1. 304 Stainless ≠ Food-Grade Stainless
- “304” and “316” are just grades, not automatically food-safe.
- True food-grade stainless must comply with China National Standard GB4806.9-2016, ensuring no harmful metals leach out.
- Formula: Food-grade = 304/316 + GB4806.9-2016 certification.
2. How to Choose Safely?
✅ Check standard: Must show GB4806.9-2016 on packaging
✅ Buy trusted brands: Clear info on manufacturer & material
✅ Compare weight: Genuine food-grade feels heavier
❌ Don’t trust “testing liquids” sold online
3. 304 vs 316
- 304: Common, corrosion-resistant, affordable; good for daily bowls, cups
- 316: Contains molybdenum (Mo), stronger corrosion resistance; suitable for high-heat cookware & medical tools
4. Usage Taboos
❌ Don’t store vinegar, soy sauce, or salt long-term
❌ Don’t wash with strong alkali or bleach
❌ Don’t cook herbal medicine in it
❌ Don’t heat it empty
👉 Takeaway: Always look for GB4806.9-2016 food-grade certification for true safety.
