Stainless steel 304 is a material that is commonly used in many fields. To meet diverse needs, 304 stainless steel is produced with many different surfaces. In the article below, Hoa Giang Stainless Steel will help you distinguish some popular types of 304 stainless steel surfaces on the market today.
Nội dung chính
What is 304 stainless steel?
Stainless steel 304, also known as SUS304, is a type of stainless steel. The components that make up 304 stainless steel include 18% Chromium, 1% Manganese, more than 8% Nickel, and the rest is Iron (Fe). Chromium and Nickel are added to create the unique characteristics of this stainless steel.
Specifically, Chromium is used to increase the durability and corrosion resistance of materials. Nickel helps increase hardness while still maintaining the flexibility of the material..
Popular types of 304 stainless steel
Stainless steel 304 is divided into two main types: Stainless steel 304L and stainless steel 304H. The chemical composition of both types is similar, differing only in carbon content.
Inox 304L:
- Chemical composition: Stainless steel 304L (the letter “L” stands for “Low” in English, meaning low) contains a lower amount of carbon than stainless steel 304H, specifically 0.03%.
- Characteristic:304L stainless steel has high oxidation and corrosion resistance, as well as good heat resistance. Therefore, 304L stainless steel is often used in important welds to ensure the durability and stability of these welds. This material also helps reduce the reaction between Chromium and Carbon, forming Chromium carbide compounds to increase corrosion resistance in natural environmental conditions.
- Application: 304L stainless steel is often used in important welds in construction and other manufacturing industries.
Inox 304H:
- Chemical composition: Stainless steel 304H contains a higher amount of carbon than stainless steel 304L, about 0.08%.
- Properties: Due to its high carbon content, 304H Stainless Steel has remarkable toughness and high durability, as well as good abrasion resistance against natural factors such as humidity, water, air, etc.
- Application: Stainless steel 304H, thanks to its toughness, is often used in applications requiring high durability and during construction and shaping.
Outstanding characteristics of 304 stainless steel
Anti-corrosion properties
Corrosion resistance is an outstanding advantage of 304 stainless steel. Although 304 stainless steel is in frequent contact with cleaning agents, 304 stainless steel still retains its durability. In addition, 304 stainless steel also has good rust resistance, which makes cleaning easy and saves time and maintenance costs.
Due to this outstanding advantage, 304 stainless steel is commonly used in the production of food, drinks and in machinery serving the medical and pharmaceutical industries. In addition, it is also used as supplies in restaurants, hotels and many other industries.
Not only is it resistant to corrosion, 304 stainless steel also does not react with acids, alkalis and substances found in food, milk, additives, etc. This ensures health safety for users.
Good heat resistance
Stainless steel 304 has good heat resistance in the temperature range from 870 – 925 degrees Celsius. This ensures safety when using materials made from stainless steel 304 without worrying about fire or explosion. Therefore, 304 stainless steel is gradually becoming a popular choice for equipment that requires heat resistance.
Easy to shape and process
Thanks to its toughness and high weldability, processing 304 stainless steel becomes easy and convenient. Besides, 304 stainless steel also has the ability to be laminated without using additional heating tools. This feature of 304 stainless steel is often applied in the production of convenient stainless steel parts to help bring high efficiency.
Paint adhesion ability
By roughening the 304 stainless steel surface and using electrostatic painting technique, we can completely paint the 304 stainless steel surface easily according to the color you desire.
Popular types of 304 stainless steel surfaces today
Surface No.1
- Concept: This type of surface is processed through a bleaching stage after the metallurgical process, so the surface is matte black and rough like orange.
- Processing method: The surface is cleaned with chemicals and then annealed through the hot rolling stage.
- Application: Stainless steel with such a surface is often used for cold rolling or in industrial tanks, as well as making tools in the chemical industry.
Surface No.2D
- Concept: This surface is smooth and bright, but does not have a high gloss, is dark gray in color and is not finished smoothly.
- Processing method: No.2D surface is created by annealing and chemical treatment after the cold rolling stage of steel.
- Application: Products with No.2D surface are often used in petrochemical plant equipment, automobile parts, construction materials and stainless steel pipes.
Surface No.2B
- Concept: This surface has a matte finish, is polished evenly on both sides, creating a smoother surface than the No.2D surface and does not create clear reflections of objects.
- Processing method: No.2B surface is processed based on No.2D surface, to bring more gloss and smoothness than No.2D surface.
- Application: Products with No.2B surface are widely used in many cases, including as storage tanks for solar water heaters, water tanks and other applications. This surface is considered standard and has the ability to enhance the properties of the product.
Surface No.3
- Concept: This surface is mechanically treated with a rough scratch machine, so there are scratches.
- Processing method: No.3 surface is polished with a polishing pad with a density of about 100 – 200 mesh.
- Application: No.3 surface is widely used in construction, interior and exterior decoration, household appliances and kitchen utensils.
Surface No.4
- Concept: This type of surface has a silvery white color and a smooth scratched surface, with small short stripes that do not follow a certain direction.
- Processing method: Surface No.4 is polished with a density of 150 – 180 mesh, providing a higher gloss than surface No.3.
- Application: With an attractive silver-white glossy surface, No.4 surface is widely used in making bathtubs, decorating the outside and inside of buildings, as well as in the food processing industry. Products.
Surface BA
- Concept: This surface is shiny, beautiful and has the ability to reflect like a mirror, you can clearly observe objects like on a mirror surface.
- Processing: This surface is achieved by applying a gloss annealing process after cold rolling, creating a shiny surface similar to a mirror.
- Application: This surface is used in household appliances, small mirrors, kitchen utensils, construction materials and many other items where a shiny surface is required.
HL surface
- Concept: This surface is treated to have a scratch-polished effect, with long scratches similar to hair, running the length of the roll or plate and evenly distributed.
- Processing method: This surface is a combination of the polishing method using felt from surface No.4 and has vertical lines.
- Applications: This surface is widely used in interior and exterior decoration, such as doors and door frames, as well as in the manufacture of elevators and appliances in the restaurant and hotel industry.
Dull Surface
- Concept: This surface is called the matte stainless steel surface, which has a dull and not smooth surface.
- Processing method: This surface is created by reducing the gloss of the No.2B surface and creating a rough effect on the surface.
- Application: This material is often used in interior and exterior decoration, such as ceilings and walls of elevators.
304 stainless steel price list
The price of 304 stainless steel sheets/coils domestically and globally always fluctuates slightly. Currently, 304 stainless steel prices are in an increasing phase. Therefore, buyers need to regularly update price information from suppliers to be able to make the most appropriate decisions and choices.
Please contact Hoa Giang Stainless Steel at hotline 028.38485518 to receive the fastest and most accurate direct 304 stainless steel quote information!
Where to buy reputable 304 stainless steel?
At Hoa Giang Stainless Steel, we specialize in supplying and processing all types of stainless steel for corporate projects, including both large and small projects. We are committed to supporting customers in finding quality 304 stainless steel that suits their budget and needs. All of Hoa Giang’s stainless steel products are tested and meet quality standards, with reasonable and affordable prices.
In this article, we have introduced to you popular types of 304 stainless steel surfaces as well as applications in daily life. Hopefully this knowledge will be valuable and useful to you.
If you are interested in purchasing or processing 304 stainless steel, please immediately contact Hoa Giang’s hotline 028.38485518. Our customer care team will quickly receive information, answer all questions and support customers quickly and dedicatedly.
