation resistance. Its chemical composition includes 18% chromium and 8% nickel, which gives it good corrosion resistance and high-temperature performance. SUS304 performs well in most food contact environments, but its corrosion resistance is relatively poor in high salt or acidic environments.

 

Is SUS316 stainless steel food grade?

SUS316 stainless steel (AISI 316) is considered a higher-grade food-grade stainless steel, especially suitable for environments with more stringent corrosion resistance requirements, such as marine and chemical processing applications. SUS316 stainless steel's addition of molybdenum (Mo) enhances its resistance to chloride corrosion, making it ideal for contact with seawater, acidic foods, and high-temperature, high-pressure applications. Its chemical composition includes 16% chromium, 10% nickel, and 2% molybdenum, which gives SUS316 superior corrosion resistance and antibacterial properties compared to SUS304, making it suitable for more demanding food safety standards and requirements.

 

SUS304 vs. SUS316 Food-grade stainless steel:Chemical Composition

Element	304 SS	316 SS
Chromium (Cr)	17.5–20.0 %	16.0–18.5 %
Nickel (Ni)	8.0–11.0 %	10.0–14.0 %
Molybdenum (Mo)	0 %	2.0–3.0 %

 

SUS304 vs. SUS316 Food-grade stainless steel:Corrosion Resistance

Grade 304 food-grade stainless steel is a widely used and economical material suitable for general food and beverage processing applications. It offers good corrosion resistance to most oxidizing acids and is not easily corroded in standard processing environments. Grade 316 food-grade stainless steel has superior resistance to pitting and crevice corrosion, making it suitable for seafood processing, processing of acidic foods such as citrus or tomatoes, and facilities using strong clean-in-place (CIP) systems.

 

SUS304 vs. SUS316 Food-grade stainless steel:Durability and Strength

304 stainless steel can withstand frequent cleaning, physical wear, and daily mechanical stress in food industry environments. 316 stainless steel is even more durable, especially under harsh conditions or when equipment is exposed to strong chemicals or continuous use.

 

SUS304 vs. SUS316 Food-grade stainless steel:Hygiene and Ease of Cleaning

Both 304 and 316 stainless steel are non-porous, easy to clean, and resistant to bacterial growth. Their smooth, polished surfaces make them ideal for hygienic applications and help meet food safety standards. In fact, there is virtually no difference between the two in terms of hygienic performance.

 

Is 304 or 316 stainless steel better for food?

Both 304 and 316 stainless steel are food-grade stainless steels, but due to the addition of molybdenum, 316 stainless steel has superior corrosion resistance. Therefore, it is ideal for applications involving salty or acidic foods, marine environments, and the use of strong cleaning agents. 304 stainless steel, on the other hand, is more economical and sufficient for general food processing needs, suitable for most everyday kitchenware, cookware, and standard food handling equipment.
The choice of stainless steel depends on the degree of exposure to chlorides (salt), acids, and cleaning agents; under more demanding conditions, 316 stainless steel provides better long-term reliability. 

 

If you have project requirements for SUS304 and SUS316 stainless steel, we welcome your order. GNEE has a large inventory of popular products for you to choose from. These materials can be processed into various practical product forms, including plates, coils, tubes, bars, and wires. For detailed chemical composition information and free samples, please contact our factory immediately. We offer competitive prices and excellent service.Email: info@gneestainless.com