It would seem that steel checkered plate with the advent of plastic will gradually give way to the latter in many areas of their application. But, as it turned out, steel plates have not lost their positions - they are still common for laying plate lines, they are common to construct sheds, protective structures and decorative structures. They are common in drilling, for laying cables and wires.
They are common to make components and parts in machine and machine tool building, i.e. it is still a highly sought-after material.
Classification of steel plates
There are several categories of steel plates, which differ from each other in their characteristics: in metal composition, in shape and size, in performance and properties.
According to the cross section, the plates are divided into round and profile. Profiles include rectangular and oval.
According to the presence of a protective layer, they are divided into galvanized and non-galvanized. Galvanized are much more reliable, because. The outer and inner contours are covered during the production process with a thin layer of zinc.
This chemical element does not react with water, so galvanized plates corrode slowly, which increases their service life. In addition, galvanized products withstand greater loads compared to ferrous metal plates.
The next category of classification is the division according to the method of manufacturing plates:
Welded: Such steel checkered plate come from sheet iron, which is twisted to a certain diameter, and its ends are then welded together. In the production of welded steel plates, one or more sheets can be common. This all depends on the diameter of the plate being produced.
Various technologies are common in the welding process, for example, conventional arc, furnace, gas and gas-electric. It should be noted that the last two technologies are common for the manufacture of tubular products from high-alloy steel grades.
Seamless: This is a more reliable option that can withstand the high pressure of the material flowing through the plate. It's all about the lack of a connecting seam, which is the most vulnerable and unreliable area in the plate design.
What is the production process of steel checkered plate?
The production process of seamless steel checkered plate is based on the use of steel ingots (blanks). They are preheated, and then a hole is made (through), and then rolled through special roller machines. Thus, the blank is stretched along the hole, calibrated to the required size, aligned to the length of the plate. The end result is a tube.
In the seamless category, there is one subspecies that bears the name - cast steel plates. They actually do not have a seam, because they are made using steel casting technology. Molten metal is poured into a special mold in which a central rod is installed. He will form a hole in the plate (blank). After that, such a workpiece is rolled between the rollers, thereby forming and calibrating the plate itself.
Seamless plates are not only a more reliable design; they are also an expensive product compared to seam plates. They are mainly common in places where it is necessary to ensure the safe presence of a person.
Classes steel checkered plate
- The first one is common for the construction of non-critical structures, for laying cable networks, for material platelines with little pressure inside.
- 2nd - designed for the assembly of platelines in which the material is transported under pressure.
- The 3rd is characterized by the ability to withstand both high pressure and high temperature.
- The 4th is common in the oil and gas industry for transporting oil and gas and for drilling various types of wells.
- The 5th is mainly common in mechanical engineering and in the production of various equipment.
- The 6th is also common in mechanical engineering, only it has more stringent load requirements.
Profile steel plates
This kind of steel plates in the field of gas and water supply has not received distribution. They are mainly common in construction as load-bearing supports and racks. Fences and sheds are made of them today, garages are not large buildings. Thin-walled profile plates are common in the advertising and furniture industries.
It should be noted that the bulk of the produced profile steel checkered plate are welded products. But there are technologies for seamless plates, both hot-rolled and cold-drawn. Of course, seamless ones win in terms of strength, but they are not widely common, because these products are expensive.
How to check quality of steel checkered plate?
The main indicator of the quality of profiles is their mass per linear meter, which depends on the density of the metal common. All this is regulated by GOSTs. For example, if the density of the metal is 7.85 g / cm³, then the mass of a linear meter of the thinnest plate will be 0.27 kg, and the thickest - 70 kg.
Strengthening the seam of welded profile plates can be carried out by induction currents. Not all manufacturers do this, although the quality of the connection is clearly improving. In this case, the additional hardening operation does not affect the cost of products.
It should be noted that GOSTs do not indicate the cleaning of welds, therefore, shaped steel plates with a cleaned seam and not cleaned can be supplied for sale.
As for galvanized profiles, there are two technologies for applying a protective layer on steel checkered plate.
- The plate is made of galvanized sheet.
- The finished plate is coated with a zinc layer after manufacturing. It is simply dipped several times into a container containing molten zinc.
The Most Popular steel checkered plate
The assortment of a profile steel plate is determined by a large range of sizes. On the smaller side, the spread of values is from 10 to 150 mm, on the large side from 15 to 180 mm. At the same time, the most popular are plates with a size of 40 mm on the smaller side, 60-100 mm on the large side.
Profiles with a larger side dimension of more than 60 mm with a small wall thickness can easily cope with sufficiently large bending loads. That is why they are most often common in construction and in engineering communications.
Round steel plates
They are fully consistent with the information described above. The only point that needs to be paid attention to is the method of production of seamless products. Two technologies are common here, in the process of which hot-formed plates and cold-rolled steel checkered plate is produced. What is the difference between the two technologies?
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