What is food-grade stainless steel?
Food-grade stainless steel refers to metal materials that comply with the "National Standard of the People's Republic of China / Hygienic Standard for Stainless Steel Tableware and Containers" GB4806.9-2016. During the process of food preparation involving acids and alkalis, stainless steel will not release various alloys or harmful substances.
Specific Standards
Food-grade Stainless Steel
All containers for storing food and food processing machinery should use austenitic or ferritic stainless steel (1Cr18Ni9Ti, 0Cr19Ni9, 1Cr18Ni9, 1Cr17Ni2). For machining parts such as drills and molds, martensitic stainless steel (0Cr13, 1Cr13, 2Cr13, 3Cr13) can also be used.
The specific physical and chemical indicators are as follows:
Item Austenitic Stainless Steel Ferritic Martensitic Stainless Steel
Lead (as Pb), mg/L In 4% acetic acid soak ≤ 1.0 1.0
Chromium (as Cr), mg/L In 4% acetic acid soak ≤ 0.5
Nickel (as Ni), mg/L In 4% acetic acid soak ≤ 3.0 1.0
Cadmium (as Cd), mg/L In 4% acetic acid solution ≤ 0.02 0.02
Arsenic (as As), mg/L In 4% acetic acid solution ≤ 0.04 0.04
Note: Soaking conditions are boiling for 30 minutes, followed by standing at room temperature for 24 hours.
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