Carbon steels have specific requirements.
Carbon steels have specific requirements.
It is important to note that the presence of S and P should be within the normal range: 0.05% P,S, if the manufactured material is of ordinary quality 0.025% - if the steel is of high, excellent quality, it is marked A 0.015% - especially high quality, there is a marking W It is important to pay attention to ordinary quality steels, their characteristics.
It is used in the construction industry.
They are inexpensive and reliable.
According to their purpose, there are such types: A, B, B. Steel variants Type A: the chemical composition of steel is not regulated.
If the nodes in the structure are not subject to hot processing, then this type of material is excellent for making many elements.
Steels of the second type B, on the contrary, have strict requirements for chemical composition, this distinguishes them from group A.
They are used in products undergoing a hot treatment process, which determines their final mechanical properties.
The latter type of steel is regulated by both chemical composition and mechanical features.
It is used in the production of welded structures, in the process of manufacturing the most durable parts.
Depending on the oxidation of steel, there are: Calm appearance – 0.12% Si Semi-calm - 0.7-0.12% Si Boiling – 0.07% Si Use of steel: St.
1 and 2 – suitable for creating rivets and nails.
St.
3, 4 – for shaped products and fasteners.
Articles 5, 6 – for the production of axles, lightly loaded shafts.
Examples of grades of high-quality carbon steels: Steel 0.8; 10; 15 ... The word steel written in the designation indicates that the material is related to a high-quality appearance.
In the modern period, it is not used, only the index and letter designations are used.
Low carbon steels (soft type) are used to create elements by the cold stamping process.
High-carbon steel is ideal for products with excellent resistance to negative phenomena.
Steels, which contain a large amount of P and S, are called automatic, are used in production to create products on special machines in large quantities.
Heavy-loaded machine elements are made of an alloyed type of material.
Heat-resistant structural steels are used for the production of vessels.
Thus, each steel variant is used for the manufacture of certain products.
09 Martha 2017
