Delmonicos Stainless steel, an alloy of iron that contains 10% chromium in its composition. This alloy is less susceptible to corrosion than other common steels.Stainless steel is a form of iron alloy that is less discolored or corroded like other common iron, steel and aluminum. Therefore, stainless steel has many advantages that are trusted by consumers.
Later, stainless steel was further improved by adding the element nickel to enhance corrosion resistance and softening for easier machining. Let us dig deeper into its characteristics, properties, as well as its pros and cons in this article.
In our article, you will learn:
- Details Of Delmonicos Stainless Steel
- Applications of Delmonicos Stainless Steel (Inox).
- Advantages and disadvantages
Details Of Delmonicos Stainless Steel
Steel is a special alloy that has been commonly used in human life for hundreds of years. In this article we learn together about whether stainless steel is stainless steel or not? and the knowledge surrounding stainless steel such as origin, classification. Stainless steel is an alloy steel commonly used in human life
As its name implies, stainless steel is sensitive to environmental agents. There are many questions surrounding stainless steel, among them the two most common questions that are searched by many people are what type of stainless steel is stainless steel? is stainless steel stainless steel?
What is stainless steel?
What is stainless steel?, stainless steel is an alloy of many different metal elements. In which, the most basic metal element is iron (symbol Fe, ranked 26th in the periodic table) with at least 10.5% chromium (symbol Cr, ranked 24th in the periodic table) and the same element. Some other elements such as Carbon, Nickel… The name “stainless steel” is actually a term in the metallurgical industry to refer to a list of metal compounds that are not or less susceptible to corrosion, less deformation and color loss. as easily as many other common steels.
So is stainless steel stainless steel?, the answer is yes. Stainless steel is stainless steel, which is another name for this steel. There are also many other common names that people often call to refer to other stainless steels such as anti-corrosion steel, stainless steel, stainless steel or SUS 301, 304, 201, 316, 316L… Note, each type of stainless steel stainless steel will have a different metal mixing ratio, the properties of the finished metal are also different.
Origin of steel?
The father of steel is Mr. Harry Brearly, a leading expert in the steel industry. In 1913, through various complex experiments, he invented an alloy with excellent anti-corrosion advantages that no other steel at that time had. His research is published, the key link that creates this special stainless steel comes from reducing the content to 0.24% and adding a corresponding amount of chromium 12.8%.
Before World War II, the famous German steel company Krupp carried out a number of other revolutionary experiments on stainless steel. The company added the metal element Nickel (symbol Ni, number 28 in the periodic table) to the mixture following the work of Harry Brearly earlier. The results are impressive, the new steel alloy is more resistant to acid corrosion, softer and more malleable for easy machining. This is the premise for the 300 and 400 stainless steel grades to be born, popular during the second world war.
After the years of the greatest war in mankind. In the early years of the century, another British steel expert, continued to carry out another study based on the previous work of Harry Brearly and Krupp. By varying the proportions of the metals involved, this specialist created a perfect stainless steel that is used to this day. That is 304 stainless steel. According to the announcement, the percentage of chromium and nickel in 304 stainless steel is 8% and 18%, respectively. A few years later, W. H Hatfield was the author of grade 321 stainless steel with the same ratio as grade 304 but adding another metal element, titanium (the ratio was not announced).
Stainless steel classification
According to Wikipedia, steel is common in four main grades: Austenitic, Ferritic, Austenitic-Ferritic (Duplex) and Martensitic.
Also popular in beer and wine production. Outdoors, companies often take advantage of the corrosion resistance of 304L stainless steel on construction projects. In fact, both types of stainless steel can be used for many of the same applications such as:
- High-end household and industrial kitchen equipment such as pans, pots, sinks, kitchens…
- Washing machine, dishwasher
- Food processing equipment
- Chemical industry, petroleum, nuclear energy High-class interior and exterior decoration
- Medical Application
However, due to high prices and most of them chasing profits, many products now appear on the market with materials made of stainless steel 201 and stainless steel 430.
So how to distinguish which products use 304 stainless steel and which products use other materials? It’s really hard to tell with the naked eye. If you test with a magnet, you can easily distinguish 430 stainless steel from the rest due to its very high magnetic absorption.
However, stainless steel 304 or 201 if the process of processing stainless steel with great pressure at normal temperature to shape (for example, stamping to make a stainless steel sink for example), a part of the material organization changes. to Martensite form, then there will appear the phenomenon of word contamination (Vietnamese professional noun called Tu Hoa).
This phenomenon does not appear in 316 stainless steel material. In some products such as medical instruments that require no magnetization on the tool, after processing, it must be heat treated at a temperature of 770 °C to demagnetize.
Corrosion resistance of steel
There are many grades of steel with different chromium and molybdenum contents to suit the environments the alloy is subjected to.
Its corrosion resistance, low maintenance costs and luster make it the ideal material for many applications where both steel strength and corrosion resistance are required. Zinc, and nickel. However, due to many different factors, these metals are not as commonly used as stainless steel in human life.
Anti-corrosion properties of 304: Stainless steel 304 has shown its excellent resistance to corrosion when exposed to many different chemicals. 304 stainless steel is rust resistant in most architectural applications, in most food processing environments and is easy to clean. In addition, 304 stainless steel also demonstrates its corrosion resistance in the textile industry and in most inorganic acids.
Type 304L stainless steel is a low-carbon stainless steel (the letter L stands for Low, in English means low). 304L is used to prevent corrosion in critical welds. Type 304H stainless steel is a type with a higher carbon content than 304L, used in places where higher durability is required. Both 304L and 304H are available in sheet and tube form, but 304H is less commonly produced.
Anti-corrosion properties of 316: Stainless steel 316 has demonstrated its excellent resistance to corrosion when exposed to many different chemicals. The outstanding thing of Inox 316 is its resistance to surface pitting and corrosion resistance to crevices in the chloride environment at normal temperature. When in a chloride environment with a higher temperature, about 50 degrees Celsius, surface pitting and corrosion will appear in the crevices. In such environments, Duplex is an excellent choice, namely Type 2205 (UNS S31803) or stainless steels with a molybdenum content higher than 6% such as UNS S31254.
Applications of Delmonicos Steel (Inox)
Because of its heat resistance and good bearing capacity. Steel is used in many industries and everyday household appliances.
The corrosion resistance of steel is good, easy cleaning and steam sterilization. Therefore, not needing a surface coating can also affect the popularity of steel in its application. For example, enter commercial factories.
Advantages and disadvantages
Despite its high corrosion resistance, in specific environments such as sea salt and highly acidic environments, the corrosion resistance of 304 stainless steel has not been met for a long time. Over time, the surface will no longer be shiny and easily tarnished.
The common feature of stainless steel is great corrosion resistance and with 304 stainless steel, this feature is optimized and has absolute wear resistance that is not affected in bad environments such as when exposed to many chemicals. Even highly corrosive chemicals have no effect on this material. With this feature, it has been widely used and is very important to the industry, especially the food processing industry and household appliances.
Stainless steel is an alloy that can be recycled without losing its inherent qualities.
The materials used to make stainless steel are reused indefinitely to produce new products. With stainless properties, shiny colors, stainless steel appliances are easy to clean and sanitize, increase the aesthetics of the product.Inox does not contain chemicals harmful to human health, long-term use does not cause rust, so it is the first choice in the production of medical instruments, bars. sterilization, and in the food processing industry.
“When compared to mild steel, 304 stainless steel tends to have a higher tensile strength”
steel is known to have a high hardness compared to ordinary steel, not a specialized hardness product. 304 stainless steel belongs to the austenitic series, so the hardness is not too high to support good machining and bending.
steel has very good formability, it can be laminated without heating. This makes Inox exclusive in the field of manufacturing stainless steel parts.
For example: sinks, pans, pots… In addition, this property also makes 304 stainless steel applied as brake wire in industry and vehicles such as cars, motorcycles, bicycles…
In addition: Grade 304 steel exhibits good weldability, this type of steel is suitable for all welding techniques (except stone wind welding). The cutting ability of steel is worse than that of Carbon steel, when processing this material on machine tools, it must require low rotational speed, large inertia, and the cutting tool must be hard and sharp. And don’t forget to use coolant.
This ability means: When the life of the material expires (the fatigue of the material appears), the force will decrease and the mechanical and physical factors will gradually decrease. We put it into the furnace to heat and treat, then The ability to recover physical and mechanical properties is quite high. At that time, 304 stainless steel was restored to its original state without having to cook the molten workpiece again.
Delmonicos is a stainless steel with mechanical properties similar to mild steel (low carbon steel), but with a higher corrosion resistance than mild steel. Belonging to this line can include steel grades SUS 430, 410, 409… This type contains about 12% – 17% chromium. This type, with 12%Cr is often used in architecture. The type containing about 17%Cr is used to make household appliances, boilers, washing machines, indoor structures …
With the information about delmonicos stainless steel that we provide above, we hope that readers have been able to grasp the basic information and knowledge about Delmonico Stainless steel and apply it in daily life as well as in work.
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