Steel plate is one of the four major varieties of steel (plate, tube, type, wire), in developed countries, steel plate production accounts for more than 50% of the total production of steel, with the development of China's national economy, the production of steel plate is gradually growing.
Steel plate is a wide ratio and surface area are very large flat steel. Steel plate is divided into two major specifications according to the thickness of thin and thick plate.
Thin steel plate is produced by hot or cold rolling methods with a thickness of 0.2-4mm between the steel plate. The width of thin steel plate is between 500-1400mm. Depending on the application, thin steel plate is rolled from billets of different materials. The commonly used materials are plain carbon steel, superior carbon steel, alloy structural steel, carbon tool steel, stainless steel, spring steel and silicon steel for electrical purposes. They are mainly used in the automotive industry, aviation industry, enameling industry, electrical industry, machinery industry and other sectors. Thin steel plate in addition to direct delivery after rolling, there are after pickling, galvanized and tin-plated and other types and categories.
Thick steel plate is the thickness of 4mm or more of the steel plate of the collective name, in practice, often less than 20mm thick steel plate called plate, thickness > 20mm to 60mm steel plate called thick plate, thickness > 60mm steel plate needs to be rolled in a specialized mill for special thick plate, it is known as special thick plate. Thick steel plate width from 0.6mm-3.0mm. Thick plate according to the use of shipbuilding steel, bridge steel, boiler steel, high-pressure vessel steel, patterned steel, automotive steel, armor plate and composite steel, etc..
A branch of steel plate is steel strip, steel strip is actually a very long sheet, the width is relatively small, often supplied in coils, also known as steel strip. Steel strip is often produced in multi-stand continuous rolling mills, cut to gauge lengths is the steel strip, so productivity is higher than in a single-pass machine.
A, medium and thick plate
(a) ordinary medium and thick steel plate
1, plain carbon steel boiling steel plate (GB3274-88)
Plain carbon steel boiling steel plate, as the name implies, is made of ordinary carbon structural steel boiling steel hot-rolled steel plate. Boiling steel is a kind of deoxygenation incomplete steel, liquid steel with high oxygen content, when the steel into the ingot mold, carbon and oxygen reaction produces a large amount of gas, resulting in the liquid steel is boiling state and the name.
Boiling steel has a low carbon content, and due to the use of ferrosilicon deoxygenation, so the silicon content in the steel is often <0.07%. The outer layer of boiling steel is crystallized in the boiling state, so the surface layer is pure, dense, good surface quality, good processing performance. Boiling steel has no large concentrated shrinkage holes, with less deoxidizer, low steel costs. Boiling steel heart impurities, segregation is more serious, mechanical properties are not uniform, more gas content in the steel, low toughness, cold brittle and aging sensitivity is greater, poor welding performance, so it is not suitable for the manufacture of impact load, working at low temperatures in the welded structural and other important structural components.
(1) the main purpose
Boiling steel plate is used in large quantities in the manufacture of a variety of stamping, construction and engineering structures and some less important machine structures and parts.
(2) material grade, chemical composition and mechanical properties
In line with GB700-79 (88) (ordinary carbon structural steel technical conditions) in the boiling steel. Refer to the section of (section steel) and so on.
(3) Steel plate specifications
The thickness of hot rolled thick steel plate is 4.5-200mm.
(4) Production units
Plain carbon boiling steel plate produced by Anshan Iron and Steel, Wuhan Iron and Steel, Maanshan Iron and Steel, Taigang, Chongqing Iron and Steel, Handan Iron and Steel Works, Xinyu Iron and Steel Works, Liuzhou Iron and Steel Works, Anyang Iron and Steel Company, Yingkou Plate Works and Tianjin Iron and Steel Works, and other producers.
2, plain carbon steel sedentary steel plate (GB3274-88)
Plain carbon sedentary steel plate is made of ordinary carbon structural steel sedentary steel billet hot-rolled steel plate. Sedentary steel is deoxidized steel, liquid steel in the injection ingot before the full deoxidation with ferromanganese, ferrosilicon and aluminum, liquid steel in the ingot mold is calm, does not produce a boiling state, so it is named sedentary steel.
The advantages of sedated steel is a uniform chemical composition, so the mechanical properties of each part is uniform, welding performance and good plasticity, corrosion resistance. But the surface quality is poor, there are concentrated shrinkage holes, the cost is also higher.
(1) the main purpose
Ordinary sedum steel plate is mainly used for the production of low-temperature components to withstand impact, welded structures and other structural components requiring high strength.
(2) material grade, chemical composition and mechanical properties
In line with GB700-79 (88) (ordinary carbon structural steel technical conditions) in the provisions of the sedentary steel. Refer to the section of section steel and so on.
(3) steel plate specifications
Hot rolled thick plate thickness 4.5-200mm.
(4) production units
Plain carbon steel plate by Anshan Iron and Steel, Wuhan Iron and Steel, Wuhan Iron and Steel, Wuhan Iron and Steel, Maanshan Iron and Steel, TISCO, Chongqing Iron and Steel, Handan Iron and Steel General Factory, Xinyu Iron and Steel, Liuzhou Iron and Steel, Anyang Iron and Steel Company, Tianjin Iron and Steel, Yingkou Plate Factory, Shangguan Iron and Steel, Shaoguan Iron and Steel Factory, Shaoguan Iron and Steel Factory, Shaoguan Iron and Steel Factory, Shaoguan Iron and Steel Factory, Shaoguan Iron and Steel Factory, Three plants, Shaoguan Iron and Steel Works and Jinan Iron and Steel Works and other production.
3, low alloy structural steel plate (GB3274-88)
Low alloy structural steel plate is made of low alloy structural steel hot rolled. Low alloy steel plate are sedated steel and semi-sedated steel plate. Its advantages are higher strength, higher performance, can save a lot of steel, reduce structural weight.
(1) The main purpose
Low-alloy structural steel plate is more and more widely used in machinery manufacturing and metal structural components.
(2) The grade and chemical composition of the material
See the relevant part of the steel section.
(3) Plate size
The thickness of hot rolled steel plate is 4.5-200mm.
(4) Production units
Anshan Iron and Steel, Wuhan Iron and Steel, Wuhan Iron and Steel, Ma Steel, Chongqing Steel, Xinyu Iron and Steel, Liuzhou Iron and Steel, Kunming Iron and Steel, Tianjin Iron and Steel, Shaoguan Special Iron and Steel, Anyang Iron and Steel, Shanghai Iron and Steel, and TISCO, and so on.
4, the general structure of hot-rolled steel plate (GB2517-81)
(1) the main purpose
Mainly used in construction, bridges, vehicles and other general structure.
(2) material grade and chemical composition
(3) mechanical properties
(4) specifications
Steel plate (strip) thickness from 1.2-13.0mm; width from 700-1550mm; length from 2000-12000mm.
5, welded structural weather-resistant steel sheet (GB4172- 84)
Weathering steel that is resistant to atmospheric corrosion steel. Weathering steel for welded structures is to add a small amount of alloying elements in steel, such as steel, chromium, nickel, molybdenum, niobium, titanium, zirconium and vanadium, etc., so that it forms a protective layer on the surface of the metal substrate, in order to improve the weathering properties of the steel, as well as good welding performance.
(1) The main use
Mainly used in bridges, buildings and other structures.
(2) material grade, chemical composition
(3) mechanical properties
6, high weathering structural steel plate (GB4171-84)
Weathering steel that is resistant to atmospheric corrosion Ji. Add a small amount of alloying elements in steel, such as steel, phosphorus, chromium, nickel, molybdenum and niobium, titanium, zirconium and vanadium, etc., so that the surface of the metal matrix to form a protective layer to improve the weathering performance of steel.
(1) The main purpose
Mainly used in construction, vehicles, towers and other structural components.
(2) material grade and chemical composition
(3) mechanical properties
7, patterned steel plate (GB3277-82)
Patterned steel plate is its surface with diamond-shaped or lentil-shaped protruding edges of the steel plate. Its specifications to its own thickness (not counting the thickness of the protrusion) that.
(1) the main purpose
Patterned plate has a non-slip effect, commonly used for flooring, factory escalators, work frame treads, ship decks and automobile floors.
(2) Material grade and chemical composition
Patterned plate material with ordinary carbon structural steel B1, B2 and B3 grade steel rolled from its chemical composition in accordance with the provisions of GB700-79 (ordinary carbon structural steel technical conditions).
(3) specifications and theoretical weight of steel plate
(4) production units
Anshan Iron and Steel Company and other production.
8, bridge steel plate (YB168-70)
Bridge steel plate is dedicated to the construction of railroad or highway bridge steel plate. Requirements for high strength, toughness and withstand the load and impact of rolling stock, and to have good fatigue resistance, a certain degree of low-temperature toughness and atmospheric corrosion resistance. Tethered bridge steel should also have good welding performance and low notch sensitivity.
(1) the main purpose
Mainly used for railroad bridges and highway bridges with spans between 46-160mm structural components.
(2) material number and chemical composition
(3) mechanical properties
(4) specifications and production units
Specifications: thickness from 6-50mm width from 1.0-2.4mm length from 2.0-16mm
China's production of steel plate for bridges, such as Anshan Iron & Steel, Wuhan Iron & Steel, Shanghai Steel and Chongqing Steel.
9, hull structural steel plate (GB712-88)
Hull structural steel plate referred to as marine plate. Due to the harsh working environment of the ship, the ship shell to be subjected to seawater chemical corrosion, galvanic corrosion and sea life, microbial corrosion; hull to withstand greater wind and wave impacts and alternating loads; the shape of the ship so that the processing method is complex and so on, so the hull of the structural steel requirements are stringent. First of all, good toughness is the most critical requirements, in addition, the requirements of high strength, good corrosion resistance, welding performance, processing and molding performance and surface quality. In order to ensure the quality and ensure that there is enough toughness, the chemical composition of the Mn / C in 2.5 or more, the carbon equivalent also has strict requirements, and by the ship inspection department recognized by the steel production.
Structural steel for hulls is divided into two kinds of general thickness and high strength steel, general strength steel is divided into four grades of A, B, C and D according to the quality; high strength steel is divided into two strength levels and three quality grades; AH32, DH32, EH32, AH36, DH36, EH36.
(1) the main purpose
Used in the manufacture of hulls of ocean, coastal and inland waterway vessels, and in the manufacture of hulls of ocean, coastal and inland waterway vessels, and in the manufacture of hulls of ocean, coastal and inland waterway vessels. The steel plate is used to manufacture the hull and deck of ocean-going, coastal and inland waterway vessels.
(2) Material grade and chemical composition
(3) Mechanical properties
(4) Specifications and production units
Specifications: thickness of 4.5-50mm width of 1.0-2.2m length of 4.0-12.0m
China's main production of Wuhan Iron & Steel, Maanshan Steel, Shanggang I, III, TISCO, Kunming Iron and Steel Company and Tianjin Steel Factory. Steel Factory and so on.
10, boiler steel plate (GB713-86)
According to the use of points, the boiler is divided into industrial boilers and power station boilers with two categories. Industrial boilers are usually industrial enterprises for heating, is a small boiler, the steel used for ordinary carbon structural steel and low alloy structural steel. Power station boilers are large, medium-sized boilers, the quality of steel has special requirements, generally require excellent overall performance of alloy steel to manufacture.
(1) the main purpose
Mainly used in the production of fixed boilers, hull boilers and other important boiler accessories.
(2) material grade and chemical composition
(3) mechanical properties
(4) specifications of the steel plate size
Steel plate thickness from 6-120mm.
(5) production units
Boiler steel plate from Anshan Iron and Steel, Wuhan Iron and Steel, Shangsteel three factories, Wuhan Iron and Steel, Wuhan Iron and Steel, Wuhan Iron and Steel, Wuhan Iron and Steel, Wuhan Steel, Wuhan Iron and Steel, Wuhan Iron and Steel, Wuhan Steel, Wuhan Steel, Wuhan Steel, Wuhan Steel, Wuhan Steel, Wuhan Steel, Wuhan Steel, Wuhan Iron and Steel, Kunming Iron and Steel Company and other production.
11, container steel plate (GB6654-86 GB6655-86)
Container steel plate as a result of the manufacture of containers are subject to different pressures and strength. General atmospheric pressure of 31.4MPa or higher; working temperature is often between -20 ℃ -450 ℃, but also below - 20 ℃. According to the working conditions of the container and processing technology, the requirements of the container steel plate must have good cold bending and welding performance; good plasticity and toughness; high temperature short-term strength or long-term strength performance. In order to make the container can withstand higher pressure, reduce the structure of its own weight, container steel plate material in addition to high-quality carbon steel, most of the current use of low alloy structural steel as material. Vessel plate is divided into pressure poor with carbon steel and low alloy steel plate, multi-layer pressure vessels with low alloy steel plate.
(1) the main purpose
Pressure vessel steel plate is a special plate, mainly used in the manufacture of petroleum, chemical, gas separation and storage and transportation of containers or other similar equipment, such as a variety of tower containers, heat exchangers, tanks and tankers.
(2) types, materials, chemical composition and mechanical properties
1) pressure vessels with carbon steel and low alloy steel plate chemical composition and mechanical properties
Specification size and production units: plate thickness of 6-100mm.
Pressure vessel steel plate from Anshan Iron & Steel, Wuhan Iron & Steel, Chongqing Iron & Steel, Wuyang Iron & Steel Company, TISCO, Tianjin Steel and Maanshan Iron & Steel Co. The steel plate for pressure vessels is produced by Ansteel, WISCO, Chongqing Steel, Wuyang Iron and Steel Company, TISCO, SISCO, Tianjin Steel and Maanshan Steel.
2) multi-layer pressure vessels with low alloy steel plate chemical composition and mechanical properties
Steel plate specifications, dimensions and production units: thickness of 6-8mm (grade difference 1mm); width and length of 50mm times the size of any size, but the width of a minimum of 600mm, the length of a minimum of 1200mm.
The main production units are Anshan Iron & Steel, Wuhan Iron & Steel, Chongqing Steel, TISCO and so on.
3) low-temperature pressure vessels with low alloy steel plate chemical composition and mechanical properties
Plate specifications, dimensions: low-temperature pressure vessels, low alloy steel plate thickness from 6-50mm.
The production units are mainly Anshan Iron & Steel, Wuhan Iron & Steel, Chongqing Iron & Steel, Wuyang Iron & Steel, TISCO, on the third steel plant, Tianjin Iron & Steel, Ma Steel, etc.
12, Wuhan Iron & Steel, Chongqing Iron & Steel, Ma Steel and other production units.
12, welding cylinders with steel (GB6653-86)
Welding cylinders with steel plate material using high-quality carbon structural steel and low alloy structural steel. As the welding gas is used under certain pressure, so the chemical composition content and mechanical properties of the control is more stringent. Welding cylinder steel grade in the subsequent addition of "HP" (welding cylinder of the Chinese pinyin abbreviation) to show the difference.
(1) the main purpose
Welded cylinders with steel plate is mainly used in the production of lower pressure cylinders, such as liquefied petroleum gas cylinders.
(2) the grade and chemical composition of the material
(3) mechanical properties
(4) the size of the steel plate specifications
Welding cylinders with a thickness of steel plate from 2.5-12mm.
13, composite steel plate (corporate standard)
In order to save the amount of stainless steel and heat-resistant steel, some containers and structural components using Composite steel plate manufacturing. Composite steel plate that is ordinary carbon structural steel, high-quality carbon structural steel and low alloy steel as a substrate (base), the surface can be stainless acid-resistant, heat-resistant steel for the surface (compound) of the bimetallic plate.
(1) the main purpose
Mainly used in the manufacture of acid and alkali, the atmosphere and corrosive media, such as structural components and containers.
(2) Material grade and chemical composition
1) The grade of the base material, chemical composition and mechanical properties.
2) Complex layer of material grade, chemical composition and mechanical properties
Complex layer of material grade: 0Cr19Ni9, 1Cr19Ni9, 00Cr19Ni11, 0Cr17Ni12Mo2, 00Cr17Ni14Mo2, 1Cr18Ni9Ti, 0Cr18Ni11Ti. 0Cr18Ni11Ti, 0Cr18Ni11Ti, 0Cr18Ni11Ti, 0Cr18Ni11Ti, 0Cr18Ni11Ti, 0Cr18Ni11Ti, 0Cr18Ni11Ti, 0Cr18Ni11Nb (above austenitic type), 1Cr13, 0Cr13, 2Cr13, 3Cr13 (above martensitic type). Its chemical composition in accordance with the provisions of GB4237 (stainless steel hot-rolled steel plate) (see previous section)
(3) the specifications of the steel plate, size and production units
Production units: China has Chongqing Steel Factory and other production.
14, automotive steel plate (GB3273-89)
Automotive steel plate is mainly used in the manufacture of automotive beams (longitudinal and transverse beams), frame and other structural components. Automotive beams not only to withstand a large static load demanding, but also to withstand a certain degree of impact, vibration, etc., so the steel plate is required to have a certain degree of strength and fatigue resistance, and the requirement to have a better stamping performance and cold bending performance, in order to suit the requirements of the cold press molding process, our country is now mostly used in the low carbon content of low alloy structural steel as a material.
(1) the main purpose
Mainly used in the manufacture of automotive beams and frames and other structural components.
(2) Material grade and chemical composition
(3) Mechanical properties
(4) Steel plate specifications (mm)
Thickness: 2.5-12.0mm; width: 210-1800mm; length: 2000-10,000mm.
In China, there are Anshan Iron & Steel, Shanghai Iron & Steel Third Factory, Chongqing Steel, Chongqing Special Steel and Kunming Steel. Special Steel Plant and Kunming Iron and Steel Company and other units of production.
15, plow wall with hot-rolled three-layer steel plate (GB11252-89)
Plow wall with hot-rolled three-layer steel plate for the manufacture of machine-guided or animal-guided style plow wall. Since the plow wall is responsible for cutting, crushing and turning the soil, it is required to have high wear resistance, smooth surface and sufficient toughness. The plow wall is made of three layers of steel, consisting of a hard outer layer and a soft middle layer rolled together. The hard outer layer is made of 65 or 70-85 steel, and the soft middle layer is made of Q235 or B2 steel.
(1) Main applications
Hot rolled three-layer steel plates for plow walls are used for the manufacture of plow walls for motorized and animal-drawn plows.
(2) material grade and chemical composition
(3) mechanical properties
(4) specifications of the steel plate size and production units
Thickness of the steel plate: 5, 6, 8, 9 and 10 (mm), width of 1.4m-1.8m, the length of ≤ 9m, the production unit: Chongqing Steel Factory and other specialized production.
(B) high-quality medium and thick plate
1, high-quality carbon structural steel hot-rolled medium and thick steel plate (GB711-88)
High-quality carbon structural steel hot-rolled medium and thick steel plate referred to as carbon structural steel thick steel plate, that is, the material of high-quality carbon structural steel, hot-rolled and made of, there are also normalized, annealed or tempered state delivery.
(1) the main purpose
Mainly used in the manufacture of mechanical structural components
(2) the grade and chemical composition of the material
(3) mechanical properties
(4) specifications of the size of the steel plate and the unit of production
Thickness of the steel plate from 4.5-60mm, the extra-thick plate up to 150mm; width of 0.8-3.2m; length from 2-12m. m; length from 2-12m.
China's production of carbon structural thick steel plate Anshan Iron and Steel, Wuhan Iron and Steel, Wuyang Iron and Steel Company, Chongqing Special Steel Plant, TISCO, on the steel plant, Fushun Steel Plant and Tianjin Steel Plant and other units.
2, automotive manufacturing of high-carbon hot-rolled thick steel plate (GB3275-82)
Automotive manufacturing of high-quality carbon structural steel hot-rolled thick steel plate with high-quality carbon structural steel as a material, hot-rolled and become. According to the different methods and depths of production and processing, is divided into deep drawing (S), ordinary drawing (P) and cold forming (W) three categories.
(1) the main purpose
Mainly used in the manufacture of automotive cold-drawn parts and cold-formed parts.
(2) Material grade and chemical composition
(3) Mechanical properties and other tests
(4) Plate specifications and production units
Automotive manufacturing of high-carbon hot-rolled steel plate production specifications and dimensions: thickness of 4.5-14mm, the width and length of the GB709 standard.
The production of high-quality carbon structural steel hot-rolled steel plate manufacturers can produce.
3, carbon tool steel plate (GB3278-82)
Carbon tool steel plate is made of carbon tool steel, hot rolled, this kind of steel plate has good cold and hot working performance, high hardness and plasticity, low production cost, and wide range of uses. The main drawback is the poor thermal hardness, poor hardenability, generally annealed or high temperature tempered state delivery.
(1) The main purpose
Mainly used in the manufacture of cutting speed is low, simple shape and precision requirements are not high, such as cutting tools, gauges and molds.
(2) the grade and chemical composition of the material
(3) mechanical properties
(4) steel specifications, dimensions and production units
The steel against the thickness of 4.5-25mm, the width and length of the steel plate in accordance with the provisions of GB709.
The main production units: Chongqing Special Steel Factory, Fushun Steel Factory and Chongqing Steel Factory.
4, alloy structural steel plate (GB11251-89)
Alloy structural steel plate is made of alloy structural steel, hot rolled.
(1) the main purpose
Widely used in temperature, corrosion-resistant mechanical structure parts.
(2) material grade and chemical composition
(3) mechanical properties
(4) steel plate specifications and production units
Steel plate thickness of 4.5-50mm, group distance is divided into 4.5-8 and 8mm above two groups. Steel plate width and length of the appointment of GB709 regulations.
Manufacturers of Anshan Steel, Chongqing Special Steel Works, on the steel three plants. Generally normalized, annealed or tempered state delivery.
5, aviation steel plate (YB540-65)
Aviation steel plate is made of alloy structural steel, hot rolled or cold rolled and become.
(1) The main purpose
Aerospace steel plate is a specialized steel plate for the aviation industry.
(2) the number and chemical composition of the material
(3) mechanical properties
(4) stamping properties and surface condition (divided into three groups)
(5) specifications of the size of the steel plate and the unit of production
The thickness of the steel plate is 4.5-8mm, width 0.75-1.00mm, length 1-2.00mm, produced by Chongqing Special Steel Factory and other units. Special Steel Factory and other units produced.
6, high-speed tool steel plate (GB994-88)
High-speed tool steel plate is made of high-speed tool steel, hot-rolled or cold-rolled.
(1) The main purpose
Mainly used in the manufacture of cutting tools.
(2) Material grade and chemical composition (GB9943-88)
(3) Mechanical properties
(4) Steel plate specifications, dimensions and production units
Steel plate thickness: 4.5-12mm, width: 0.65-1.00m, length: 1.00-2.00m.
By Fushun Steel Factory, Chongqing Special Steel Factory and Great Wall Steel Factory.
7, stainless steel hot-rolled steel plate (GB4237-84)
Stainless steel hot-rolled steel plate is made of stainless steel, hot-rolled. According to its organizational characteristics can be divided into: austenitic, austenitic a ferrite type, ferrite type, martensite type and precipitation hardening type five.
(1) the main purpose
Stainless steel hot-rolled thick steel plate is widely used in aviation, petroleum, chemical, textile, food and medical equipment and other industrial sectors, the manufacture of resistant components, containers and mechanical parts.
(2) material grade and chemical composition
(3) mechanical properties
(4) specifications, dimensions and production units
The thickness of the steel plate 4.5-25mm, width 0.6-1.8m, length 1.0-6.5m.
Production units: Chongqing Special Steel Factory, Fushun Steel Factory, Shangsteel Three Plants, Great Wall Steel and TISCO.
8, heat-resistant steel thick steel furnace (GB4238-84)
Heat-resistant steel thick steel plate is made of heat-resistant steel, hot-rolled. According to its organizational characteristics can be divided into austenitic, ferritic, martensitic and precipitation hardening type four.
(1) the main purpose
Widely used in the manufacture of petroleum, chemical equipment, boilers, turbines, industrial furnaces and other components and other components working at high temperatures.
(2) material grade and chemical composition
(3) mechanical properties
(4) specifications, dimensions and production units
Steel plate specifications and dimensions in accordance with the provisions of GB709. Common specifications and production units with the "stainless steel plate" section listed.
9, electromagnetism pure iron hot rolled steel plate (GB6984-86)
Electromagnetism pure iron hot rolled steel plate is pure iron for electrical material, hot rolled and processed.
(1) the main purpose
Mainly used in the manufacture of general electromagnetic components and non-magnetic aging electromagnetic components.
(2) Material grade and chemical composition
(3) Electromagnetic properties
(4) Plate specifications and production units
Thickness of the steel plate: 4.5-20mm, width: 1.00-1.80m, length: 4-9.0m, can also be rolled.
Produced by TISCO, Shanghai Iron and Steel Works and other units.
Second, thin steel plate
Thickness less than or equal to 4mm of steel plate called thin steel plate. Thin steel plate can be divided into ordinary thin steel plate and high-quality thin steel plate according to the material used in different categories; according to the different production and processing methods can be divided into hot-rolled and cold-rolled processing of two kinds.
(a) Ordinary thin steel plate
Ordinary thin steel plate is ordinary carbon structural steel sheet of the abbreviation. Ordinary thin plate material is ordinary carbon structural steel. Hot and cold rolled and processed.
1, hot rolled ordinary sheet steel
Hot rolled ordinary sheet steel according to its use can be divided into ordinary sheet steel, pickled sheet steel, roofing plate, oil drum plate, patterned steel, shipbuilding steel and automotive steel.
1) hot-rolled ordinary sheet steel (GB912-89, GB708-88)
Hot-rolled ordinary sheet steel commonly known as black iron, because the surface of the steel plate is cloudy blue-black and named.
(1) the main purpose
Mainly used in the manufacture of surface quality requirements are not high, do not need to deep-drawn products, such as ventilation ducts, machinery covers, switch boxes, file cabinets, etc., but also commonly used as welded pipes and cold-formed steel blanks. Widely used in various industrial sectors.
(2) material grade and chemical composition
In line with the provisions of GB700-88 carbon structural steel chemical composition and GB700-79 (ordinary carbon structural steel technical conditions).
(3) Mechanical properties
Conform to the provisions of GB700-88 and GB700-79 (ordinary carbon structural steel technical conditions).
(4) steel plate specifications, dimensions and production units
Steel plate size in accordance with the provisions of GB709 (attached to the plate class after). Thickness ordering group spacing: 0.5-0.6,0.7-0.8,0.9-1.0,12-1.25,1.4-1.5,1.75-2 and 2.5-4 (mm).
Production units: Shougang, Kunming Iron and Steel Company, Tianjin Steel Rolling Mill, Shenyang Sheet Factory, Changchun Sheet Factory, Hankou Sheet Factory, Liuzhou Steel Factory, Hangzhou Iron and Steel Factory, Hengyang Rolling Mill, Jiangxi Iron and Steel Factory and Nanjing Iron and Steel Factory.
2) Acid-washed thin steel plate (YB178-65)
Acid-washed thin steel plate is made of low carbon ordinary steel plate by annealing and pickling. Because of the annealing and pickling treatment, remove the surface oxidation layer, so that the surface is bright white, stamping performance is also improved, this steel plate is suitable for the manufacture of good surface quality, need to stamping, but the strength requirements of the product is not high.
Acid-washed thin steel plate according to its surface quality can be divided into Ⅰ, Ⅱ two groups; according to the depth of its cupping can be divided into ordinary (P) and deep-drawn (S) two levels.
(1) the main purpose
Mainly used in such as bustle shells, flashlight shells, instrument housings, lamps, automobile brake drums.
(2) steel plate specifications
The thickness of the steel plate is 0.25-2mm.
Note: The material grade, chemical composition, mechanical properties of the steel plate is the same as in the previous section (hot-rolled ordinary thin steel plate).
3) Thin steel plate for oil drums (GB3276-89)
(1) the main purpose
Specialized in the manufacture of 200L (liters) and other oil drums such as the barrel body, lid and bottom.
(2) Material grade and chemical composition
The material of thin steel plate for oil drums is made of ordinary carbon structural steel # 2 and # 3 sedentary steel (in accordance with the provisions of the GB700) and high-quality carbon structural steel in the 08, 10 steel.
(3) Mechanical properties
(4) Steel plate specifications