C245 is a steel grade that belongs to the class of low-carbon structural alloys of widespread use. You can meet it at enterprises closely associated with the manufacture of metal structures of various types and purposes.
According to GOST 27772-88, in the name of the steel grade the letter "C" stands for "Building", and the following figures indicate the ultimate fluidity of steel, measured in megapascals. It is easy to guess that C245 steel is intended for the manufacture of various kinds of metal products by means of shaped and hot-rolled products. Typically, these are:
- corners;
- channels;
- beams;
- I-beams.
Steel C245: GOST
Even if the C245 alloy does not have any distinct distinctive properties, however, even such a seemingly simple one, judging by its application, steel has a ligature composition clearly defined in GOST. Nevertheless, it somewhat affects the characteristics of the resulting product. That is why you should clearly know what impurities are present in the composition in order to better understand what C245 steel is capable of. And in its composition there are such elements as:
- Carbon is the most important additive. After all, it is she who turns soft iron into steel, making it harder, but thereby increasing fragility. Therefore, in order to maintain ductility, the carbon content in C245 steel is limited and amounts to 0.22%.
- Manganese is one of the most common additives that increase the resistance of steel to environmental influences. Its content is not more than 0.65%.
- Silicon, which increases the ductility of steel and improves its internal structure, is contained in the alloy in an amount up to 0.15%.
- Chromium is a common alloying agent that increases the resistance of steel to corrosion, and also slightly increases strength. However, in C245 steel, the chromium content is limited to 0.30%, and therefore its effect on steel is not so significant.
- Nickel is an element that has a complex effect, as it increases both strength and ductility, and corrosion resistance of steel. Its percentage in the alloy is equal to the chromium content.
- Copper is an alloying additive inherent in the majority for building steels and increasing their resistance to corrosion. Steel C245 in its composition contains 0.30% copper.
In addition to the above additives, the composition contains harmful impurities of sulfur and phosphorus. However, their impact on quality is negligible.
Characteristics C245
For any structural steel without exception, the following indicators remain central:
- strength;
- weldability;
- resistance to environmental influences.
Analysis of each item
Steel C245, mainly due to its composition, does not have outstanding strength indicators. However, one must understand that such requirements have never been presented to her. Its direct purpose is to be ductile, which makes it possible to produce the necessary parts from sheet steel by cold stamping, as well as simple bending. For thicker material, it is recommended to use heat at the bend.
C245 is an excellent option for welded structures, since the weldability of the alloy is not limited and the resulting joint is not prone to the formation of defects.
Regarding corrosion resistance. Since the composition of the steel contains impurities of nickel, chromium and copper, the resistance to its effect becomes more noticeable. This allows you to store steel products for a long time without any problems, without resorting, for example, to the application of a protective varnish / paint coating. However, for long-term storage, a dry room would still be preferable.