All stainless steel cutlery food grade and 304 are completely different
E-BON E-BON 2018-07-13 10:15:15
Electric kettle, as an indispensable part of the home life, whether it is drinking water, making tea, ironing, in our daily life will be in close contact with our body, the quality of electric kettle is safe, it becomes an unacceptable Lost things. However, its structure is very simple, small workshops, small factories can be manufactured, there are many cottage manufacturers in the market, and the black heart JS has done illegal work. To this end, our consumers should also understand these tricky places, arm themselves and avoid being deceived. Today, let's talk about the metal material of the electric kettle.
The working principle of the electric kettle is actually very simple. The electric resistance is generated by the electric resistance wire, and the heat is transferred to the body through the metal plate to heat the cold water. When the water boils, the temperature sensing element monitors the water vapor, and after reaching the boiling water temperature, the power is automatically turned off, and the heating of the kettle is stopped. The price of the electric kettle on the market starts from the lowest 19 pieces, up to 200 pieces, and there are many choices. Is this 10 times price difference and the product quality difference 10 times? The reason why the price difference in the market is so large is mainly due to the stainless steel liner material and the temperature sensing element. These two aspects determine the quality of the electric kettle and the cost price, and it is also the place where the profiteers like to cut corners.
Let's talk about the stainless steel inner pot of the electric kettle. From the general products on the market, the commonly used stainless steel materials are divided into 304 stainless steel, food grade 304 stainless steel, 201 stainless steel and other stainless steel. The difference between steel and processing requirements is different, and the better quality will inevitably have higher production. Process requirements.
304 stainless steel is a versatile stainless steel that is widely used to make equipment and parts that require good overall performance (corrosion resistance and formability). 304 stainless steel is a grade of stainless steel produced in accordance with American ASTM standards. 304 stainless steel contains 19% chromium and 9% nickel. 304 is the most widely used stainless steel, heat-resistant steel for food production equipment, Xitong chemical equipment, nuclear energy and so on. 304 stainless steel chemical composition specifications chemical composition: C: ≤ 0.08, Si: ≤ 1.0 Mn: ≤ 2.0, Cr: 18.0 ~ 20.0, Ni: 8.0 ~ 10.5, S: ≤ 0.03, P: ≤ 0.035 N ≤ 0.1
Food grade stainless steel, also known as "GB9864 stainless steel", is the stainless steel material specified in GB 9684-2011 under the National Standard of the People's Republic of China / Sanitary Standard for Stainless Steel Food Containers. The lead content of this stainless steel is lower than that of ordinary stainless steel. Much more, the product's anti-corrosion performance has also increased, the requirements are: lead (in Pb), mg / L 4% acetic acid soaking solution ≤ 1.0 1.0. Chromium (in terms of Cr), mg / L 4% acetic acid soaking solution Medium ≤ 0.5. Nickel (in terms of Ni), mg/L 4% acetic acid soaking solution ≤ 3.01.0. Tin (in terms of Sn), mg/L 4% acetic acid solution ≤ 0.02 0.02. Arsenic (as As), mg/L 4% acetic acid solution ≤ 0.04 0.04. Note: The soaking conditions are all boiled for 30 min and then at room temperature for 24 h.
201 stainless steel contains less nickel, less chromium, weaker anti-corrosion performance, more manganese, good acid and alkali resistance, and cheaper price! In order to maintain the corrosion resistance inherent in stainless steel, 201 stainless steel must contain more than 16% chromium and more than 8% nickel. The surface is very bright with dark light, and the manganese is high and easy to rust. 304 contains more chromium, the surface is matte and does not rust. The two are put together and there is comparison. The most important thing is the different corrosion resistance. The corrosion resistance of 201 is very poor, so the price is much cheaper. And because 201 contains low nickel, the price is lower than 304, so the corrosion resistance is not as good as 304.
Differentiating these different stainless steel materials, the method in the laboratory is mainly to detect the composition of the material, and the stainless steel of different materials will have obvious differences in the metal composition. For ordinary consumers, this method is too professional and not suitable, and the most suitable is to use 304 manganese content tester, only need to drop on the surface to be able to detect whether the material is excessive in manganese content, thus distinguishing 201 stainless steel And 304 stainless steel, and for the difference between ordinary 304 stainless steel and food grade stainless steel, more detailed laboratory testing is needed to distinguish. But we need to know that the requirements for food grade stainless steel are the most stringent, while industrial stainless steel is much simpler.
In general: food grade stainless steel refers to stainless steel material that meets the national GB9684 standard and can be in contact with food without causing physical harm. GB9864 stainless steel is in accordance with the national GB9684 standard certified stainless steel material, so GB9864 stainless steel is food grade stainless steel. . At the same time, the so-called 304 stainless steel is not required to pass the national GB9684 standard certification, 304 stainless steel is not equal to food grade stainless steel, 304 stainless steel is not only used in kitchen utensils, but also widely used in industry, the hazard to the human body is unknown. At the time of purchase, regular products will be marked with “food grade 304 stainless steel”( Stainless Steel Ice Cream Spoon supplier china) on the surface and inner wall of the product, and the product labeled “food grade – GB9684” will be safer.