AISI 304, the technical characteristics of which you can find in the article, is a type of main grade in the stainless steel family. This material is austenitic steel with a fairly low carbon content. Having familiarized yourself with state standards that are used in Russia, you will be able to understand that steel grade 08X18H10 acts as an analogue.
The described material is acid-resistant, in addition, it is able to undergo short-term exposure to temperatures up to 900 ° C. But these distinctive features are not the only ones that should be paid attention to, many of them, or rather, the main ones, will be discussed below.
Specifications
AISI 304, the technical characteristics of which must be studied before purchase, has a density ranging from 7.9 to 7.93 g / cm 3 . The tensile strength is 505 MPa, while the yield strength is 215 MPa. Vickers hardness is 129, Knoop hardness is 138. If you are a private consumer, then you should pay attention to the conformity of GOST products.
AISI 304, the technical characteristics of which should help you make the right choice, has a plasticity of 70%. This is true if the sheet thickness is 50 mm. The modulus of elasticity of the material varies from 193 to 200 GPa. The shear modulus is 86 GPa. At room temperature, the magnetic permeability is 1.008. The electrical resistance is equal to the limit 7.2e-005 ohm-cm, which is true at a temperature of 20 ° C. This parameter changes to 1.16E-04 if the temperature rises to 650 ° C.
Many consumers are also interested in specific heat, in this case it is 0.5 kJ / (g · K). You may also be interested in the melting point, it varies from 1400 to 1455 ° C. The thermal conductivity of the material is 16.2 W / (m · K).
Main application and special properties
AISI 304, the technical characteristics of which were presented above, is used in the manufacture of ventilation and smoke exhaust systems, as well as chimneys. The material proved to be excellent in the manufacture of equipment for the storage, production and transportation of wine, beer, milk and other drinks, as well as chemicals. Steel is used in the manufacture of equipment for food and chemical enterprises, as well as public catering facilities.
With the help of it, table and kitchen utensils are made, as well as pipes for various purposes. Steel also forms the basis of architectural elements. AISI 304 sheet is a material that is the main grade from the stainless steel family . Among the ingredients contains Cr, which in the composition should be at least 18%. As for Ni, its volume by weight is 10%. Such a content of the first of the mentioned ingredients causes the formation of an oxide layer on the surface, and this gives the material resistance to various chemicals. Such a ratio of the elements in the composition allows one to exhibit antiferromagnetic properties.
Composition Information
Stainless steel sheet AISI 304 partially consists, as already described above, of Cr, which in the composition can be contained in the range from 18 to 20%. As for C, its maximum content is 0.08%. Fe in the material can be contained in a volume from 66.345 to 74%, as for Mn, then its composition is at most 2%. Ni in the sheet contains from 8 to 10.5%, as for P and S, then they contain a maximum of 0.045-0.03% in the material, respectively.
Steel description
The brand described in the article found its distribution in the manufacture of welded and prefabricated metal structures, household equipment and components of pipeline valves. If we mention the shape of the sheet, then steel can be classified into hot-rolled and cold-rolled material, which is determined by the production technology. Flat metal is sold in the form of rolls and sheets. The surface of the canvas in the manufacturing process can be processed in a certain way, as a result, it is possible to obtain the following surface varieties:
On sale there is a stainless pipe, which is made by electric welding. The material does not corrode in places where mechanical damage or scratches have been formed. Tanks made of this steel can be used for transportation and storage of products of the chemical industry, food industry. In the first case, we are talking about weak chemicals.
In the form of a pipe, steel may have a rectangular, round or square cross section. By the method of production, products can be seamless or electrowelded. Surfaces in these cases can be polished, opaque or mirror. AISI 304 (GOST 08X18H10) is used for the manufacture of barrels for fur, kvass and beer, as well as for the production of equipment, cooling coils, bins, dairy equipment, cryogenic vessels, evaporators, pans.
Properties of AISI 304 Steel Pipe
A stainless pipe is made from the material described in the article, which has the same technical characteristics as described above. These products are used for laying pipelines because the communications in this case have absolute smoothness, corrosion resistance, do not enter into chemical reactions with other substances and have the ability to self-repair in case of damage.
Such pipelines do not have deformations and roughnesses, they have a coating of chromium oxide, which provides resistance to the effects of the external environment. Products have good strength, they are very weldable, have a high degree of flexibility and are resistant to temperature extremes. All basic qualities are preserved even in conditions of sharply negative temperature. Such products are characterized by a long shelf life, ease of installation and ease of installation.
Scope of a stainless pipe
The stainless pipe has found its distribution almost everywhere. It has an attractive appearance, which provides the possibility of styling in any interior. Stainless steel pipe can be used for the manufacture of fences, railings and stairs, welded and prefabricated metal structures, this can include rectangular and square pipes, as well as profile products. Such pipes are used when laying important sections of the pipeline, they can become part of the exhaust system of the car, as well as used in the manufacture of exhaust elements and chimneys.
Description of stainless steel elbows
AISI 304 bends can also be found on sale today. They can have all kinds of surfaces that were mentioned above, as an additional option, a brushed surface is used. Branches can be extended or normal. They are made according to the standard and have a radius of fillet within 1.5 diameter of the passage. The wall thickness can vary from 1 to 9 mm, while the diameter is equal to a figure from 12 to 406 mm.
Description of stainless steel wire
AISI 304 wire is made in accordance with international standards, the size range can vary from 1.5 to 10 mm. You can purchase materials of different stiffness, if we are talking about a soft variety, then in this case this parameter is 500 N / mm². If desired, you can purchase a spring stiffness wire, in which case it will be characterized by the following level of this parameter: 1400 N / mm².
Processing can be opaque or mirror opaque. Wire is used in the food, construction, chemical, and pharmaceutical industries. It can be used in the manufacture of building structures, electrodes, springs, jewelry and dishes.
Conclusion
Stainless steel has found its wide distribution, it is in demand among ordinary consumers and professionals, because it is a universal material. It has outstanding corrosion resistance and oxidation performance. It is characterized by excellent weldability and has excellent low temperature properties.