Comparison Table of Stainless Steel 3 16 and 304
Stainless steel generally takes iron as the main component, and some metal elements such as carbon compounds, nickel and chromium are added. Generally, the content of these rare metals is used to evaluate the grade of stainless steel. The common method for evaluating stainless steel grades is American standard ASTM formulated by American Iron and Steel Association, and 304 and 3 16 stainless steel grades are all formulated according to this method.
I first introduce these two kinds of stainless steel, and then focus on comparing these two kinds of stainless steel, and give suggestions on the selection of vacuum flask materials.
First, 304 stainless steel
304 stainless steel is the most common stainless steel brand in our life. Most stainless steel tableware, stainless steel spoons and cups are made of this material. This kind of stainless steel has more contact with acid and alkali, so it has good acid and alkali resistance, high density and beautiful polishing.
Fu Guang mugs are made of 304 stainless steel.
Second, 3 16 stainless steel
Compared with 304, 3 16 stainless steel contains a rare metal called molybdenum, which can make 3 16 have better corrosion resistance than 304. Therefore, it is generally used in dietotherapy, machinery, heavy industry or making parts in high temperature environment.
Fu Guang mugs are made of 3 16 stainless steel.
Third, comparison.
1. Material composition and corrosion resistance
3 16 stainless steel contains More rare element mo than 304, which makes 3 16 stainless steel much better than 304 in corrosion resistance, oxidation resistance and high temperature resistance. For example, common foods will not corrode 304 stainless steel, but some special foods, such as carbonated drinks, white vinegar, coffee and so on. 304 stainless steel will go downhill. Use 3 16 stainless steel at this time. This kind of stainless steel containing molybdenum has much better corrosion resistance than ordinary stainless steel, and it will not be corroded when used to contain any food, and its oxidation resistance and corrosion resistance are better. Therefore, 3 16 stainless steel thermos cup can hold more kinds of liquids.
2. Density and hardness
The density of 3 16 stainless steel is 8.03g/cm3, and that of 304 stainless steel is 7.93g/cm3. The density of 3 16 stainless steel is higher than 304, which is more suitable for wear in harsh environment. The service life of 3 16 thermos cup may be longer. On the other hand, stainless steel 304 is more malleable and can be easily made into various daily appliances in life.
3. Price and use
The price of 3 16 stainless steel plate is about 2 1000 yuan/ton, while the price of 304 stainless steel plate is about 15000 yuan/ton, so whether it is a plate or a finished household appliance, 3 16 stainless steel and its application equipment are more expensive than 304, and some are even several times more expensive. Because of its own material and price, 304 stainless steel is generally only used for daily utensils, such as pots and pans, while 3 16 stainless steel is mostly used in medical, mechanical and other industries, and there are also some edible utensils.
Four. Suggestions and precautions
First of all, if you choose daily thermos cups, pots and pans, etc. It is best to choose 3 16 stainless steel, which has stronger corrosion resistance; Of course, 304 stainless steel can also be directly used, which has relatively high cost performance and low life requirements. The use of 304 stainless steel will not cause any harm; However, it is best to use 3 16 stainless steel for special instruments in medical and medical industries. In addition, it should be noted that when choosing stainless steel tableware, you must choose food-grade stainless steel, that is, it has the logo of GB 4806.9-20 16. GB 4806.9-20 16 is the national standard of stainless steel tableware, which clearly stipulates what standard stainless steel in contact with food should meet. 304 stainless steel is the lowest grade of stainless steel that meets the standard.