-Introduction:
Angle iron is a long strip of steel with two sides perpendicular to each other. There are equilateral angle steel and unequal angle steel. The width of both sides of the equilateral angle steel is equal. Its specifications are expressed in millimeters of side width × side width × side thickness. For example, “∟30×30×3” means an equilateral angle steel with a side width of 30 mm and a side thickness of 3 mm. It can also be expressed by model number, which is the number of centimeters of side width, such as ∟3#. 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 2#-20#. 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.
Chemical composition of Q345C Angle Steel:
Q represents the yield of this material, and 345 refers to the yield value of this material, which is around 345. And as the thickness of the material increases, its yield value decreases.
Composition: C≤0.20 Si≤0.55 Mn≤1.70 P≤0.035 S ≤0.035 V:0.02-0.15 Nb 0.015-0.060 Al≥0.015 Ti:0.02-0.20
The difference between Q345C angle steel and other section steel:
Q235-A
Carbon C: 0.14～0.22; Manganese Mn: 0.30～0.65;
Q235-B
Carbon C: 0.12～0.20; Manganese Mn: 0.30～0.70;
Applied to carburized or cyanide parts with low core strength requirements, such as tie rods, connecting rods, hooks, bolts, shafts and welding parts, etc.
-Grid standard:
GB/T2101-89 (General provisions for acceptance, packaging, marking and quality certificates of section steel); GB9787-88/GB9788-88 (size, shape, weight and allowable deviation of hot-rolled equilateral/unequal angle steel); JISG3192- 94 (shape, size, weight and tolerance of hot-rolled steel); DIN17100-80 (quality standard for ordinary structural steel); ГОСТ535-88 (technical conditions for ordinary carbon 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.
-Chemical Composition:
(1) Composition index: The chemical composition of angle steel belongs to the general structural rolled steel series, and the main verification indexes are C, Mn, P, and S. The content varies depending on the brand. The general range is C<0.22%, Mn: 0.30-0.65%, P<0.060%, S<0.060%.
(2) Inspection methods: When testing the above chemical components, commonly used standard inspection methods include GB223, JISG1211-1215, BS1837, BS Manual 19, ГОСТ22536, etc.
-Application:
Angle steel can be used to form various stress-bearing components according to different structures, and can also be used as connectors between components. It is widely used in various building structures and engineering structures, such as house beams, bridges, transmission towers, and lifting equipment. Angle steel used in transportation machinery, ships, industrial furnaces, reaction towers, container racks, cable trench brackets, power piping, busbar bracket installation, and warehouse shelves is a carbon structural steel used in construction. It is a simple cross-section steel material and is mainly used for metal components. And the frame of the factory building, etc. It requires good weldability, plastic deformation performance and certain mechanical strength during use. The raw material billet for angle steel production is low carbon square steel billet, and the finished angle steel is delivered in a hot-rolled, normalized or hot-rolled state.
