AISI 304: specifications. Stainless steel
AISI 304, the technical characteristics of which youcan be found in the article, it is a kind of basic grade in the family of stainless steels. This material is austenitic steel with a rather low content of carbon. Having become acquainted with the state standards that are used in Russia, you will be able to understand that the steel 08Х18Н10 is an analogue.
This material is acid-resistant, in addition, it is able to undergo short-term exposure to temperatures of up to 900 aboutC. But these distinctive features are not the only ones that you should pay attention to, many of them, to be more precise, the main ones, and 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 / cm3. The tensile strength is 505MPa, while the yield strength is 215 MPa. Vickers hardness is 129, Knoop hardness is 138. If you are a private customer, then you should pay attention to the consistency of the GOST.
AISI 304, the technical characteristics of whichshould help you make the right choice, has a ductility of 70%. This is true if the thickness of the sheet 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 aboutC. This parameter changes to 1.16E-04 if the temperature rises to 650 aboutFROM.
Many consumers are also interested in the specificheat capacity, 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 aboutC. The thermal conductivity of the material is 16.2 W / (m · K).
Main application and special properties
AISI 304, the technical characteristics of which werepresented above, is used in the manufacture of ventilation and smoke removal systems, as well as chimneys. Excellent material has proved itself in the manufacture of equipment for storage, production and transportation of wine, beer, milk and other beverages, as well as chemical reagents. Steel is used in the manufacture of equipment for food and chemical enterprises, as well as public catering establishments.
With the help of her make dining and kitchenaccessories, as well as pipes for various purposes. The steel falls also in the basis of the elements of architecture. Sheet AISI 304 is a material that is the main grade from the family of stainless steels. Among the ingredients contains Cr, which in the composition should be at least 18%. As for Ni, its volume by weight is 10%. This content of the first of these ingredients causes the formation of an oxide layer on the surface, which gives the material resistance to the effects of various chemicals. This ratio of the elements in the composition makes it possible to exhibit antiferromag- netic properties.
Information on the composition
Stainless sheet AISI 304 partially consists, asalready described above, from Cr, which in the composition can be contained in the range of 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 it is composed of at most 2%. Ni in the sheet contains from 8 to 10.5%, as for P and S, they contain in the material a maximum of 0.045-0.03%, respectively.
Description of steel
The brand described in the article found itsdistribution in the manufacture of welded and prefabricated metal structures, household equipment and components of pipeline fittings. If we mention the shape of the sheet, the steel can be classified into hot-rolled and cold-rolled materials, which is determined by the production technology. Flat metal is realized in the form of rolls and sheets. The surface of the canvas in the production process can be processed in a certain way, as a result, it is possible to obtain the following varieties of the surface:
- mirror;
- ground;
- matte.
On sale there is a stainless pipe, whichis made by electrically welded method. The material is not corroded in places where mechanical damage or scratches have been formed. Containers 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 chemical reagents.
In the form of a pipe, steel can have a rectangular,round or square section. By the way of production, the products can be seamless or electrically welded. Surfaces in these cases can be ground, matt or mirror. AISI 304 (GOST 08H18N10) is used for the production of kegs for furs, 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
From the material described in the articlea stainless pipe is manufactured, which has the same technical characteristics as described above. These products are used for laying pipelines because the communications in this case are absolutely smooth, resistant to corrosion, 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 androughness, they have a coating of chromium oxide, which provides resistance to the external environment. The products have good strength, they are perfectly suited for welding, have a high degree of flexibility and are resistant to temperature changes. All the basic qualities are preserved even in the conditions of sharply negative temperature. Such products are characterized by a long period of use, ease of installation and ease of installation.
Application of stainless steel pipe
Stainless pipe found its spreadalmost everywhere. It has an attractive appearance that provides the possibility of laying in any interior. Stainless steel pipe can be used for making fences, railings and stairs, welded and prefabricated metal structures, here you 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, and also used in the manufacture of exhaust elements and chimneys.
Description of stainless steel bends
Taps AISI 304 can also be found today in thesale. They can have all kinds of surfaces, which were mentioned above, as an additional option is used a brushed surface. Taps can be elongated or conventional. They are manufactured according to the standard and have a radius of rounding within 1.5 diameter of the aisle. The wall thickness can vary from 1 to 9 mm, while the diameter is 12 to 406 mm.
Description of stainless steel wire
AISI 304 wire is manufactured in accordance withwith international standards, the size range can vary from 1.5 to 10 mm. You can purchase material of different rigidity, if it is a soft variety, then in this case this parameter is 500 N / mm². If you wish, you can purchase a wire spring stiffness, in which case it will be characterized by the following level of this parameter: 1400 N / mm².
The treatment can be matte with a coating ormirror. Wire is used in food, construction, chemical, and pharmaceutical industries. Can be used in the manufacture of building structures, electrodes, springs, jewelry and utensils.
Conclusion
Stainless steel has found its widedistribution, it is in demand among ordinary consumers and professionals, because it is a universal material. It has outstanding resistance to corrosion, as well as oxidation. It has excellent weldability and has excellent low-temperature properties.
