Sep 20, 2023
Steel knowledge
Steel is pressure processed into ingot, billet or steel of the various shapes, sizes and properties we require.
Steel is pressure processed into ingot, billet or steel of the various shapes, sizes and properties we require.
Steel is an essential part of national construction and realize the four modernizations important materials, widely used, wide variety, according to the different cross section shape, generally divided into profiles, sheet, pipe and metal products four categories, to facilitate the organization of steel production, ordering supplies and do well the management work, is divided into heavy rail, light rail, large steel, medium shape and small section steel, cold bending steel, High-quality steel, wire, medium thickness steel plate, thin steel plate, electrical silicon steel sheet, strip steel, seamless steel pipe, welded steel pipe, metal products and other varieties.
2. Steel production methods
Most steel processing is by pressure processing, which causes plastic deformation of the steel being processed (billets, ingots, etc.). According to the different processing temperatures of steel, it can be divided into cold processing and hot processing. The main processing methods of steel are:
Rolling: A pressure machining method in which metal billets pass through a gap between a pair of rotating rollers (of various shapes). Due to the compression of the roller, the cross section of the material decreases and the length increases. This is the most common production method used to produce steel. It is mainly used for the production of profiles, plates and pipes. Divided into cold rolling and hot rolling.
Forging: Using the reciprocating impact of the forging hammer or the pressure of the press to change the blank into the shape and size we require a pressure processing method. Generally divided into free forging and die forging, they are often used to produce large materials and billets and other large cross-section materials.
Drawing: It is a processing method for drawing rolled metal billets (shaped, pipes, products, etc.). Reduced cross section and increased length are entered through die holes. Most of them are used for cold processing.
Extrusion: Metal is placed in a closed extrusion cylinder, one end of the pressure is applied, so that the metal is extruded from the specified die hole to obtain the same shape and size of the finished product processing method. Mainly used in the production of non-ferrous metal materials.
3. Announcement of theoretical weight calculation of steel
Reinforcement adjustment formula:.
Angle steel: weight per meter =0.00785*(side width + side width)* side thickness.
Round steel: Weight per meter =0.00617* Diameter * diameter (thread gauge is the same as round steel).
Flat steel: weight per meter =0.00785* Thickness * side width.
Pipe material: weight per meter =0.02466* Wall thickness * (outer diameter - wall thickness).
Plate: Weight per meter =7.85* Length * width * thickness *7.85
Seamless steel pipe: weight per meter =0.02466* (outer diameter arm thickness) * arm thickness spiral welded pipe and seamless steel pipe are the same.
The proportion of stainless steel is: 8.00. The specific gravity of aluminum is 2.8.
