Stainless Steel Thermos Cup To Buy 304 Or 316?

There are many kinds of materials for thermos cups, but the most durable and most economical is stainless steel.

In the process of buying stainless steel, it is not difficult to find that the current stainless steel vacuum flasks on the market are divided into 304 stainless steel and 316 stainless steel. Even the thermal mug with 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 more expensive by nearly half.

From the price point of view, 316 stainless steel is definitely better. But we not only want to buy good, but also to buy affordable. 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, and has considerable corrosion resistance and high temperature resistance. It is widely used as stainless heat-resistant steel.

316 stainless steel has better acid and alkali resistance and high temperature resistance than 304, and is mainly used in the 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 to 18 percent , but the average nickel content of 304 stainless steel is 9 percent , while the average nickel content of 316 stainless steel is 12 percent . Nickel in metallic materials can improve high temperature durability, mechanical properties and oxidation resistance of materials. Therefore, the content of nickel in the material directly affects the comprehensive properties of the material.

In our daily life, we commonly have pots, bowls, scoops, pots, shovels, spoons, and thermos cups, etc. These daily necessities usually use 304 stainless steel materials. Generally speaking, 304 stainless steel is enough in our daily life. Because 304 stainless steel is characterized by acid and alkali resistance and high temperature resistance. The tableware we usually use is acid and alkali corrosion, so we just need to be able to resist acid and alkali.

Stainless steel vacuum flasks have been widely used in our daily life, but there is still a lot of understanding about the choice of stainless steel vacuum flasks.

For example, when we buy thermos cups, 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 must meet the standard of heavy metal precipitation, while ordinary 304 stainless steel has not undergone these tests, so when purchasing, 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, etc.