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INOX 304 – Concepts, classification, characteristics and applications

Stainless Steel AISI304 Also denoted as SUS 304 (Steel Use Stainless 304) according to JIS Japan, this is the most commonly used stainless steel type today. Kosmos will provide full information about this material soon!

Stainless steel 304 is a commonly used stainless steel in life
Stainless steel 304 is a commonly used stainless steel in life (Source: istockphoto.com)
1

What is stainless steel 304?

Stainless Steel AISI304 is a type of stainless steel containing more than 18% chromium (Cr), more than 8% nickel (Ni), ≤2.00% Manganese (Mn), about 1% Silicon (Si), 0.045% Phosphorus (P), 0.03% Sulfur sulfur (S), carbon (C) content is about 0.03 - 1.00% depending on the type and the rest is iron (Fe).

In particular, Chromium and Nickel play an important role in creating stainless steel. Chromium makes stainless steel durable and resistant to abrasion. Nickel helps make stainless steel strong without losing its flexibility. This type of material has low thermal and electrical conductivity, low magnetic properties and is easy to shape.

Stainless steel 304 has low thermal and electrical conductivity, low magnetic properties and is easy to shape
Stainless steel 304 has low thermal and electrical conductivity, low magnetic properties and is easy to shape

The global stainless steel market is valued 6.5 billion USD by 2022, is expected to grow at a CAGR of 5.8% from 2023 to 2031 and can reach 10.8 billion USD by the end of 2031. Among them, 304 stainless steel (304 stainless steel) is the most used, followed by 316 stainless steel.

Global stainless steel market chart according to transparency market research
Global stainless steel market chart according to transparency market research (Source: transparencymarketresearch.com)

The corrosion resistance of 304 stainless steel is much higher than 201 stainless steel. To avoid buying the wrong type of brace, You can refer to how to distinguish between 304 stainless steel and 201 stainless steel braces here.

2

2 popular types of 304 stainless steel

Stainless Steel AISI304 divided into 2 common types:

  • Stainless steel 304H (high carbon content).
  • Stainless steel 304L (low carbon content).

It is the carbon content that makes the difference between these two types of stainless steel. Except for that, the two do not have much difference in chemical composition.

Stainless steel 304H

This is kind stainless steel 304 It has a high carbon content, so it is hard and heat resistant, with the letter H standing for "High". However, high carbon content also means low corrosion resistance.

Chemical composition of 304H stainless steel

Thành phần Ratio %
C 0.04 – 1.00
Cr 18.00 – 20.00
Ni 8.00 – 11.00
Mn ≤2.00
Si ≤0.75
P ≤0.045
S ≤0.03

Mechanical properties of stainless steel 304H

Mechanical properties Value
Tensile strength (MPa) 515MPa
Yield strength (MPa) 205MPa
Elongation (%) 40%
Hardness HB 201HB
HRB hardness 92HRB

Stainless steel 304H Highly applicable, used to make kitchen utensils, make cooling towers, or used in power plants,...

Stainless steel 304H has high hardness and heat resistance, but low corrosion resistance
Stainless steel 304H has high hardness and heat resistance, but low corrosion resistance (Source: istockphoto.com)

304L stainless steel

This is kind stainless steel 304 has a low carbon content with the letter L standing for “Low”. This means high corrosion resistance. However, Stainless Steel AISI304 Not as sturdy and heat resistant as 304H stainless steel.

Chemical composition of 304L stainless steel

Thành phần Ratio %
C ≤0.03
Cr 18.00 – 20.00
Ni 9.00 – 13.00
Mn ≤2.00
Si ≤1.00
P ≤0.045
S ≤0.03

Mechanical properties of 304L stainless steel

Mechanical properties Value
Tensile strength (MPa) 485MPa
Yield strength (MPa) 170MPa
Elongation (%) 40%
Hardness HB 201HB
HRB hardness 92HRB

Because of its high anti-corrosion properties 304L stainless steel Used to make corrosion-resistant machinery, equipment and components that cannot be processed after welding.

304L stainless steel has good corrosion resistance but is not hard and durable due to its low carbon content and is often used as decorative V braces.
304L stainless steel has good corrosion resistance but is not hard and durable due to its low carbon content and is often used as decorative V braces.
3

Characteristics of SUS 304

  • Anti-corrosion, anti-rust, durable despite frequent use of detergents.
  • Does not react with acids and alkalis in food and drinks, so it is widely used as a kitchen utensil.
  • High heat resistance (from 870 - 925 degrees Celsius), no need to worry about fire or explosion.
  • SUS 304 Easy to process and shape, laminated should be used to make decorative stainless steel brace.
  • Under normal conditions, SUS 304 has low magnetism.
  • In low temperature environments or when further processed, the magnetism of SUS 304 will increase.
  • Stainless Steel AISI304 Adheres to paint well. How to paint 304 stainless steel The standard is that we have to roughen the stainless steel surface first, then we will use electrostatic painting technique to color the product.
Stainless steel 304 is the leading roll splint material today
Stainless steel 304 is the leading roll splint material today

Type of decorative brace made of stainless steel 304 Very popular, to construct we need silicon glue. You can refer to this for more information how to use silicone glue to install this type of brace properly.

4

8 popular 304 stainless steel surfaces

Surface No.1

This surface is matte black and rough like orange peel. Stainless steel 304 surface No.1 Commonly used in the chemical industry or as storage tanks.

Stainless steel 304 surface No.1
Stainless steel 304 surface No.1 (Source: stanch.com)
Surface No.2D

This surface is bright but not shiny and smooth. Stainless steel 304 surface No.2D Often used as accessories for cars, oil factory equipment, stainless steel pipes as well as other construction materials,...

Stainless steel 304 surface No.2D
Stainless steel 304 surface No.2D (Source: stanch.com)
Surface No.2B

This surface is shiny, smoother, but not as reflective as a mirror even though it is polished evenly on both sides. Stainless steel 304 surface No.2B Often used as water tanks, water tanks of solar water heaters, etc.

Stainless steel 304 surface No.2B
Stainless steel 304 surface No.2B (Source: stanch.com)
Dull Surface

This surface is created by roughening the No.2B surface so it is also more opaque. Dull surface 304 stainless steel Often used for elevator ceilings and walls, home decoration, etc.

Dull surface 304 stainless steel
Dull surface 304 stainless steel (Source: londonmetalstore.co.uk)
Surface No.3

This surface has rough scratches and is polished at a density of 100 - 200 mesh. Stainless steel 304 surface No.3 Often used as interior and exterior decorations, kitchen items, etc.

Stainless steel 304 surface No.3
Stainless steel 304 surface No.3 (Source: hermessteel.en.made-in-china.com)
Surface No.4

This surface has smooth scratches with short, small scratches that are not in the same direction, and is polished more glossy than No.3. Stainless Steel AISI304 No.4 surface is often used for interior and exterior decorations, bathtubs, etc.

Stainless steel 304 surface No.4
Stainless steel 304 surface No.4 (Source: hermessteel.net)
HL surface

This surface has a scratch pattern with long and even scratches, the same gloss as surface No.4 (polished at a density of 150 - 180 mesh). HL surface 304 stainless steel is often used to make door frames, produce elevators and furniture in hotels and restaurants, etc.

Stainless steel 304 HL surface
Stainless steel 304 HL surface (Source: hermessteel.net)
Surface BA

This surface is shiny, can be seen in a mirror but is a bit matte. Stainless steel 304 BA surface Often used as household tools, construction materials, etc.

Stainless steel 304 BA surface
BA surface 304 stainless steel (Source: stanch.com)
5

Kosmos Vietnam – A supplier of quality 304 stainless steel braces

Kosmos Vietnam is a supplier of braces Stainless Steel AISI304 quality, all kinds of braces for you to choose from such as: T brace, V brace, U brace,... mirror yellow, mirror white, bronze gold, black,... create impressive and luxurious highlights, can be upgraded immediate living space.

Kosmos Vietnam is a supplier of quality 304 stainless steel braces
Kosmos Vietnam is a supplier of quality 304 stainless steel braces

This type of splint not only adorns cladding walls stone grain pvc panels, bamboo charcoal panels but also makes the plaster ceiling more eye-catching. You can refer to the samples Stainless steel plaster ceiling brace here.

Gold 304 stainless steel brace decorates plaster ceiling
Gold 304 stainless steel brace decorates plaster ceiling

Hope the above information will help you understand more stainless steel 304. If you need to become a distributor of 304 stainless steel braces, you can contact Kosmos at +0903 093 221 XNUMX.

References
  1. https://www.dienmayxanh.com/kinh-nghiem-hay/cac-loai-be-mat-inox-304-pho-bien-hien-nay-1254299
  2. https://thepchangshu.com/product/sus304h-va-sus304l/
  3. https://thepchangshu.com/product/tam-inox-304h-sus304h/
  4. https://www.transparencymarketresearch.com/stainless-steel-foil-market.html
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