AISI 304: specifications. Stainless steel

AISI 304, the technical characteristics of which you can find in the article, 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 can 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 ° C. But these distinctive features are not the only ones that should be addressed, many of them, or more precisely, the main ones, will be discussed below.

Specifications

AISI 304, the technical characteristics of which must be studied before purchase, has a density in the range of 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 customer, you should pay attention to the conformity of the product GOST.

AISI 304, the technical characteristics of which should 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 ^o C. This parameter changes to 1.16E-04 if the temperature rises to 650 ^o C.

Many consumers are also interested in the 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 ^o 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 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 it, they make table and kitchen utensils, as well as pipes for different 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 mass 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.

Composition information

The stainless steel sheet AISI 304 partially consists, as already described above, of 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, then the material contains a maximum of 0.045-0.03%, respectively.

Description of steel

The brand described in the article found its distribution 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, as determined by the production technology. Flat metal is realized in the form of rolls and sheets. The surface of the fabric 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, which is manufactured by electric welding 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, circular or square cross 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 this article, a stainless steel 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 and roughnesses, they have a coating of chromium oxide, which provides resistance to the external environment. The products have good strength, they are perfectly suited to 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

The stainless pipe found its distribution almost 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. These 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 on sale. They can have all kinds of surfaces, which were mentioned above, as an additional option 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 from 12 to 406 mm.

Description of stainless steel wire

The wire AISI 304 is manufactured in accordance with 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, 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 or a mirror. Wire is used in the 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 wide distribution, it is in demand with ordinary consumers and professionals, because it is a universal material. It has outstanding indicators of corrosion resistance, as well as oxidation. It has excellent weldability and has excellent low-temperature properties.