Depends on the usage scenario
Core conclusion: 316 stainless steel is better than 304 stainless steel in corrosion resistance (especially chloride environment), but the price is higher; 304 stainless steel is more cost-effective and suitable for daily household needs. Both are food-grade safety materials and need to be selected according to the specific usage scenario.
Key comparison dimensions
- Chemical composition difference
304 stainless steel: Contains 18% chromium, 8% nickel, no molybdenum, suitable for general environment.
316 stainless steel: Add 2-3% molybdenum to 304, significantly improve the ability to resist chloride ion corrosion, suitable for harsh environments such as acid and salt spray.
- Corrosion resistance performance
Daily environment (such as home kitchen): 304 stainless steel fully meets the needs and is cheaper.
Special environment (such as seaside, chemical, medical): The life of 316 stainless steel can reach more than 3 times that of 304, reducing the risk of metal ion precipitation.
- Price and cost-effectiveness
The raw material cost of 316 stainless steel is about 30-50% higher than that of 304, and the price difference of the end product is more obvious.
Recommendation: Choose 304 stainless steel for ordinary thermos cups and tableware, and 316 stainless steel is preferred for long-term storage of acidic beverages or coastal areas.
- Health and safety
Both meet FDA standards and food-grade stainless steel requirements, and there is no health risk under normal use.
Under extreme conditions (such as long-term contact with strong acids/salts), 316 is safer because it is more corrosion-resistant.
Purchase suggestions
Scenarios where 304 is preferred: daily drinking water cups, pots, and tableware at room temperature.
Scenarios where 316 must be selected: baby bottles, medical equipment, seaside building components, and chemical equipment.
Tips for avoiding pitfalls: Check the product logo (such as "SUS304" or "SUS316") to avoid unlabeled products; use a magnet test (both are non-magnetic) to assist in determining the authenticity of the material.
