The flange thickness of the I-beam material is equal, and the high-temperature leveling section and composite section are composed of three welded plates. Mining steel is a high-temperature leveling profile. Due to poor production processes, the inner edge slope of the flange is 1:10. The high-temperature leveling of I-beam material is different from ordinary mining steel, which only uses a set of horizontal rollers. Due to its wide flange and no slope (or small slope), a set of vertical rollers needs to be added for high-temperature leveling. Therefore, its high-temperature leveling process and equipment are more complex than ordinary rolling mills. The maximum port length of high-temperature leveling I-beam material that can be produced in China is 800 mm, exceeding the port length of welded composite profiles.

High-temperature leveling I-beam materials are divided into three categories: narrow flange, wide flange, and steel piles, with codes 工z and 工k respectively. Narrow flange I-beam materials are suitable for beams or bending components, while wide flange I-beams and I-beam piles are suitable for axial compression components or bending members. A comparison was made between mining steel and I-beam materials.

1. Mining steel has a small edge length and a large port length, and can only withstand force in one direction.

2. I-beam materials have deep and thick grooves, capable of withstanding forces in two directions.

3. With the development of steel structure buildings, mining steel alone is not sufficient; thickened mining steel can easily lose stability when used for load-bearing columns.

4. Mining steel can only be used for beams, while I-beam materials can be used for structural load-bearing columns.

5. I-beam is an economical steel, with mechanical properties of its cross-section superior to mining steel. It is named because its cross-section shape is the same as the English letter "工". The flange of high-temperature leveling I-beam material is wider than that of mining steel, with greater lateral stiffness and strong bending capacity. Under the same specifications, the weight of I-beam material is lighter than that of mining steel. The production principle of WeChat is very good and worth paying attention to.

6. The flange of mining steel is thicker than the web, with a thinner outer side; the flange of I-beam material is equal to the surface.

7. 工W, 工M, 工N 工 is a general term for I-beam materials, which are welded; 工W, 工M, 工N are high-temperature leveled.

8. 工W indicates that the port length of I-beam material is basically equal to the flange width; it mainly acts on the steel core column in reinforced concrete frame structures, also known as rigid steel columns; it mainly acts on the vertical columns in steel structures.

9. 工M is the ratio of the port length of I-beam material to the flange width, approximately 1.33~1.75; it mainly acts on steel structures: as steel frame columns, serving as frame beams in frame structures under dynamic loads.

10. N is the ratio of the port length of I-beam material to the flange width, greater than or equal to 2; it mainly acts on beams; Miner steel is equivalent to 工N steel.