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Why choose 304 stainless steel tableware?

2019-04-27

20190428160343


How do stainless steel products become more and more?

Is stainless steel so good?

Why does stainless steel rust?

Stainless steel is poisonous, is it true?

When introducing Stainless Steel Cutlery to consumers, there are always many people who ask similar questions. In fact, among the materials we see, stainless steel is almost the only healthy material that can be implanted into the human body.

In view of the fact that many people have misunderstood stainless steel, today we will give you some science about stainless steel.


What is stainless steel?

We often say that stainless steel, not only refers to a kind of stainless steel, but also means more than one hundred kinds of industrial stainless steel. Each stainless steel developed has good performance in its specific application field.

Scientific research has proved that stainless steel has bactericidal and antimicrobial effect, which can not only kill the microorganisms, but also inhibit the growth and reproduction of microorganisms. So now it has become a common dishware in family tableware, and even has the trend of replacing ceramics.

How did stainless steel come into being?

The invention and use of stainless steel dates back to the First World War. British scientist Henry Berkley was commissioned by the British government military arsenal to study the improvement of weapons. At that time, the rifle guns used by the soldiers were extremely wearable, and Berkley wanted to invent an alloy steel that was not easy to wear.

The stainless steel invented by Berkley obtained British patent rights in 1916 and began mass production. Since then, stainless steel accidentally discovered from garbage dumps has swept the world, and Henry Berkley is also known as the "father of stainless steel."

Classification of Stainless Steel

Stainless steel is often classified according to the state of the organization: martens tic steel, ferrite steel, austenitic steel, austenitic-ferrite (duplex) stainless steel and precipitation hardened stainless steel.

According to the composition, it can be divided into chromium stainless steel, chromium-nickel stainless steel and chromium-manganese-nitrogen stainless steel. There is also a special stainless steel for pressure vessel "GB24511_2009 stainless steel plate and strip for pressure equipment".


Why use 304 stainless steel for stainless steel tableware?

The name "304 stainless steel" comes from the United States.

Japan's official name for 304 stainless steel is "SUS304".

There are three commonly used marking methods on the market, among which 06Cr19Ni10 is a national standard production, S30408 is an ASTM standard production, and SUS304 is a Japanese standard production.

304 stainless steel is a common material in stainless steel with a density of 7.93 g/cm3, also known as 18/8 stainless steel. With high temperature resistance of 800 degrees, it has the characteristics of good processing performance and high toughness. It is widely used in industrial and furniture decoration industry and food medical industry.

As a widely used steel, it has good corrosion resistance, heat resistance, low temperature strength and mechanical properties; good hot workability such as stamping and bending, and no heat treatment hardening (use temperature -196 ° C ~ 800 ° C). Corrosion resistant in the atmosphere, if it is an industrial atmosphere or heavily polluted areas, it needs to be cleaned in time to avoid corrosion. Suitable for processing, storage and transportation of food. Has good processing properties and solder ability. Plate heat exchangers, bellows, household products (1, 2 tableware, cabinets, indoor pipelines, water heaters, boilers, bathtubs), auto parts (windshield wipers, mufflers, molded products), medical equipment, building materials, chemicals, food industry , agriculture, ship parts, etc. 304 stainless steel is a nationally recognized food grade stainless steel.


Q & A: Reasons for rust and toxic rumors


Q: Why does stainless steel rust?

A: Stainless steel is not a steel that will not rust, it is a steel that is not easy to rust. Stainless steel can also cause corrosion under some conditions: crevice corrosion, intergranular corrosion, stress corrosion, iron ion corrosion, chloride ion corrosion, etc. Standard processing and specification use are the key to preventing corrosion of stainless steel.


Q: Is stainless steel really poisonous?

A: People often say that stainless steel is poisonous and refers to [high manganese steel".

In this regard, Professor Li Guangqiang, professor and doctoral tutor of the School of Materials and Metallurgy, Wuhan University of Science and Technology, and the deputy director of the State Key Laboratory of Refractory Materials and Metallurgy, the Ministry of Education, has introduced the stainless steel in the production process due to the different proportions of various elements added. And the difference of "series", "high manganese steel" compared with "304 stainless steel" is to increase the content of "manganese" and reduce the "nickel", this stainless steel compared with "304" stainless steel, corrosion resistance Slightly weak, the appearance gloss is not as bright as "304 stainless steel", but because of its strong cost advantage, it has a wide range of applications in many fields.

He said that according to the literature, [High Manganese Steel" is not recommended for use in chemical environments such as acid and alkali. It can be widely used in tableware, indoor water storage equipment and engineering [non-critical structures" in daily use environments. In the manufacture of pieces. "It is better to use '304' conditionally, but it is not to say that 'high manganese steel' can't be used. As long as it is a product produced by a regular manufacturer, you can use it with confidence."


In addition: matters needing attention in the use of stainless steel products

In addition to using stainless steel cannot be long-term storage of salt, soy sauce, vinegar and other things, but also pay attention to a few points:

1. You can't use stainless steel tableware to hold traditional Chinese medicine, and you can't use stainless steel pan to decoction Chinese medicine.

2. Stainless steel tableware should not be used to hold acidic and alkaline liquids, such as vinegar and detergent.

3. Stainless steel tableware must be washed regularly and kept dry.

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