Galvanized channel steel classification

by:ChangZeng     2021-02-23
Galvanized channel steel classification flat steel refers to a steel with a width of 12-300mm, a thickness of 3-60mm, a rectangular cross-section and a slight blunt edge. Flat steel can be a finished steel products product, or it can be used as a billet for welded pipes and thin slabs for stacked sheets. Main application: Flat steel can be used for making hoop iron, tools and mechanical parts as a finished material, and used as building structure and escalator in construction. Classification Metals can be divided into: ferrous metals, steel and non-ferrous metals according to their structure. Before introducing the classification of steel, let’s briefly introduce the basic concepts of ferrous metals, steel and non-ferrous metals. 1. Ferrous metals refer to iron and iron alloys. Such as steel, pig iron, ferroalloy, cast iron, etc. Both steel and pig iron are alloys based on iron and carbon as the main additive element, collectively referred to as iron-carbon alloys. ①Pig iron is a product made by smelting iron ore in a blast furnace, which is mainly used for steelmaking and castings. ②Smelt the cast iron in an iron melting furnace to obtain cast iron (liquid), and cast the liquid cast iron into castings. This kind of cast iron is called cast iron. ③Ferroalloy is an alloy composed of iron and silicon, manganese, chromium, titanium and other elements. Ferroalloy is one of the raw materials for steelmaking. It is used as steel deoxidizer and alloy element additive during steelmaking. 2. Put the steel-making pig iron into the steel-making furnace and smelt according to a certain process to obtain steel. products include steel ingots, continuous casting billets and direct casting into various steel castings. Generally speaking, steel generally refers to steel rolled into various steels. belongs to ferrous metal but steel is not exactly equal to ferrous metal. 3. Non-ferrous metals, also called non-ferrous metals, refer to metals and alloys other than ferrous metals, such as copper, tin, lead, zinc, aluminum, brass, bronze, aluminum alloy, and bearing alloys. In addition, chromium, nickel, manganese, molybdenum, cobalt, vanadium, tungsten, titanium, etc. are also used in industry. These metals are mainly used as alloy additions to improve the properties of metals. Among them, tungsten, titanium, molybdenum, etc. are mostly used to produce tools. Of cemented carbide. These non-ferrous metals are called industrial metals, in addition to precious metals: platinum, gold, silver, etc. and rare metals, including radioactive uranium and radium. is an iron-carbon alloy with a carbon content of 0.04%-2.3%. In order to ensure its toughness and plasticity, the carbon content generally does not exceed 1.7%. In addition to iron and carbon, the main elements of steel include silicon, manganese, sulfur, and phosphorus. There are many kinds of steel classification methods, and the main methods are as follows: 1. According to quality classification. Carbon steel: low carbon steel (C≤0.25%); medium carbon steel (C≤0.25-0.60%); high carbon (C≥0.60%). 2. Classified by forming method: · Hot rolled steel · Cold drawn steel. 3. Classified by metallographic structure and normalized state: pearlite steel; bainitic steel; martensitic steel; austenitic steel. 4. Classification according to purpose·Ordinary carbon structural steel; Low-alloy structural steel; Rebar steel. ·Spring steel·Bearing steel·Tool steel: carbon tool steel; alloy tool steel; high-speed tool steel. ·Boiler steel, pressure vessel steel, agricultural machinery steel, etc. 5. Comprehensive classification·Alloy structural steel; spring steel; free-cutting steel; bearing steel; high-quality structural steel for specific purposes. 6. Classification by smelting method·Boiling steel; semi-killed steel; killed steel; special killed steel. Features Compared with traditional steel plates 1. Special product specifications. The thickness is 8-50mm, the width is 150-625mm, the length is 5-15m, and the product specifications are relatively dense, which can meet the needs of users. It can be used instead of the middle plate and can be directly welded without cutting. 2. The surface of the product is smooth and clean. The high-pressure water descaling process is used twice in the process to ensure the surface of the steel is smooth and clean. 3. Both sides are vertical and the water chestnut is clear. The second vertical rolling in the finishing rolling ensures good verticality on both sides, clear corners and good surface quality on the sides. 4. The scale of the product is accurate, three-point difference, the same level difference is better than the steel plate standard; the product is straight and the plate shape is good. The finishing rolling adopts continuous rolling technology, automatic looper automatic control, to ensure that no steel is piled or stretched, the product size is high, the tolerance range, three-point difference, same stripe, sickle bend and other parameters are better than the medium plate, and the plate shape is straight Degree is good. Cold shearing, high precision of length setting. 5. The product material adopts the national standard, which is the same as the steel plate. The quality technical standards are organized according to YB/T4212-2010 standards (Q345B/Q235B refer to GB/T1591-94 and GB/T700-06 standards respectively). It has the following advantages than steel plates in use. 1. Flat steel is rolled with negative deviation, but Delivery is based on actual weight, and the utilization rate is 1 to 5 percentage points higher than that of steel plate. 2. Flat steel can be produced with fixed thickness, fixed width and fixed length according to user needs, which reduces cutting for users, saves processes, reduces labor and material consumption, and also reduces raw material processing loss, saving time and effort , Save materials. Products have been professionally used in steel structure manufacturing, machinery manufacturing, automobile industry, mining machinery, hoisting machinery and other industrial materials. The main product section steel is one of the four types of steel (plate, tube, profile, wire). According to the section shape, section steel is divided into simple section section steel and complex section section steel (section steel). The former refers to square steel, round steel, flat steel, angle steel, hexagonal steel, etc.; the latter refers to I-beam, channel steel, steel rail, window frame steel, curved steel, etc. Square steel-steel with square section, divided into two types: hot rolled and cold rolled; hot-rolled square steel has a side length of 5-250mm; cold-drawn square steel has a side length of 3-100mm.
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