Gerund Pipe Industry

Angle steel (Hu)
Angle steel, commonly known as angle iron, is a long steel bar with two sides perpendicular to each other and forming an angle. There are equilateral angle steel and unequal angle steel. The two sides of the equilateral angle are equal in width. Its specifications are expressed in millimeters of side width and side thickness. For example, ∟ means an equilateral angle steel with a side width of millimeters and a side thickness of millimeters. It can also be expressed by model number, which is the number of centimeters of side width, such as ∟. The model number does not indicate the dimensions of different side thicknesses in the same model. Therefore, the side width and side thickness dimensions of the angle steel should be filled in completely on the contract and other documents to avoid using the model number alone. The specifications of hot-rolled equilateral angle steel are. Angle steel can be composed of various stress-bearing components according to different needs of the structure, and can also be used as a connector between components. It is widely used in various building structures and engineering structures, such as roof beams, bridges, transmission towers, lifting and transportation machinery, ships, industrial furnaces, reaction towers, container racks and warehouses.
Introduction to Angle Steel
Angle steel can be used to form various stress-bearing components according to different needs of the structure, and can also be used as a connector between components. Widely used in various building structures and engineering structures, such as house beams, bridges, transmission towers, lifting and transportation machinery, ships, industrial furnaces, reaction towers, container racks, cable trench supports, power piping, busbar supports Installation, and warehouse shelves, etc.
Angle steel is a carbon structural steel used in construction. It is a simple cross-section steel material. It is mainly used for metal components and factory building frames. It requires good weldability, plastic deformation performance and certain mechanical strength during use. The raw material billet for the production of angle steel is low carbon square steel billet, and the finished angle steel is delivered in a hot-rolled, normalized or hot-rolled state.
Types and specifications
It is mainly divided into two types: equilateral angle steel and unequal angle steel. Among them, unequal angle steel can be divided into two types: unequal sides and equal thickness and unequal sides and unequal thickness.
The specifications of angle steel are expressed by the dimensions of side length and side thickness. At present, the specifications of domestic angle steel are numbered, and the number of centimeters of the side length is used as the number. The same angle steel often has different edge thicknesses. Imported angle steel indicates the actual size and thickness of both sides and the relevant standards. Generally, those with side lengths above are large angle steels, those with side lengths between m and m are medium-sized angle steels, and those with side lengths below m are small angle steels.
The ordering of import and export angle steel is generally based on the specifications required for use, and the steel grade is the corresponding carbon structural steel grade. Also, apart from the specification number, angle steel does not have a specific composition and performance series.
:/:\r\D\D\\m\hm\ />Equal-edge angle steel vector diagram
The delivery length of angle steel is divided into two types: fixed length and double length. The fixed length of domestic angle steel The selection range has four ranges: m, m, m, m depending on the specification number. The length selection range of angle steel produced in Japan is m.
The cross-sectional height of the unequal angle steel is calculated according to the long side width of the unequal angle steel. Refers to steel with an angular cross-section and unequal lengths on both sides. It is a kind of angle steel. Its side length ranges from mmmm to mmmm. Rolled by hot rolling mill. The general specification of unequal angle steel is: ∟*∟* thickness m
Unequal angle steel is widely used in various metal structures, bridges, machinery manufacturing and shipbuilding industries, various building structures and engineering structures, such as houses Beams, bridges, transmission towers, lifting and transportation machinery, ships, industrial furnaces, reaction towers, container racks and warehouses, etc.
Import and export
my country imports and exports angle steel in certain quantities, mainly from Japan and Western Europe import. The export destinations are mainly Hong Kong and Macao, Southeast Asia, Latin America and Arab countries. Export manufacturing enterprises are mainly steel plants (steel rolling mills) in Liaoning, Hebei, Beijing, Shanghai, Tianjin and other provinces and cities.
The imported angle steel varieties are mostly large, small angle steel and special shape angle steel, while the exported varieties are mostly medium-sized angle steel such as No. 1 and No. 1 angle steel.
Appearance quality
The surface quality of angle steel is stipulated in the standard. It is generally required that there should be no defects harmful to use, such as delamination, scarring, cracks, etc.
The allowable range of angle steel geometric shape deviation is also stipulated in the standard, which generally includes curvature, side width, side thickness, vertex angle, theoretical weight, etc., and stipulates that the angle steel must not have significant torsion.
Chemical composition
Composition index: The chemical composition of angle steel belongs to the general structural rolled steel series. The main verification indexes are, M, and four. Depending on the brand, the content varies, and the approximate range is .%, ..%, .%, .%.
Inspection methods: When testing the above chemical components, commonly used standard inspection methods include B, B, B manual, ГОСТ, etc.
Specifications and Standards
(General provisions for acceptance, packaging, marking and quality certificates of section steel) B (Dimensions, shapes, weights and allowable deviations of hot-rolled equilateral/unequal angle steel) (Hot-rolled section steel Shape, size, weight and tolerances) D (Quality Standard for Ordinary Structural Steel) ГОСТ (Technical Conditions for Ordinary Carbon Section Steel).
According to the provisions of the above standards, angle steel should be delivered in bundles, and the number of bundling passes and bundle length should comply with the regulations. Angle steel is generally delivered naked, and moisture-proofing is required during transportation and storage.
Mechanical properties
Inspection methods
① Tensile test method. Commonly used standard inspection methods include, Z, Z, M, ГОСТ, B, D, etc. ② Bending test method. Commonly used standard inspection methods include, Z, Z, M, ГОСТ, D, etc.
Performance indicators: The inspection items to evaluate the performance of angle steel are mainly tensile test and bending test. Indicators include yield point, tensile strength, elongation and bending qualification.