Kharkiv circle calibrated steel 6-350 mm st20, st45, 40X, R6M5, 20X13, 08X18H10T (Metallobaza)

Outwardly, a calibrated circle is similar to an ordinary steel bar, only more even, accurate. In fact, he is what he is - a calibrated round bar. A simple bar, even made according to state standards, allows quite significant deviations in geometry, in surface accuracy. Accordingly, it is less demanding in terms of packaging, storage, and transportation. The circle calibrated is used as preparation for details of mechanisms, for bolts, hairpins, shaft and other products. Therefore, the requirements for the accuracy of its execution are higher. It is made from the same hot-rolled bar by additional rolling or drawing. At the same time, special attention is paid to the quality of the geometry, the absence of deviations. The raw material can be both carbon and alloy steel, including stainless steel. The same requirements are imposed on the quality of raw materials as in the manufacture of conventional bars. In some cases, the surface of the circle is additionally polished, as a result, an almost mirror surface is obtained. This variety is popularly called "silver". However, in any case, standards require that products be protected against corrosion by oil. An exception is made only for a circle made of stainless steel; it is also possible to do without oil by agreement with the customer. Features of manufacturing and delivery You can buy a calibrated circle of various sizes from steel of various grades. The diameter varies from 3 to 270 mm or more. With a size of up to 5 mm (and upon agreement with the customer - up to 25 and even more), the circle can be supplied in coils. If the diameter exceeds this figure, then it is customary to manufacture rolled products in bars of measured and random lengths. The bars are supplied bundled, each bundle must be marked. In particular, the diameter of the bar, steel grade, type of manufacturing accuracy (high, increased, ordinary accuracy) are indicated. The length of the bars can be from 1.5 to 6.5 m, depending on the type of steel. If necessary, you can buy a calibrated circle, cut into pieces of the desired length. It is worth remembering that the state standard assumes the absence of burrs and bends. The calibrated circle is a kind of rolled steel and is a round bar. For the manufacture of such material, the technology of cold drawing with the use of hot-rolled raw materials is used. Outwardly, the products are very similar to steel bars, but they are distinguished by evenness and accuracy. A calibrated circle serves as a workpiece from which various parts for mechanisms, bolted joints, studs, shafts, etc. are made. That is why strict accuracy requirements are imposed on such a material. Manufacturing technology The main feature of the calibrated wheel is high geometric accuracy, as well as improved surface quality and strength. Rolled products can be produced in one of two ways: The resulting calibrated wheel can be subjected to auxiliary processing, including polishing and grinding in order to reduce the level of roughness and improve accuracy. The calibrated circle is one of the varieties of rolled metal products. It is made in the form of a rod with different diameters and lengths, and has a circle in the transverse section. To date, such a type of rolled metal product as a calibrated circle is very common. In the manufacture of hot-rolled circles, alloy steel, low-alloy, carbon and high-carbon steel can be used, which determines its main technical characteristics. The circle calibrated is generally used in mechanical engineering, in an agricultural branch, and in all adjacent branches of mechanical processing and construction. The circle calibrated is delivered in the form of rods of round section with a diameter from 5 mm to 270 mm. The current GOST 2590-2006 and TU 14-1-2118-98 regulate the main characteristics and production technology of the wheel. For the manufacture of hot-rolled circles, steel grades St3, St2, St5, structural grades St10, St20, St35, St45, St40X, low-alloyed St09G2s, St25HSND and others are used. The rods are measured, measured multiple and non-dimensional length, as well as arbitrary length as agreed individually with the customer. GOST also regulates the maximum allowable deviation of the length of the rod, which should not exceed 50 mm. This type of product is produced in three main standards: high accuracy (marking "A") - the maximum allowable deviations in size are from -0.9 mm to +0.3 mm; increased accuracy (marking "B") - the maximum allowable deviations in size are from -2 mm to +0.6 mm; ordinary accuracy (marking "B") - the maximum allowable deviations in size are from -4 mm to +0.8 mm. It is possible to buy from us the Circle calibrated in any quantities. The company also provides additional services: shipment of goods, transportation, information support.