The theoretical value of 40*4 is 1. 26 (kg/m), and the theoretical value of 50*5 is 7. 96 (kg/m)。
Theoretical formula for flat steel: kg/m w = 0. 00785 xdxb, d is border width (mm), b is border width 40 mm and 5 mm flat steel, calculated at 275 g/m2 by zinc layer weight, giving the theoretical value of 40*4 to 1. 26 (kg/m), and the theoretical value of 50*5 is 7. 96 (kg/m)。
The flat steel can be produced in a thick, wide and long manner according to the needs of the user. It is cut less for the user, saves the process, reduces the consumption of labour, materials, and also reduces the processing of raw materials, saves time, energy and materials, and has been professionally used for steel construction, mechanical manufacturing, automobile industry, mine machinery, lifting machinery and other industrial materials。
Extension:
Zinc-plating steel construction attention:
1. In order to ensure that, at the start of extraction, the core rod is successfully brought into the deformation zone by zinc-plating steel, the end of the core bar is generally down to an angle of 45°. When using a conical core bar, the deformation of the zinc-plating steel wall is carried out mainly at the top of the core bar。
2. If the wall is reduced to a certain amount, the small corner reduces the head of the wall, increases the friction, and the large corner is deformed to concentrate, which can exacerbate wear on the end of the core bar and increase the horizontal weight of the positive pressure。
3. The selection of the cone takes into account the effects of a variety of factors, usually from 8 to 9. The diameter of the long-core bar is equal to the inner length of the piping, which should be greater than the piping。
4. During the run-off process, the final run-off temperature must be strictly controlled at not less than 900°c, otherwise the run-off force will increase sharply, deformation will be difficult to control and product size instability will be significant, especially with regard to the cyclical impact。
