How to determine the safety of food grade stainless steel material?

What is 304 stainless steel? Is the manganese content in stainless steel really so awesome? What is safe food grade stainless steel?

1. 304 stainless steel is a common stainless steel material, density of 7.93g /cm3, also known as 18/8 stainless steel in the industry. High temperature resistance 800 degrees, has the characteristics of good processing performance, high toughness, widely used in industry and furniture decoration industry and food and medical industry.

304 is a kind of universal stainless steel, it is widely used in the production of equipment and parts requiring good comprehensive performance. In order to maintain the corrosion resistance inherent in stainless steel, steel must contain at least 18% chromium and at least 8% nickel. 304 stainless steel is a brand of stainless steel produced according to ASTM standards.

2. According to the standard requirements of GB 3280, the chemical grade of 304 stainless steel is 06Cr19Ni10 old grade (0Cr18Ni9) containing 19% chromium, 8-10% nickel and no more than 2% manganese. Therefore, in the test of GB 3280 standard, the engineer will judge the stainless steel, the metal content meets the requirements of 304 grade in the standard requirements, the stainless steel material is 304 stainless steel.

3. 304 stainless steel is food grade stainless steel? Of course not. Food grade stainless steel is in line with the "People's Republic of China National Standard/Stainless Steel food containers health Standard" GB 9684-2011 provisions of stainless steel material, its lead content is much lower than the general stainless steel. Food grade stainless steel refers to the part of food machinery contact food, must meet certain food safety requirements.

First, the stainless steel kettles and other similar appliances on the market at present, the use of high manganese steel material this piece, what is the national standard?

In fact, in the existing national standards, there are provisions, food containers used in the stainless steel, it should be selected: should choose Austenitic stainless steel, ferrous stainless steel and other in line with the relevant national standards (here should refer to GB/T 3280-2007 standard) of stainless steel materials manufacturing. High manganese steel is not in the range of food containers should be selected, so from the judgment of food safety, strictly speaking, high manganese steel can not be used as the material of food containers. High manganese steel is mainly used in heavy industry.

Two, whether high manganese steel food containers are harmful to human body? What is the principle of harm? Dr. Qu Junxiong of the University of Chinese Medicine said that heating food containers will dissolve the manganese in them. Is this correct? Will the dissolved manganese be ingested and absorbed by the human body, and will there be damage to the nervous system leading to memory decline?

Manganese is an essential trace element for human body. Therefore, in this area, it was generally believed that manganese is harmless to human body, and it is only regarded as an index of sensory traits in China. In fact, if the stainless steel products of relevant national standards are used, the migration level of manganese will not cause health damage. Therefore, in GB 9684-2011 "National Standard Stainless Steel Products for Food Safety", quantitative indicators are not given for the migration amount of manganese, but only for the migration amount of lead, chromium, nickel, cadmium and arsenic.

At the same time, the state is paying more and more attention to the safety indicators of hazardous substances in small household appliances. The Administration Measures for the Restricted Use of Hazardous Substances in Electrical Appliances and Electronic Products (ROHS 2.0), which came into effect on July 1, clearly stipulates the reduction and restriction of the use of lead, cadmium, mercury and other hazardous substances in electrical appliances and electronic products, so as to ensure the safety of small household appliances to a greater extent.

Three, other stainless steel material is safe? Why? Please give some tips to the consumers.

Stainless steel is a good material for household appliances and utensils, which has the advantages of firmness, durability, easy cleaning and high temperature resistance. More widely used in the country is 304 and 430 two kinds of steel, generally 430 stainless steel is mainly used as food processing tools, grinding tools and tableware, 304 stainless steel is often used in the production of kitchen appliances, this is in line with national standards, the use of this kind of steel in line with the standard of household appliances, it is safe.

How to choose:

1. look at the appearance and identify the product identification, including: enterprise name, address, specifications, models, trademarks, voltage parameters, power parameters, power nature of the symbol; Try to choose a material description of the product, such as PP plastic material, 304 or 430 stainless steel material.

2. look at the "CCC" logo, electric food processing equipment is a national mandatory certification of products (3C certification), so consumers must see when buying electric food processing equipment is marked with CCC certification mark, whether to obtain "CCC" certification certificate.

3. look at the material, good stainless steel surface is mostly mirror or processed into a unified uniform grain, water wash water flow down. Poor stainless steel surface processing is rough, messy, color and color is not unified. Plastic material should be smooth, stiff, should not be deformed, no odor, bright color plastic electric kettle is best not to choose.

4. Choose famous brands, products with "three guarantees" service commitment, and famous e-commerce platforms with "three guarantees" service commitment.