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What's the difference between 316, 304 and 201 stainless steel used into making vacuum flasks / thermos?

Posted on2 Years ago by 3233

There are many different kind of vacuum flasks on the market, ranging in price from tens of dollars to several hundred dollars. So why are the prices of these vacuum flasks so different?


One of the key factors is which stainless steel is used in these vacuum flasks. These stainless steels are divided into three types, 201, 304 and 316 stainless steel. What is the difference between them? Table below show the comparison between 316, 304 and 201 Stainless Steels:


Type

Characteristics

Cost

316

Strong acid and alkali resistance, better oxide corrosion resistance

High

304

Corrosion resistance and stamping performance are generally far better than 201

Moderate

210

Easy to oxidize and rust

Low

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