Does 316 stainless steel tableware harmful to humans?
No.
304 stainless steel is the most widely used stainless steel material in daily life. It is a food-grade material. It is very safe for drinking water and making tableware. 316 stainless steel has been upgraded on the basis of 304, such as controlling the proportion of impurities. , Add molybdenum and so on. It has stronger corrosion resistance and can withstand various strong acids and alkalis. Compared with 304 stainless steel, 316 stainless steel is more resistant to high temperature and corrosion. It is a medical grade material. It is safer for daily contact with food and will not be harmful to the body. Therefore, the use of 316 stainless steel vacuum flask is not harmful to the human body. But pay attention to the method of use, only the correct use can ensure good health. The anti-corrosion and anti-rust performance of 304 stainless steel 304 is already very strong. It is a food-grade metal approved by national standards. There is no problem with normal contact with water, tea, coffee, milk, oil and salt.
In addition, 316 stainless steel is more adaptable to the environment. The temperature is too high or too low will not affect the corrosion resistance of 316 stainless steel. Therefore, the cost is slightly higher. Therefore, if the price is not much different, you can choose 316 stainless steel vacuum flask, otherwise 304 stainless steel vacuum flask is preferred.
Precautions:
Salt and vinegar are not suitable: Table salt and vinegar will destroy the passivation layer on the surface of stainless steel, dissolve the chromium element in it, and release toxic and carcinogenic metal compounds.
It is not advisable to use strong alkaline materials for cleaning: Do not use strong alkaline or strong oxidizing chemicals to wash stainless steel tableware. Because these substances are strong electrolytes, they will react electrochemically with stainless steel.
According to the national food safety standard of the People’s Republic of China on food contact metal materials and products (GB 4806.9-2016), it is clearly stipulated that stainless steel tableware containers and food production and operation tools and equipment should be made of austenitic stainless steel and austenitic stainless steel. Stainless steel materials such as ferritic and ferritic stainless steel, ferritic stainless steel and martensitic stainless steel.
In this national standard, a migration test is specified. The stainless steel material is immersed in a solution that simulates food (usually an acid solution). After the specified time is reached, it is tested whether there are harmful elements in the solution: including arsenic and cadmium. As long as the five elements in the test solution do not exceed the specified values in the above table, the materials can be declared as food-grade stainless steel.
When we buy tableware (in fact, “tableware” is not standard, it should be “stainless steel in contact with food”), we should mainly look at whether there is “GB4806.9-2016” on its packaging, only products that have been tested , We can buy with confidence.
At present, when visiting various e-commerce websites or physical stores, the most commonly seen food-grade stainless steel products are 304,316L; because 316L contains Mo (molybdenum), it is more corrosion-resistant than 304, and is more advanced and more expensive than 304, so 316L is used Kitchenware made of stainless steel as a material will be promoted by businesses as a selling point. In fact, in addition to 304, 316L stainless steel, 201, 430 and other types of stainless steel can also be used in kitchen utensils. I hope that it will not be misunderstood by non-professionals. It should be noted that the material of “4 series” is higher than that of “3 series”. Different materials have their own characteristics. In addition to the price and cost, consumers can have a variety of choices under the premise of national standard for safety protection. .