--Steel plate, steel strip, coated steel plate, stainless steel plate and silicon steel sheet
Steel plate is one of the four major varieties of steel (plate, tube, type, wire), in developed countries, steel plate production accounted for more than 50% of the total amount of steel production, along 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 rolling or cold rolling method thickness between 0.2-4mm steel plate. The width of thin steel plate is between 500-1400mm. According to different applications, thin steel plate rolled from different materials billet. 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 electricians. They are mainly used in the automobile 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 species and classes.
Thick steel plate is the thickness of more than 4mm 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 special special thick plate rolling mill, it is called special thick plate. Thick steel plate width from 0.6mm-3.0mm. thick plate according to the use of shipbuilding steel plate, bridge steel plate, boiler steel plate, high pressure vessel steel plate, patterned steel plate, automotive steel plate, armor plate and composite steel plate.
One of the branches of steel plate is steel strip, which is actually a very long thin plate with a relatively small width, often supplied in coils, also known as strip steel. Steel strip is often produced in multi-stand continuous rolling mills, cut to gauge lengths is steel strip, so productivity is higher than when a single sheet is in place.
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 is, as the name implies, made of ordinary carbon structural steel boiling steel hot-rolled steel plate. Boiling steel is a kind of deoxidation incomplete steel, liquid steel with high oxygen content, when the steel injected into the ingot mold, the carbon and oxygen reaction produces a large amount of gas, resulting in the liquid steel is boiling state and the name.
Boiling steel with low carbon content, and due to the use of ferrosilicon deoxygenation, so the steel content of silicon is often <0.07%. Boiling steel outer layer 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 cost of steel. 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 bearing impact interception of loads, working at low temperatures in the welded structural components 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
Conforms to the provisions of GB700-79(88) (ordinary carbon structural steel technical conditions) in boiling steel. See (section steel) and other parts.
(3) Steel plate specifications and dimensions
The thickness of hot rolled thick steel plate is 4.5-200mm.
(4) Production units
Plain carbon boiling steel plate is produced by Anshan Iron and Steel, Wuhan Iron and Steel, Maanshan Iron and Steel, Taigang, Chongqing Iron and Steel, Handan Iron and Steel General Factory, Xinyu Iron and Steel, Liuzhou Iron and Steel, Anyang Iron and Steel, Yingkou Medium Plate Plant, and Tianjin Steel Plant.
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. Sedated steel is deoxidized completely steel, liquid steel in the injection ingot before the full deoxidation with ferromanganese, ferrosilicon and aluminum, liquid steel in the ingot mold is more calm, does not produce a boiling state, so it is named sedated steel.
The advantage of sedentary steel is that the chemical composition is uniform, so the mechanical properties of each part of the uniform, welding performance and good plasticity, corrosion resistance is strong. 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
Conforms to the provisions of GB700-79(88) (ordinary carbon structural steel technical conditions) in the sedum steel. Refer to the section of section steel and so on.
(3) Steel plate specifications and dimensions
Hot rolled thick plate thickness 4.5-200mm.
(4) Production units
Plain carbon sedimented steel plate by Anshan Iron and Steel, Wuhan Iron and Steel, Wuyang Iron and Steel, Maanshan Iron and Steel Company, Maanshan Iron and Steel, TISCO, Chongqing Iron and Steel Factory, Handan Iron and Steel General Factory, Xinyu Iron and Steel Factory, Liuzhou Iron and Steel Company, Anyang Iron and Steel Company, Tianjin Iron and Steel, Yingkou Medium Plate Plant, Shangguan Iron and Steel, III plant, 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 rolling. Low alloy steel plate are sedated steel and semi-sedated steel steel plate. Its advantages are higher strength, performance of the more superior, can save a lot of steel, reduce the weight of the structure, etc..
(1) the main use
Low alloy structural steel plate is more and more widely used in machinery manufacturing and metal structural parts.
(2) material grade, chemical composition
See the relevant part of the section steel class.
(3) steel plate specifications size
Hot-rolled steel plate thickness of 4.5-200mm.
(4) production units
Anshan Iron and Steel, Wuhan Iron and Steel, Wuyang Steel, Maanshan Iron and Steel Company, Maanshan Iron and Steel, Chongqing Iron and Steel, Xinyu Iron and Steel Plant, Liuzhou Iron and Steel, Kunming Iron and Steel, Tianjin Iron and Steel, Shaoguan Special Steel Plant, Anyang Iron and Steel, Shanghai Iron and Steel I, III and TISCO and so on.
4, hot rolled steel plate for general structure (GB2517-81)
(1)Main use
Mainly used in buildings, bridges, vehicles and other general structure.
(2)Material grade and chemical composition
(3)Mechanical properties
(4)Specification size
The thickness of steel plates (strips) ranges from 1.2-13.0mm; the width ranges from 700-1550mm; and the length ranges from 2000-12,000mm.
5.Weather-resistant steel plates for welded structures (GB4172- (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 matrix, in order to improve the weathering properties of the steel, as well as good weldability.
(1) Main uses
Mainly used in bridges, buildings and other structures.
(2) material grade, chemical composition
(3) mechanical properties
6, high weathering structural steel steel plate (GB4171-84)
Weathering steel that is resistant to atmospheric corrosion Je. 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) Main uses
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 or lentil-shaped protruding prongs of the steel plate. Its specifications to its own thickness (the thickness of the protrusion does not count) that.
(1) main use
Patterned plate has a non-slip effect, commonly used as flooring, plant escalators, work frame treads, ship decks and automobile flooring.
(2) Material grade and chemical composition
The material of pattern plate is rolled with B1, B2 and B3 grade of ordinary carbon structural steel, and its chemical composition is in accordance with the provisions of GB700-79 (ordinary carbon structural steel technical conditions).
(3) Specifications and theoretical weight of steel plates
(4) Production units
Produced by Anshan Iron and Steel and Anyang Iron and Steel Company, among others.
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 to withstand the load and impact of rolling stock, and to have good fatigue resistance, a certain degree of low-temperature toughness and resistance to atmospheric corrosion. Tethered welding 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 members.
(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 plates for bridges are Anshan Steel, Wuhan Iron and Steel, Shangsteel three factories and Chongqing Steel Factory and other units.
9, hull structural steel plate (GB712-88)
Ship 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, electrochemical 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 requirements of 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 production of steel mills.
Structural steel for hulls is divided into two types: general thickness and high strength steel, general strength steel is divided into four grades of A, B, C and D according to its quality; high strength steel is further divided into two strength levels and three quality grades; AH32, DH32, EH32, AH36, DH36, EH36.
(1) Main Uses
For the manufacture of hulls of ocean-going, coastal and inland waterway transportation ship's hull, deck, etc. of the steel plate.
(2) Material grade and chemical composition
(3) Mechanical properties
(4) Specifications and production units
Specifications: thickness 4.5-50mm width 1.0-2.2m length 4.0-12.0m
China's main by the Wuhan Iron & Steel, Maanshan Steel, Shangsteel I, III plant, TISCO, Kunming Iron and Steel Company and Tianjin Steel Factory and so on.
10, boiler steel plate (GB713-86)
By use, boilers are divided into two categories of industrial boilers and power station boilers. 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) Specification size of steel plate
The thickness of steel plate is from 6-120mm.
(5) Production units
Steel plate for boilers is produced by Anshan Iron and Steel, Wuhan Iron and Steel, Shanggang No. 3 Plant, Maoyang Iron and Steel Company, Liuzhou Iron and Steel Plant, Chongqing Steel Plant, TISCO, Kunming Iron and Steel Company and other production.
11, container steel plate (GB6654-86 GB6655-86)
Container steel plate due to the manufacture of containers are subject to different pressure 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 properties. 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, storage tanks and tankers.
(2) types, materials, anthropological composition and mechanical properties
1) pressure vessels with carbon steel and low alloy steel plate chemical composition and mechanical properties
Specification of dimensions and production units: plate thickness of 6-100mm.
Pressure vessels with steel plate by Anshan Iron and Steel, Wuhan Iron and Steel, Chongqing Iron and Steel, Wuyang Iron and Steel Company, Taikang, on the steel plant, Tianjin Iron and Steel and Maanshan Iron and Steel. Ltd., Tianjin Steel Works and Maanshan Iron and Steel, and so on.
2) the chemical composition and mechanical properties of low alloy steel plate for multi-layer pressure vessels
Steel plate specifications, dimensions and production units: thickness of 6-8mm (grade 1mm); width and length of 50mm times the size of any size, but the minimum width of 600mm, the minimum length 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
Steel plate specifications, size: low-temperature pressure vessels, low alloy steel plate thickness from 6-50mm.
Production units are mainly Anshan Iron & Steel, Wuhan Iron & Steel, Chongqing Iron & Steel, Wuyang Iron & Steel, Taiyang Iron & Steel, Shanghai Iron & Steel Third, Tianjin Iron & Steel, and Ma Steel, etc..
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 welding gas is used under certain pressure, so the chemical composition content and mechanical properties of the control is also more stringent. Welding cylinder steel grade in the subsequent addition of "HP" (welding bottle of the Chinese pinyin abbreviation) to show the difference.
(1) the main purpose
Welded cylinder steel plate is mainly used for the production of lower pressure cylinders, such as liquefied petroleum gas cylinders.
(2) material grade and chemical composition
(3) mechanical properties
(4) specifications of the steel plate size
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 acid-resistant 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), in its 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) The grade of the material and chemical composition
1) The grade of the base material, chemical composition and mechanical properties.
2) The grade of the compound material, chemical composition and mechanical properties
Grade of the compound material: 0Cr19Ni9, 1Cr19Ni9, 00Cr19Ni11, 0Cr17Ni12Mo2, 00Cr17Ni14Mo2, 1Cr18Ni9Ti, 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 a production of Chongqing Steel Factory and so on.
14, automotive steel plate (GB3273-89)
Automotive steel plate is mainly used in the manufacture of automotive beams (longitudinal, transverse beams), frames and other structural components. Automotive beams not only to withstand a large static load of harsh, 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 better stamping performance and cold bending performance, in order to be suitable for cold press molding processing requirements, our country is now mostly used in the low carbon content of low alloy structural steel as material.
(1) the main purpose
Mainly used in the manufacture of automobile beams and frames and other structural components.
(2) Material grade and chemical composition
(3) Mechanical properties
(4) Specification size of steel plate (mm)
Thickness: 2.5-12.0mm; width: 210-1800mm; length: 2000-10000mm.
Chinese there are Anshan Iron & Steel, Shangsteel No. 3 Factory, Chongqing Steel Factory, Chongqing Special Steel Factory 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, used in the manufacture of machine-guided or animal-guided style of plow wall. As the plow wall bears the operation of cutting, crushing and turning soil, it is required to have high abrasion resistance, smooth surface and sufficient toughness. Plow wall with three layers of steel plate from the hard outer layer and soft middle layer composite rolled. The hard outer layer is made of 65-gauge steel or 70-85-gauge steel, and the soft middle layer is made of Q235 or B2-gauge steel.
(1) the main purpose
plow wall with hot rolled three-layer steel plate, used in the manufacture of motorized and animal traction style plow wall.
(2) material grade and chemical composition
(3) mechanical properties
(4) steel plate specifications and production units
steel plate thickness: 5, 6, 8, 9 and 10 (mm), width 1.4m-1.8m, length ≤ 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)
Hot-rolled medium and thick steel plate of high-quality carbon structural steel referred to as carbon structural steel plate, that is, the material of high-quality carbon structural steel, hot rolled and made of, but 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 steel plate from 4.5-60mm, the extra-thick plate of 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, Maoyang Iron and Steel Company, Chongqing Special Steel Plant, TISCO, Shangsteel three plants, 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 made of high-quality carbon structural steel as a material, hot-rolled and become. According to the production and processing methods and depth of the different, divided into deep drawing (S), ordinary drawing (P) and cold-formed molding (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) Steel 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.
Production of high-quality carbon structural steel hot-rolled thick steel plate manufacturers can produce.
3, carbon tool steel plate (GB3278-82)
Carbon tool steel plate to carbon tool steel as a material, made of hot-rolled, this type of steel plate cold, hot working properties, hardness and plasticity, high, low production costs, and wide range of uses. The main disadvantage is the poor thermal hardness, hardenability is poor, 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 edged tools, gauges and molds.
(2) Material grade and chemical composition
(3) Mechanical properties
(4) Steel plate specifications, dimensions and production units
Steel against the thickness of 4.5-25mm, the width and length of the steel plate in line 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 to alloy structural steel as a material, hot-rolled and become.
(1) the main purpose
widely used in temperature resistance, corrosion resistance and other mechanical structure parts.
(2) Material grade and chemical composition
(3) Mechanical properties
(4) Steel plate specifications, dimensions and production units
The thickness of the steel plate is 4.5-50mm, and the group spacing is divided into two groups of 4.5-8 and 8mm or more. Steel plate width and length of the appointment of GB709 regulations.
Manufacturers are Ansteel, Chongqing Special Steel Plant, Shangsteel three plants. Generally normalized, annealed or tempered state delivery.
5, aviation with thick steel plate (YB540-65)
Aviation steel plate is made of alloy structural steel, hot or cold rolled.
(1)Main use
Aeronautical steel plate is a special steel plate for the aviation industry.
(2) The number and chemical composition of the material
(3) Mechanical properties
(4) Stamping properties and surface condition (in three groups)
(5) Specification of the size of the steel plate and the production unit
The thickness of the steel plate is 4.5-8mm, the width of 0.75-1.00mm, the length of 1-2.00mm. produced by the Chongqing Special Steel Factory and other units. Special Steel Factory and other units of production.
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
Thickness of the steel plate: 4.5-12mm, width: 0.65-1.00m, length: 1.00-2.00m.
By the Fushun Steel Factory, Chongqing Special Steel Factory and Great Wall Steel Factory, etc. production.
7, stainless steel hot-rolled thick 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 industry, textile, food and medical equipment and other industrial sectors, the manufacture of requirements for 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 is 4.5-25mm, the width of 0.6-1.8m, and the length of 1.0-6.5m.
Production units: Chongqing Special Steel Plant, Fushun Steel Plant, Shangsteel Three Factory, Great Wall Steel Factory and TISCO, etc.
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 different 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, steam turbines, industrial furnaces and other components, as well as 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" listed in the section.
9, electromagnetism pure iron hot-rolled thick steel plate (GB6984-86)
Electromagnetic pure iron hot-rolled thick steel plate is pure iron for electricians as a material, hot-rolled and processed.
(1)Main application
It is mainly used for manufacturing 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 steel plate: 4.5-20mm, width: 1.00-1.80m, length: 4-9.0m, can also be rolled.
Produced by TISCO, Shangsteel three plants and other units.
Two, 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 short. Ordinary thin plate material is ordinary carbon structural steel. Processed by hot and cold rolling.
1, hot rolled ordinary thin steel plate
Hot rolled ordinary thin steel plate can be divided into ordinary thin steel plate, pickled thin steel plate, roofing plate, oil drum plate, patterned steel plate, steel plate for shipbuilding and automotive steel plate, etc. according to its different uses.
1) hot-rolled ordinary thin steel plate (GB912-89, GB708-88)
Hot-rolled ordinary thin steel plate is commonly known as black iron, because the surface of the steel plate is cloudy blue-black and named.
(1) main purpose
Mainly used in the manufacture of surface quality requirements are not high, do not need deep punching processing of products, such as ventilation ducts, machinery enclosures, switch boxes, filing 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
Conforms to 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 dimensions in line with the provisions of GB709 (attached to the plate class after). Thickness order 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 Rolling Mill No. 1, Shenyang Sheet Factory, Changchun Sheet Factory, Hankou Sheet Factory, Liuzhou Steel Factory, Hangzhou Iron and Steel Factory, Hengyang Rolling Mill, Jiangxi Steel Factory and Nanjing Iron and Steel Factory.
2) Pickled thin steel plate (YB178-65)
The pickled 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 manufacturing requirements for better surface quality, need to be stamped but the strength requirements are not high products.
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)Main application
Mainly used in such as buzzer shells, torch shells, instrument shells, lamp ports, automobile brake drums and so on.
(2) Steel plate specifications and dimensions
The thickness of the steel plate is 0.25-2mm.
Note: The material of the steel plate is equal to the above section (hot rolled ordinary thin steel plate) in terms of grades, chemical compositions and mechanical properties.
3) oil drums with thin steel plate (GB3276-89)
(1) the main purpose
Specialized in the manufacture of 200L (liters) and other oil drums of 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 of 2# and 3# sedentary steel grades (in accordance with the provisions of GB700) and high quality carbon structural steel of 08, 10 steel.
(3) Mechanical properties
(4) Steel plate specifications size