Steel plate is one of the four major steels (plate, tube, shape and wire). In developed countries, steel plate production accounts for more than 50% of total steel production. With the development of China's national economy, the output of steel plate has gradually increased.
Steel plate is a kind of flat steel with large width-thickness ratio and large surface area. Steel plates are divided into thin plates and thick plates according to their thickness.
Thin steel plate is a steel plate with a thickness of 0.2-4mm produced by hot rolling or cold rolling. The width of the thin steel plate is between 500- 1400 mm, and it is rolled from billets of different materials according to different purposes. Commonly used materials are plain carbon steel, high-quality carbon steel, alloy structural steel, carbon tool steel, stainless steel, spring steel, electrical silicon steel and so on. They are mainly used in automobile industry, aviation industry, enamel industry, electrical industry, machinery industry and other departments. In addition to direct delivery after rolling, thin steel plates should be pickled, galvanized and tinned.
Thick steel plate is the general name of steel plate with a thickness of more than 4 mm. In practical work, steel plate with a thickness of less than 20 mm is often called medium plate, steel plate with a thickness of more than 20 mm to 60 mm is called thick plate, and steel plate with a thickness of more than 60 mm needs to be rolled on a special extra-thick plate mill, so it is called extra-thick plate. The width of thick steel plates varies from 0.6 mm to 3.0 mm, and thick plates are divided into shipbuilding steel plates, bridge steel plates, boiler steel plates, high-pressure vessel steel plates, patterned steel plates, automobile steel plates, armored steel plates and composite steel plates according to their uses.
One branch of steel plate is steel strip, which is actually a very long thin plate with a relatively small width and is usually supplied in rolls, also known as strip steel. Steel strip is often produced on multi-stand continuous rolling mill, and it is cut to length, so the productivity is higher than that of single chip microcomputer.
I. Medium and heavy plate
(1) ordinary medium-thick steel plate
1, ordinary carbon steel boiling steel plate (GB3274-88)
As the name implies, plain carbon steel boiling steel plate is hot rolled from boiling steel of ordinary carbon structural steel. Boiling steel is a kind of steel with incomplete deoxidization and high oxygen content in molten steel. When molten steel is injected into the ingot mold, the carbon-oxygen reaction produces a large amount of gas, which makes the molten steel in a boiling state, hence the name.
The carbon content of boiling steel is low. Because ferrosilicon is not used for deoxidation, the silicon content in steel is often lower than 0.07%. The outer layer of boiling steel crystallizes in boiling state, so the surface layer is pure and compact, with good surface quality and good processability. Boiling steel has no large concentrated shrinkage cavity, less deoxidizer and low steel cost. Boiling steel has many impurities in the center, serious segregation, uneven mechanical properties, high gas content in steel, low toughness, cold brittleness, high aging sensitivity and poor weldability, and is not suitable for manufacturing welded structural parts and other important structural parts that bear impact and cutting load and work at low temperature.
(1) Main uses
Boiling steel plates are widely used to manufacture various stamping parts, building and engineering structures, and some less important machine structures and parts.
(2) Brand, chemical composition and mechanical properties of materials
Comply with GB700-79(88) (technical conditions of ordinary carbon structural steel) on boiling steel. See (section steel) and other chapters.
(3) Steel plate size
The thickness of hot rolled thick steel plate is 4.5-200mm.
(4) Production unit
Angang, WISCO, Masteel, Taigang, Chongqing Iron and Steel, Handan Iron and Steel, Xingang, Liugang, Angang, Yingkou Medium Plate and Tianjin Steel Works produce ordinary carbon boiling steel plates.
2. Ordinary carbon steel plate (GB3274-88)
Ordinary carbon killed steel plate is made of ordinary carbon structural steel killed billet by hot rolling. Killed steel is a completely deoxidized steel. Before ingot injection, molten steel is fully deoxidized by ferromanganese, ferrosilicon and aluminum. The molten steel is relatively calm in the ingot mould and does not produce boiling state, so it is named killed steel.
The advantage of killed steel is uniform chemical composition, so the mechanical properties of all parts are uniform, with good weldability and plasticity and strong corrosion resistance. But the surface quality is poor, there are concentrated shrinkage cavities, and the cost is also high.
(1) Main uses
Ordinary killer steel plates are mainly used to produce structural parts such as components and welded structures that require high strength at low temperature.
(2) Brand, chemical composition and mechanical properties of materials
Comply with the provisions of killed steel in GB700-79(88) Technical Conditions for Ordinary Carbon Structural Steel. See section steel and so on.
(3) Steel plate size
The thickness of the hot rolled thick plate is 4.5-200mm.
(4) Production unit
Ordinary carbon killed steel plates are produced by Angang, WISCO, Wugang, Masteel, Taigang, Chongqing Steel, Hangang, Xingang, Liugang, Anyang, Tianjin, Yingkou Medium Plate, Shanghai Steel No.1 and No.3 Plant, Shaogang and Jigang.
3. Low alloy structural steel plate (GB3274-88)
Low-alloy structural steel plate is made of low-alloy structural steel by hot rolling. Low alloy steel plates include killed steel and semi-killed steel. Its advantages are higher strength, better performance, saving a lot of steel and reducing structural weight.
(1) Main uses
Low-alloy structural steel plates are widely used in mechanical manufacturing and metal structural parts.
(2) Brand and chemical composition of materials
See the relevant section of section steel.
(3) Steel plate size
The thickness of hot rolled steel plate is 4.5-200mm.
(4) Production unit
Angang, WISCO, Wuyang Iron and Steel Company, Maanshan Iron and Steel Co., Ltd., Chongqing Iron and Steel Co., Ltd., Xingang Co., Ltd., Liugang Co., Ltd., Kungang Co., Ltd., Tiangang Co., Ltd., Shaogang Co., Ltd., Angang Co., Ltd., No.1 and No.3 Plant of Shanghai Steel Co., Ltd. and Taigang Co.
4. Hot rolled steel plate for general structure (GB25 17-8 1)
(1) Main uses
Mainly used in buildings, bridges, vehicles and other general structures.
(2) Brand and chemical composition of materials
(3) Mechanical properties
(4) Specifications and dimensions
The thickness range of steel plate (strip) is1.2-13.0mm; Width from 700-1550 mm; Length from 2000- 12000 mm.
5. Weathering Steel Plate for Welded Structures (GB4 172-84)
Weathering steel is a steel that can resist atmospheric corrosion. Weathering steel for welding structure is to add a small amount of alloying elements, such as steel, chromium, nickel, molybdenum, niobium, titanium, zirconium, vanadium, etc., to form a protective layer on the surface of metal matrix to improve the weather resistance and good welding performance of steel.
(1) Main uses
Mainly used in bridges, buildings and other structures.
(2) Brand and chemical composition of materials
(3) Mechanical properties
6. High weatherability building steel plate (GB4 17 1-84)
Weathering steel is resistant to atmospheric corrosion. A small amount of alloying elements, such as steel, phosphorus, chromium, nickel, molybdenum, niobium, titanium, zirconium and vanadium, are added to steel to form a protective layer on the surface of metal matrix to improve the weather resistance of steel.
(1) Main uses
Mainly suitable for buildings, vehicles, towers and other structural parts.
(2) Brand and chemical composition of materials
(3) Mechanical properties
7. Patterned steel plate (GB3277-82)
Patterned steel plate is a kind of steel plate with rhombic or lenticular ribs on its surface. Its specifications are expressed by its own thickness (excluding the thickness of ribs).
(1) Main uses
Diamond-shaped board has anti-skid function, and is often used as floor, workshop escalator, work frame pedal, ship deck and automobile floor.
(2) Material brand and chemical composition
Diamond slate is made of B 1, B2 and B3 grade steel of ordinary carbon structural steel, and its chemical composition conforms to GB700-79 (Technical Conditions of Ordinary Carbon Structural Steel).
(3) Specification and theoretical weight of steel plate
(4) Production unit
Angang and Anyang iron and steel company, etc.
8. Steel plate for bridge (YB 168-70)
Bridge steel plate is specially used for erecting railway or highway bridges. It is required to have high strength, toughness and bear the load and impact of locomotives and vehicles, as well as good fatigue resistance, certain low temperature toughness and atmospheric corrosion resistance. Bolted bridge steel should also have good weldability and low notch sensitivity.
(1) Main uses
Mainly used for railway bridges and highway bridges with spans between 46- 160mm.
(2) Quantity and chemical composition of materials
(3) Mechanical properties
(4) Specifications and production units
Specification: thickness from 6-50 mm, width from 1.0-2.4 mm and length from 2.0- 16 mm.
China produces steel plates for bridges in Angang, WISCO, Shanghai No.3 Iron and Steel Plant and Chongqing Iron and Steel Plant.
9. Steel plate for hull structure (GB7 12-88)
Steel plate for hull structure is called marine steel plate for short. Due to the harsh working environment of the ship, the hull is corroded by chemical corrosion, electrochemical corrosion and marine organisms and microorganisms; The hull bears large wind and wave impact and alternating load; The shape of the ship makes its processing method complicated, so the requirements for steel for hull structure are strict. First of all, good toughness is the most critical requirement. In addition, it also requires high strength, good corrosion resistance, weldability, processability and surface quality. In order to ensure the quality and sufficient toughness, the Mn/C of chemical composition is required to be above 2.5, and the carbon equivalent is also strictly required, and it is produced by a steel mill recognized by the ship inspection department.
There are two types of hull structural steel: ordinary thickness steel and high strength steel. General strength steel is divided into four grades according to quality: A, B, C and D; High strength steel is divided into two strength grades and three quality grades; AH32、DH32、EH32、AH36、DH36、EH36。
(1) Main uses
Steel plate used for manufacturing ship hull, deck, etc. Marine, coastal and inland transport vessels.
(2) Brand and chemical composition of materials
(3) Mechanical properties
(4) Specifications and production units
Specification: thickness 4.5-50mm, width1.0-2.2m, length 4.0-12.0m.
China is mainly produced by WISCO, Masteel, No.1 and No.3 Plant of Shanghai Steel, Taigang, Kungang and Tiangang.
10, steel plate for boiler (GB7 13-86)
According to the purpose, boilers are divided into two categories: industrial boilers and utility boilers. Industrial boilers are usually used for heating by industrial enterprises, belonging to small boilers, and the steel used is ordinary carbon structural steel and low-alloy structural steel. Power station boilers are large and medium-sized boilers, which have special requirements for steel quality. Generally, alloy steel with excellent comprehensive properties is needed to manufacture it.
(1) Main uses
Mainly used for manufacturing fixed boilers, hull boilers and other important accessories of boilers.
(2) Brand and chemical composition of materials
(3) Mechanical properties
(4) Specification and size of steel plate
The thickness range of steel plate is 6- 120mm.
(5) Production unit
Steel plates for boilers are produced by Angang, WISCO, Shanghai No.3 Iron and Steel Plant, Wuyang Iron and Steel Company, Liugang, Chongqing Iron and Steel Co., Ltd., Taigang and Kungang.
1 1, steel plate for containers (GB6654-86 GB6655-86)
Because of the different containers made, the steel plates used for containers bear different pressures and strengths. General atmospheric pressure is 3 1.4MPa or higher; The working temperature is often between -20℃ and 450℃, and some are lower than-20℃. According to the working conditions and processing technology of the container, it is required that the steel plate for the container must have good cold bending and welding performance; Good plasticity and toughness; Having short-term strength or long-term strength at high temperature. In order to make the container bear higher pressure and reduce the weight of the structure itself, the steel plates used for the container are all low-alloy structural steel except high-quality carbon steel. Vessel plates are divided into carbon steel and low alloy steel plates for people with pressure difference, and low alloy steel plates for multi-layer pressure vessels.
(1) Main uses
Pressure vessel steel plate is a special kind of plate, which is mainly used to manufacture vessels for petroleum, chemical industry, gas separation, storage and transportation and other similar equipment, such as various tower vessels, heat exchangers, storage tanks, tankers and so on.
(2) Anthropological composition and mechanical properties of species and materials.
1) chemical composition and mechanical properties of carbon steel and low alloy steel thick plates for pressure vessels.
Specification and production unit: steel plate thickness 6-100 mm.
Steel plates for pressure vessels are produced by Angang, WISCO, Chongqing Steel, Wugang, Taigang, Shanghai Steel No.3 Plant, Tiangang and Masteel.
2) Chemical composition and mechanical properties of low alloy steel plate for multi-layer pressure vessel.
Specification, size and production unit of steel plate: thickness 6-8mm (grade difference1mm); The width and length are 50 mm times the length, but the minimum width is 600 mm and the minimum length is 1200 mm.
The main production units are Angang, WISCO, Chongqing Iron and Steel, Taigang, etc.
3) Chemical composition and mechanical properties of low-alloy steel plates for low-temperature pressure vessels.
Specification and size of steel plate: the thickness of low alloy steel plate for low temperature pressure vessel ranges from 6 to 50 mm.
The main production units are Angang, WISCO, Chongqing Iron and Steel, Wugang, Taigang, Shanghai No.3 Steel Plant, Tiangang and Masteel.
12 steel plate for welding gas cylinders (GB6653-86)
Steel plates for welding gas cylinders are made of high-quality carbon structural steel and low-alloy structural steel. Because the welding gas is used under a certain pressure, the chemical composition content and mechanical properties are also strictly controlled. The brand of welded gas cylinder steel is distinguished by adding "HP" (the Chinese phonetic abbreviation of welded cylinder) after it.
(1) Main uses
Steel plates for welding gas cylinders are mainly used to produce low-pressure gas cylinders, such as petroleum gas cylinders.
(2) Brand and chemical composition of materials
(3) Mechanical properties
(4) Steel plate size
The thickness of steel plate for welding gas cylinders ranges from 2.5-12mm.
13, composite steel plate (enterprise standard)
In order to save the amount of stainless acid-resistant and heat-resistant steel, some containers and structural parts use composite steel plates. Composite steel plate is a bimetallic plate with ordinary carbon structural steel, high-quality carbon structural steel and low-alloy steel as the matrix (base) and stainless acid-resistant and heat-resistant steel as the surface layer (coating) on its surface.
(1) Main uses
It is mainly used for manufacturing structural parts and containers resistant to acid and alkali, atmosphere and corrosive media.
(2) Brand and chemical composition of materials
1) brand, chemical composition and mechanical properties of the parent material.
2) Brand, chemical composition and mechanical properties of coating materials.
Grades of multilayer materials: 0Cr 19Ni9, 19Ni9,00cr19ni1,0cr17ni12mo2,00cr/. 0cr18ni11ti, 0cr18ni11nb (all above are austenite), 1Cr 13, 0cr. Its chemical composition conforms to GB4237 (stainless steel hot rolled steel plate) (see the previous section).
(3) Specification, size and production unit of steel plate
Production unit: China has Chongqing Iron and Steel Works.
14, automobile steel plate (GB3273-89)
Steel plates for automobiles are mainly used to manufacture structural parts such as automobile cross beams (longitudinal beams, cross beams) and vehicle frames. Automobile crossbeams not only bear large static load, but also bear certain impact and vibration. Therefore, the steel plate is required to have certain strength and fatigue resistance, as well as good stamping performance and cold bending performance to meet the requirements of cold stamping forming. At present, low-alloy structural steel with low carbon content is widely used as material in China.
(1) Main uses
It is mainly used for manufacturing automobile beams, frames and other structural parts.
(2) Brand and chemical composition of materials
(3) Mechanical properties
(4) Steel plate size (mm)
Thickness: 2.5-12.0mm; Width: 210-1800 mm; Length: 2000- 10000mm.
Our country has Angang, Shanghai No.3 Iron and Steel Plant, Chongqing Iron and Steel Plant, Chongqing Special Steel Plant and Kunming Iron and Steel Company.
15, hot rolled three-layer steel plate for plow wall (GB 1 1252-89)
Hot-rolled three-layer steel plate for plow wall is used to make plow wall of mechanical or animal-drawn plow. Because the plow wall undertakes the tasks of cutting, breaking and turning soil, it is required to have high wear resistance, smooth surface and sufficient toughness. The plow wall is made of three layers of steel plates, consisting of a hard outer layer and a soft middle layer. The hard outer layer is made of 65 steel or 70-85 steel, and the soft middle layer is made of Q235 steel or B2 steel.
(1) Main uses
Hot-rolled three-layer steel plates are used for plow walls of motor plows and animal-drawn plows.
(2) Brand and chemical composition of materials
(3) Mechanical properties
(4) Steel plate size and production unit
Thickness of steel plate: 5, 6, 8, 9, 10(mm), width 1.4m- 1.8m, length ≤9m, production unit: Chongqing Iron and Steel Works, etc.
(2) High quality plate
1, high-quality carbon structural steel hot rolled medium-thick steel plate (GB7 1 1-88)
High-quality carbon structural steel hot-rolled medium-thick steel plate is referred to as carbon structural steel thick plate for short, that is, its material is high-quality carbon structural steel, which is made by hot rolling and also delivered in normalized, annealed or tempered state.
(1) Main uses
Mainly used for manufacturing mechanical structural parts.
(2) Brand and chemical composition of materials
(3) Mechanical properties
(4) Steel plate size and production unit
The thickness of steel plate varies from 4.5 to 60 mm, and the extra-thick plate reaches150 mm; ; The width is 0.8-3.2m；; ; The length is from 2- 12m.
China's carbon structural thick steel plates are produced by Angang, WISCO, Wuyang Iron and Steel Company, Chongqing Special Steel Plant, TISCO, Shanghai Steel Plant No.3, Fushun Steel Plant and Tianjin Steel Plant.
2. High Quality Carbon Hot Rolled Thick Steel Plate for Automobile Manufacturing (GB3275-82)
Hot rolled thick steel plate of high quality carbon structural steel used in automobile manufacturing is made of high quality carbon structural steel by hot rolling. According to the different production and processing methods and depths, it can be divided into three categories: deep drawing (S), common deep drawing (P) and cold forming (W).
(1) Main uses
It is mainly used for manufacturing automobile cold stamping parts and cold bending parts.
(2) Brand and chemical composition of materials
(3) Mechanical properties and other tests
(4) Steel plate size and production unit
Production specifications and dimensions of high-quality carbon hot-rolled steel plate for automobile manufacturing: thickness 4.5- 14mm, width and length according to GB709 standard.
All manufacturers that produce high-quality carbon structural steel hot-rolled thick steel plates can produce them.
3. Carbon tool steel thick plate (GB3278-82)
Carbon tool steel thick plate is made of carbon tool steel by hot rolling. This kind of steel plate has good cold and hot workability, high hardness, good plastic resistance, low production cost and wide application. The main disadvantage is poor thermal hardness and hardenability, and it is usually delivered in the state of annealing or high temperature tempering.
(1) Main uses
It is mainly used to manufacture tools, measuring tools and molds with low cutting speed, simple shape and low precision requirements.
(2) Brand and chemical composition of materials
(3) Mechanical properties
(4) Specification, size and production unit of steel plate
The reverse thickness of the steel is 4.5-25mm, and the width and length of the steel plate meet the requirements of GB709.
Main production units: Chongqing Special Steel Plant, Fushun Steel Plant and Chongqing Steel Plant.
4. Alloy structural steel plate (GB11251-89)
Alloy structural steel thick plate is made of alloy structural steel by hot rolling.
(1) Main uses
Widely used in mechanical structural parts such as temperature resistance and corrosion resistance.
(2) Brand and chemical composition of materials
(3) Mechanical properties
(4) Steel plate size and production unit
The thickness of the steel plate is 4.5-50 mm, and the group spacing is divided into two groups: 4.5-8 mm and 8 mm or more. The width and length of steel plate are specified in GB709.
The manufacturers are Angang, Chongqing Special Steel Plant and Shanghai No.3 Steel Plant. Usually, the goods are delivered in a normalized, annealed or tempered state.
5. aviation thick steel plate (YB540-65)
Aviation steel plate is made of alloy structural steel by hot rolling or cold rolling.
(1) Main uses
Aviation steel plate is a special steel plate suitable for aviation industry.
(2) Quantity and chemical composition of materials
(3) Mechanical properties
(4) Stamping performance and surface state (divided into three groups)
(5) Specification, size and production unit of steel plate
The thickness of the steel plate is 4.5-8 mm, the width is 0.75- 1.00 mm, and the length is 1-2.00 mm. It is produced by Chongqing Special Steel Plant and other units.
6. High-speed tool steel thick plate (GB994-88)
High speed tool steel sheets and plates is made of high-speed tool steel by hot rolling or cold rolling.
(1) Main uses
Mainly used for manufacturing tools, etc.
(2) Brand and chemical composition of materials (GB9943-88)
(3) Mechanical properties
(4) Specification, size and production unit of steel plate
Steel plate thickness: 4.5-12mm, width: 0.65- 1.00 m, length: 1.00-2.00 m. ..
Fushun Steel Works, Chongqing Special Steel Works and Great Wall Steel Works.
7, stainless steel hot rolled thick steel plate (GB4237-84)
Stainless steel hot rolled steel plate is made of stainless steel. According to the different organizational characteristics, it can be divided into five types: austenite type, austenite-ferrite type, ferrite type, martensite type and precipitation hardening type.
(1) Main uses
Stainless steel hot-rolled thick steel plate is widely used in aviation, petroleum, chemical industry, textile, food and medical equipment and other industrial sectors to manufacture components, containers and mechanical parts that require resistance.
(2) Brand and chemical composition of materials
(3) Mechanical properties
(4) Specification, size and production unit of steel plate
The steel plate is 4.5-25mm thick, 0.6-1.8m wide and1.0-6.5m long. ..
Production units: Chongqing Special Steel Plant, Fushun Steel Plant, Shanghai No.3 Steel Plant, Great Wall Steel Plant, Taigang, etc.
8. Heat-resistant steel thick plate furnace (GB4238-84)
Heat-resistant steel thick plate is made of heat-resistant steel by hot rolling. According to the different organizational characteristics, it can be divided into four types: austenite type, ferrite type, martensite type and precipitation hardening type.
(1) Main uses
It is widely used to manufacture components that work at high temperature, such as petroleum, chemical equipment, boilers, steam turbines and industrial furnaces.
(2) Brand and chemical composition of materials
(3) Mechanical properties
(4) Specification, size and production unit of steel plate
The specifications and dimensions of the steel plate meet the requirements of GB709. Common specifications and production units are listed in the section "Thick Stainless Steel Plate".
9, electromagnetic pure iron hot rolled thick steel plate (GB6984-86)
Electromagnetic pure iron hot rolling thick steel plate is made of pure iron for electrical purposes by hot rolling.
(1) Main uses
It is mainly used for manufacturing general electromagnetic elements and non-magnetic aging electromagnetic elements.
(2) Brand and chemical composition of materials
(3) Electromagnetic characteristics
(4) Steel plate size and production unit
Steel plate thickness: 4.5-20mm, width: 1.00- 1.80m, length: 4-9.0m, and can also be rolled.
It is produced by Taigang and Shanghai No.3 Iron and Steel Plant.
Second, thin steel plate
A steel plate with a thickness less than or equal to 4 mm is called a thin steel plate. According to the different materials used, steel plates can be divided into two types: ordinary steel plates and high-quality steel plates. According to the different processing methods, it can be divided into hot rolling and cold rolling.
(1) ordinary steel plate
Ordinary steel plate is the abbreviation of ordinary carbon structural steel plate. The material of ordinary plate is ordinary carbon structural steel. It is processed by hot rolling and cold rolling.
1, hot rolled ordinary steel sheet
Hot-rolled ordinary steel plates can be divided into ordinary steel plates, pickling steel plates, roof plates, oil drum plates, patterned steel plates, steel plates for shipbuilding and steel plates for automobiles according to different purposes.
1) Hot rolled ordinary steel sheet (GB9 12-89, GB708-88)
Hot-rolled common board, commonly known as blackboard, is named for its blue-black and moire surface.
(1) Main uses
It is mainly used to manufacture products that do not require high surface quality and do not need deep drawing, such as ventilation pipes, mechanical casings, switch boxes, filing cabinets, etc. It is also often used as the blank of welded pipe and cold-formed steel. Widely used in various industrial sectors.
(2) Brand and chemical composition of materials
Comply with GB700-88 Chemical Composition of Carbon Structural Steel and GB700-79 Technical Conditions of Ordinary Carbon Structural Steel.
(3) Mechanical properties
Comply with GB700-88 and GB700-79 (technical conditions of ordinary carbon structural steel).
(4) Specification, size and production unit of steel plate
The size of steel plate conforms to GB709 (attached plate type). Thickness sorting range: 0.5-0.6, 0.7-0.8, 0.9- 1.0, 12- 1.25, 1.4- 1.5,/kloc-.
Production units: Shougang, Kungang, Tianjin No.1 Rolling Mill, Shenyang Sheet Plant, Changchun Sheet Plant, Hankou Sheet Plant, Liuzhou Steel Plant, Hangzhou Steel Plant, Hengyang Steel Plant, Jiangxi Steel Plant and Nanjing Steel Plant.
2) Pickled steel plate (YB 178-65)
Pickled steel plate is made of low-carbon ordinary steel plate by annealing and pickling. After annealing and pickling, the oxide layer on the surface is removed, which makes the surface bright and white and improves the stamping performance to a certain extent. This kind of steel plate is suitable for manufacturing products that require good surface quality and need stamping but low strength.
Pickled steel plates can be divided into two types according to their surface quality: Ⅰ and Ⅱ. According to its cupping depth, it can be divided into two levels: ordinary (P) and deep drawing (S).
(1) Main uses
Mainly suitable for alarm shell, flashlight shell, instrument shell, lamp holder, automobile brake drum, etc.
(2) Steel plate size
The thickness of the steel plate is 0.25-2mm.
Note: The grade, chemical composition and mechanical properties of the steel plate are equivalent to those in the previous section (hot rolled ordinary thin steel plate).
3) Steel plate for oil drums (GB3276-89)
(1) Main uses
It is specially used for manufacturing the barrel body, lid and bottom of 200-liter oil barrel.
(2) Brand and chemical composition of materials
The material of oil drum sheet steel is 2 # and 3 # killed steel in ordinary carbon structural steel (conforming to GB700) and 08, 10 steel in high-quality carbon structural steel.
(3) Mechanical properties
(4) Steel plate size