Stainless steel flat steel can be composed of various stress-bearing components according to different structural needs, 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, lifting and transportation machinery, ships, industrial furnaces, reaction towers, container racks and warehouse shelves.
Stainless steel flat steel is used in construction projects as bridges, frames, fences, power transmission, ships, vehicles, etc. The raw material billet for the production of stainless steel flat steel is low carbon square steel billet, and the finished stainless steel flat steel is delivered in a hot-rolled, cold-rolled or hot-rolled state. During the transaction, the contract and other documents should fully fill in the side width and thickness dimensions of the stainless steel flat steel, as well as other major process matters, such as annealing, solid solution, etc.
Types and specifications
Mainly divided into two categories: equilateral and unequal. Among them, equilateral can be divided into square steel. The specifications of square steel are expressed by the dimensions of side length and side thickness. The current domestic specifications are *.
Import and export orders are generally based on the specifications required for use, and the steel grade is the corresponding carbon steel grade. That is, there is no specific composition and performance series other than the specification number.
The delivery length of stainless steel flat steel is divided into two types: fixed length and double length. The domestic fixed length selection range is based on the different specifications, and the Japanese length selection range is.
Import and Export Situation
my country's imports and exports each have a certain volume, mainly imported from Japan and Western Europe. The export destinations are mainly Hong Kong, Macao, Southeast Asia, Latin America and Arab countries. Export manufacturing enterprises are mainly steel plants (steel rolling mills) in Jiangsu, Liaoning, Hebei, Beijing, Shanghai, Tianjin and other provinces and cities.
Appearance quality requirements
The surface quality of stainless steel flat steel is stipulated in the standard. Generally, it is required that there should be no harmful defects in use, such as delamination, scarring, cracks, etc.
The allowable range of geometric shape deviation is also stipulated in the standard, which generally includes curvature, side width, side thickness, vertex angle, theoretical weight, etc., and is stipulated to have significant torsion.
Chemical composition inspection
Composition index The chemical composition of stainless steel flat steel belongs to the series of rolled steel products for general structural use. There are four main inspection indexes. The content varies depending on the brand, and the approximate range is.
Inspection methods When detecting the above chemical components, commonly used standard inspection methods include manual ГОСТ, etc.
Commonly used product specifications
(General provisions for acceptance packaging marks and quality certificates of steel sections)/(Hot-rolled dimensions, shape, weight and allowable deviations) (Shape, dimensions, weight and allowable deviations of hot-rolled steel sections) ( Quality Standards for Ordinary Structural Steel) ГОСТ (Technical Conditions for Ordinary Carbon Section Steel).
According to the above-mentioned standards, the bundles should be delivered in bundles, and the bundling passes and bundle length should comply with the regulations. Generally, they are delivered naked, and moisture-proofing is required during transportation and storage.
Mechanical performance inspection
Inspection method
① Tensile test method. Commonly used standard inspection methods include/ГОСТ, etc.
②Bending test method. Commonly used standard inspection methods include /ГОСТ, etc.
The inspection items for performance index assessment are mainly tensile test and bending test. Indicators include yield point tensile strength elongation and bending qualification.
Calculation method of stainless steel weight
Weight per meter width and thickness
Stainless steel flat steel is widely used in various building structures and engineering structures, such as beams, bridges,