Food-grade 304 stainless steel, also known as SUS304, belongs to the austenitic stainless steel series. Its core advantage lies in its precise chemical composition-containing 18%-20% chromium and 8%-10.5% nickel, along with strictly controlled levels of impurities such as carbon, manganese, phosphorus, and sulfur. This gives it core characteristics such as corrosion resistance, easy cleaning, and no harmful substance leaching, fully meeting the safety requirements for food contact materials. It is also one of the most widely used food-grade stainless steel materials globally.
Why is food-grade 304 stainless steel safe?
1. Strict chemical composition control, eliminating risks at the source.
|
Element |
Content Range (%) |
Function/Restriction Description |
|
Chromium (Cr) |
18.0-20.0 |
Forms a passive film, improves corrosion resistance and prevents rusting |
|
Nickel (Ni) |
8.0-10.5 |
Stabilizes the austenitic structure and enhances toughness and corrosion resistance |
|
Carbon (C) |
≤0.08 |
Control content to avoid affecting corrosion resistance and safety |
|
Phosphorus (P) |
≤0.045 |
Harmful impurity, strictly limit content to prevent precipitation |
|
Sulfur (S) |
≤0.03 |
Harmful impurity, excessive content will affect material safety and toughness |
|
Iron (Fe) |
Balance |
Matrix element, non-toxic and harmless, ensuring material strength |
2. Authoritative standard certification. Chinese standard: GB 4806.9-2023 "Metallic Materials and Articles for Food Contact," this is my country's latest implemented standard for food contact metal materials, clearly specifying the chemical composition, migration tests, and hygiene requirements of the materials. The migration limit for 304 stainless steel is ≤0.05mg/dm², far below the dose harmful to the human body.
International Standards: The ASTM standard (304 grade corresponds to 06Cr19Ni10 in my country's GB/T 20878) and the EN 10088 standard are both highly recognized globally. Food-grade 304 stainless steel that passes their testing can be exported to many countries and regions worldwide.
3. Excellent Material Properties
Strong Corrosion Resistance: Resistant to common corrosive media such as weak acids, weak alkalis, and salt spray. It will not rust or corrode upon contact with vinegar, soy sauce, fruit juice, or other foods, preventing the release of harmful substances due to material damage.
Smooth and Easy-to-Clean Surface: The smooth surface of the material does not easily retain food residue and bacteria. Daily cleaning is sufficient to maintain hygiene, reducing bacterial growth and meeting the hygiene requirements of food processing environments.
Good Processing Performance: Can be made into various forms such as tableware, storage tanks, pipes, and workbenches, suitable for different scenarios such as homes, restaurants, and food processing. No toxic or harmful substances are generated during processing.
Fake 304 stainless steel is the source of safety hazards.
These fake 304 products have three main characteristics that should raise red flags:
Improper labeling: Only labeled "304," without a unified numerical grade or standard number, and unable to provide a material testing report.
Substandard materials: Insufficient nickel and chromium content, or use of recycled materials or inferior stainless steel with excessive impurities. Poor corrosion resistance, prone to rusting, and leaching of heavy metals.
Abnormally low price: Much cheaper than genuine 304 stainless steel products. You get what you pay for; excessively low prices often indicate substandard materials.
Core application scenarios for food-grade 304 stainless steel:
Household scenarios:** Stainless steel tableware, thermos flasks, kettles, cutting boards, sinks, etc., directly contacting food. Safe, odorless, easy to clean, and suitable for daily dietary needs.
Food Service Scenarios: For restaurant kitchens, stovetops, exhaust hoods, sinks, storage cabinets, and tableware sterilization equipment, as well as workbenches and containers in milk tea and coffee shops, high-frequency use, easy cleaning, and corrosion resistance are required. 304 stainless steel is the optimal choice.
Food Processing Scenarios: For food processing plants, mixing tanks, storage bins, conveyor belts, work surfaces, and pipes, valves, and reactor linings in beverage, dairy, and brewing production lines must meet strict food hygiene standards. 304 stainless steel can meet long-term stable use requirements and is easy to sterilize without residue.
Other Scenarios: Food-grade 304 stainless steel is also commonly used for contact containers and pipes in the pharmaceutical, drinking water, and bioengineering industries, as well as for electronic products that come into contact with the human body, balancing safety and durability.
If you have purchasing or customization needs for food-grade 304 stainless steel (bulk purchases preferred), whether it's tableware, kitchenware, food processing equipment, or stainless steel sheets and pipes, we can provide you with standard-compliant products. Direct from the source factory, eliminating intermediaries, ensuring controllable quality, and offering competitive prices. Customization is supported, and free samples are available. Feel free to leave a message or send a private message to inquire. We will provide you with professional solutions and quotes as soon as possible!
