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 C, it has good processing performance and high toughness. It is widely used in industrial and furniture decoration industry and food medical industry.
Among the common marking methods on the market are 06Cr19Ni10 and SUS304, of which 06Cr19Ni10 generally represents the national standard production, 304 generally represents the ASTM standard production, and SUS 304 represents the Japanese standard production.
304 is a versatile stainless steel that is widely used to make equipment and parts that require good overall performance (corrosion resistance and formability). In order to maintain the corrosion resistance inherent in stainless steel, the steel must contain more than 18% chromium and more than 8% nickel. 304 stainless steel is a grade of stainless steel produced in accordance with American ASTM standards.
For 304 stainless steel, the Ni element in its composition is very important, which directly determines the corrosion resistance of 304 stainless steel and its value.
The most important elements in 304 stainless steel are Ni, Cr, but not limited to these two elements. The specific requirements are stipulated by the product standard. Common judgments in the industry consider that as long as the Ni content is greater than 8% and the Cr content is greater than 18%, it can be considered as 304 stainless steel. This is why the industry calls this type of stainless steel 18/8 stainless steel. In fact, the relevant product standards have very clear regulations for 304, and these product standards have some differences for different shapes of stainless steel. Below are some common product standards and tests.
To determine if a material is 304 stainless steel, it must meet the requirements of each element in the product standard. As long as there is a non-conformity, it cannot be called 304 stainless steel.
1ASTM A276Standard Specification for Stainless Steel Bars and Shapes
|
304 |
C |
Mn |
P |
S |
Si |
Cr |
Ni |
|
% |
0.08 |
2.00 |
0.045 |
0.030 |
1.00 |
18.0C20.0 |
8.0-11.0 |
2ASTM A240Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure essels and for General Applications
|
304 |
C |
Mn |
P |
S |
Si |
Cr |
Ni |
N |
|
% |
0.07 |
2.00 |
0.045 |
0.030 |
0.75 |
17.5C19.5 |
8.0C10.5 |
0.10 |
3JIS G4305cold-rolled stainless steel plate, sheet and strip
|
SUS 304 |
C |
Mn |
P |
S |
Si |
Cr |
Ni |
|
% |
0.08 |
2.00 |
0.045 |
0.030 |
1.00 |
18.0C20.0 |
8.0-10.5 |
4JIS G4303 Stainless steel bars
|
SUS 304 |
C |
Mn |
P |
S |
Si |
Cr |
Ni |
|
% |
0.08 |
2.00 |
0.045 |
0.030 |
1.00 |
18.0C20.0 |
8.0-10.5 |
System Description: 304 stainless steel is the most widely used chromium-nickel stainless steel [1], as a widely used steel, with good corrosion resistance, heat resistance, low temperature strength and mechanical properties; stamping, bending and other heat Good process ability, 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.
Most of the requirements for use are to maintain the original appearance of the building for a long time. When determining the type of stainless steel to be used, the main considerations are the required aesthetic standards, the corrosive nature of the location atmosphere, and the cleaning system to be used. However, more and more applications are only seeking structural integrity or water impermeability. For example, the roof and side walls of industrial buildings. In these applications, the cost of building the owner may be more important than aesthetics, and the surface is not very clean. The use of 304 stainless steel in a dry indoor environment works reasonably well. However, in rural areas and cities to maintain their appearance outdoors, they need to be cleaned frequently. In heavily polluted industrial areas and coastal areas, the surface can be very dirty and even rusted.
However, in order to obtain an aesthetic effect in an outdoor environment, nickel-containing stainless steel is required. Therefore, 304 stainless steel is widely used in curtain walls, side walls, roofs and other architectural applications, but it is best to use 316 stainless steel in aggressive industrial or marine atmospheres. Stainless steel sliding doors have been well recognized for their superiority in the use of stainless steel in structural applications. There are several design guidelines including 304 and 316 stainless steel. Because "duplex" stainless steel 2205 has a good resistance to atmospheric corrosion and high tensile strength and elastic strength, this steel is also included in the European guidelines. Product shape In fact, stainless steel is manufactured in full-standard metal shapes and sizes, and there are many special shapes. The most commonly used products are made of sheet and strip steel, and special products are also produced from medium and heavy plates, for example, hot-rolled structural steel and extruded structural steel. There are also round, elliptical, square, rectangular and hexagonal welded or seamless steel tubes and other forms of products, including profiles, bars, wires and castings.
About us
Shanghai Yikai Metal Products Co.,Ltd is a influential company in local area, in which specialize in manufacturing stainless steel products, pure titanium, titanium alloy ,plating titanium stainless steel products, nickel and nickel alloy products, to always insist to in the principles with customer's satisfaction first level , it can be fabricated typicals such as sheet/plate, bar/rod, pipe/tube seamless /welded round /square with all metal materials if you can draw it or send or fax to us, it could be realized by our efforts. We have perfect service system that staff 24h on call , fast delivery. If you have needs on products , please let me know .
