304 and 316 stainless steel thermos, which is better?

Monday, Oct,24th 2022

As the weather turns cooler, thermos cups have begun to attract people's attention.

Every time the weather is cold, the life of a thermos cup begins in the office, and even when I usually go to a meeting, one person holds a thermos cup.

Now the more common thermos cups on the market are made of stainless steel, and stainless steel thermos cups can be mainly divided into 304 stainless steel and 316 stainless steel.

When you buy thermos cups, you can also find that the price of thermos cups on the market also ranges from tens of dollars to hundreds of yuan. So which one is better, 304 or 316 stainless steel thermos? It is recommended that everyone buy a thermos, not just the price.

The material of the thermos cup

When buying a thermos cup, the first thing everyone should pay attention to is the material used in the thermos cup. If the material is not safe, then using the thermos cup to drink water every day will easily have a certain impact on our health, so everyone must Choose a thermos that is made of material that is safe enough.

The common stainless steel thermos cups on the market are mainly 304 and 316 styles, but in fact, there is also 201 stainless steel.

However, 201 stainless steel is industrial grade and cannot be in direct contact with food, so you also need to pay attention when buying a thermos cup. If it is marked with 201 or there is no mark, it is recommended not to buy it.

Both 304 and 316 stainless steel can be in contact with food, and they are both stainless steel materials that can be used to make thermos cups.

Among them, the corrosion resistance of 316 stainless steel will be stronger, and the natural price will be more expensive.

According to our normal use needs, in fact, we only need to choose food-grade 304 stainless steel thermos.

316 stainless steel is more expensive, and the hardness is softer than 304. Although the internal corrosion performance is stronger, it is actually not cost-effective.

If you often put milk, coffee and other beverages in the thermos, you can consider choosing 316 stainless steel material, but if you only place some hot water daily, you can directly choose 304 stainless steel material.

In addition, I want to remind everyone that do not buy 304L or 316L stainless steel thermos cups. If there is an L on it, it means that the carbon content in it is relatively low, and it is prone to the problem of weak welding.

Inner liner process of thermos cup

Many friends are also more concerned about the production process of the inner tank when they buy a thermos.You can also find that there are some gaps on the inner liner of some thermos cups on the market, while some have no gaps on the inner liner. Everyone may think that a seamless liner will be better, but in fact, this statement does not Not exactly.

The seamless liner is to smash a large iron block in the shape of a cup after laying a steel plate to smash the steel plate into the shape of a cup.

The thermos made in this way does not have any gaps, but compared to welding, this stamping technique is actually simpler.

In terms of liner technology, I don’t think it is necessary for everyone to care too much about whether the liner is welded or medium pressure, because the structure of the stainless steel vacuum flask is also very simple, and there will be no unstable weldability at all. There is no problem of water leakage in any process.

Insulation effect

When buying a thermos cup, you should naturally pay attention to its insulation effect. If the insulation effect is not good, the hot water we pour in may become cold after a period of time, and it will not be of much use.

And some thermos cups with sufficient thermal insulation effect can be used directly for about 12 hours, so that the thermal insulation effect is better, and it can better meet our needs.

The first place that affects the thermal insulation effect is the lid of the cup.

It seems that the cup lid is small, but if the cup lid is a plastic shell and the thickness is relatively small, the thermal insulation performance of the entire thermos cup will be greatly reduced, which will affect the thermal insulation effect.

It is recommended that you choose a thermal mug with a screw cap. This kind of cap is generally a multi-layer design, so the thermal insulation effect will be better.

In addition, the inner liner of the stainless steel thermos cup may also affect its thermal insulation effect.

It is recommended that you choose a liner with a ceramic coating, which not only has a stronger thermal insulation ability, but also has a better anti-corrosion effect.

In addition, there are various styles of so-called multi-layer liner, plated liner, etc. on the market now. You also need to pay attention when purchasing, the thermal insulation effect of different liner materials is different.

Write at the end:

It is not to say that the more expensive the stainless steel thermos cup, the better the thermal insulation effect. When you buy a stainless steel thermos cup, there is no need to pay too much attention to the price. Just pay attention to the material of the thermos cup and the design of the liner.