Stainless Steel Vacuum Flask To Buy 304 Or 316?
Nov 18, 2021
There are many kinds of materials for the thermos, but the most durable and economical one depends on stainless steel.
In the process of buying stainless steel, it is not difficult to find that the stainless steel vacuum cups currently on the market are divided into 304 stainless steel and 316 stainless steel.
Even the thermos cup with exactly the same appearance has two options of 304 and 316. Among them, the price of 316 stainless steel is more expensive than that of 304, and some are even nearly half expensive.
From the price point of view, 316 stainless steel is definitely better. But we must not only buy good ones, but also affordable ones. When 304 stainless steel vacuum flask meets 316 stainless steel vacuum flask, which one is more worth buying?
304 stainless steel is austenitic stainless steel, which cannot be strengthened by heat treatment, cannot be quenched like carbon steel, and is non-magnetic. 304 has excellent mechanical properties, has considerable corrosion resistance and high temperature resistance, and is widely used as a stainless steel heat-resistant steel.
316 stainless steel has better acid and alkali resistance and high temperature resistance than 304, and is mainly used in food industry and surgical instruments. In addition, 316 stainless steel has a remarkable feature, that is, there is basically no thermal expansion and contraction, which is extremely important for precision parts.
The chromium content of 304 stainless steel and 316 stainless steel is about 16-18%, but the average nickel content of 304 stainless steel is 9%, and the average nickel content of 316 stainless steel is 12%.
Nickel in metal materials can improve the high-temperature durability, mechanical properties and oxidation resistance of the material. Therefore, the content of nickel in the material directly affects the overall performance of the material.
In our daily life, we commonly have pots, bowls, scoops, basins, shovel, spoons and thermos cups, etc. These daily necessities usually use 304 stainless steel. Generally speaking, 304 stainless steel is sufficient for our daily life. Because 304 stainless steel is characterized by acid and alkali resistance and high temperature resistance. The tableware we usually use is corroded by acid and alkali, so we only need to be able to resist acid and alkali.
Stainless steel vacuum flask has been widely used in our daily life, but there is still a lot of knowledge about the choice of stainless steel vacuum flask.
For example, when we buy a vacuum flask, we mainly look at the words "GB9684" on the package or whether there is "SUS304" on the cup. We need to buy tested stainless steel products.
Because food grade 304 stainless steel is required to meet the heavy metal precipitation standard, and ordinary 304 stainless steel has not undergone these tests, so when you buy, you must carefully check the brand on the package.
304 stainless steel is enough for general food. If your demand only stays at this stage, it is enough to choose 304 stainless steel with a lower price.
If you need to hold some more acidic foods, it is recommended to choose 316 stainless steel. What kind of food falls into this category? Such as carbonated drinks, dairy products and so on.
