steel plate

 The characteristics of pickling plate compared with hot rolled plate 1. The surface quality is good. Compared with ordinary hot-rolled sheets, hot-rolled pickled sheets have removed surface oxide scale, improved the surface quality of steel, and are convenient for welding, oiling and painting. 2. The dimensional accuracy is high. After leveling, the plate shape can be changed to a certain extent, thereby reducing the deviation of unevenness. 3. Improve the surface finish and enhance the appearance effect. Shengtian Industrial provides a full range of steel products and products.Steel material manufacturers in China.We can supply the steel plate ,steel coil,round steel,structural steel,flat steel. Contact me: Official website:https://p.st.company/ Mail:sale@st.company TEL: +863172099979

 Where is cold rolled sheet used? Cold rolled sheet (cold rolled sheet in English) is made of hot rolled coil as raw material, rolled at room temperature below the recrystallization temperature to form a steel plate with a thickness of less than 4mm. Since rolling at room temperature does not produce iron oxide scale, the cold-rolled sheet has good surface quality and high dimensional accuracy. Coupled with annealing treatment, its mechanical properties and process performance are superior to hot-rolled sheets. Cold-rolled sheets are mainly used in construction (building roof panels, roof grids, etc.), agriculture, animal husbandry and fishery (grain storage and transportation, frozen processing equipment for meat and aquatic products), automobile manufacturing (corrosion-resistant parts), home appliances (civilian chimneys, kitchen utensils), etc. There are many kinds of cold-rolled sheets, such as galvanized sheet, stainless steel sheet, aluminum sheet. Shengtian Industrial provides

 What is the difference between the general board and the medium board Common plate is the abbreviation of ordinary hot-rolled carbon steel plate, which generally refers to the thin plate made of Q235 series. The medium plate generally refers to the hot-rolled plate of more than 20mm to less than 50mm. Coil, as the name implies, refers to steel coils, which must be flattened before they can be used. The common thickness is between 2mm-20mm, and the common materials are Q235, Q345, etc. Coils are also divided into hot-rolled coils, cold-rolled coils, stainless steel coils, and patterned coils. etc. Generally refers to hot-rolled thin coils. The flat plate refers to the steel plate after the coil is flattened, and the coiled plate cannot be used without flattening. To put it simply, it is to spread the coiled plate and cut it into a certain length of steel plate. The two are completely different classification methods, roughly speaking: common steel refers to steel grades, that is, commo

 What is the middle plate of the steel plate, and what is the middle plate? A steel plate is a flat steel material with a large aspect ratio and surface area. According to the thickness, it is thin steel plate (thickness<=4mm) and thick steel plate (thickness>4mm). Steel plates with a thickness > 60mm are called extra-thick plates, collectively called medium-thick steel plates. A steel plate with a relatively small width and a long length is called a steel strip and is listed as an independent variety. Shengtian Industrial provides a full range of steel products and products.Steel material manufacturers in China.We can supply the steel plate ,steel coil,round steel,structural steel,flat steel. Contact me: Official website:https://p.st.company/ Mail:sale@st.company TEL: +863172099979

What is CCS?       Carbon capture and storage (CCS) describes a suite of technologies that capture waste CO2, usually from large point sources, transport it to a storage site, and deposit it where it will not enter the atmosphere. Stored CO2 is injected into an underground geological formation; this could be a depleted oil and gas reservoir or other suitable geological formation. CO2 can also be injected into mature oil fields, driving out additional oil from the rock before being permanently stored. This is known as enhanced oil recovery (EOR) and is a form of carbon capture use and storage (CCUS). Shengtian Industrial provides a full range of steel products and products.Steel material manufacturers in China.We can supply the steel plate ,steel coil,round steel,structural steel,flat steel. Contact me: Official website:https://p.st.company/ Mail:sale@st.company TEL: +863172099979

 2022 global crude steel production The World Steel Association (WSA) released the global crude steel production data for December 2022. In December 2022, the crude steel output of the 64 countries and regions included in the World Steel Association's statistics was 140.7 million tons, a year-on-year decrease of 10.8%. In 2022, global crude steel production will reach 1.8785 billion tons, a year-on-year decrease of 4.2%. In terms of regions, in December 2022, Africa's crude steel output was 1.1 million tons, a year-on-year decrease of 8.9%; Asia and Oceania's crude steel output was 104.9 million tons, a year-on-year decrease of 9.2%; the EU (27 countries) crude steel output was 920 The output of crude steel in other European countries was 3.4 million tons, a year-on-year decrease of 19.2%; the output of crude steel in the Middle East was 3.7 million tons, an increase of 0.4% year-on-year; the output of crude steel in North America was 8.8 million tons, a year-on-year decrea

 Steel Decarburization Standard On December 21, 2022, the WTO Secretariat published a new information note on decarbonization standards for the steel industry entitled "Decarbonization standards and the steel industry: how the WTO can support greater coherence", emphasizing the need to address development The importance of China's national demand for decarbonization standards. The note was released ahead of a global stakeholder event on the WTO Steel Decarbonization Standard to be held on 9 March 2023. The WTO Secretariat stated that there are currently more than 20 different steel industry decarbonization standards and initiatives around the world, which may bring uncertainty to global steel manufacturers, increase transaction costs, and bring risks of trade frictions. The note to the note points out that the WTO still needs to do further work to strengthen the consistency of global standards, including finding areas of further convergence in terms of specific measuremen

Sustainability Indicators Report  The world steel association released the 2022 edition of the Sustainability Indicators Report, which uses 8 indicators to measure the performance of the global steel industry in the 2021 fiscal year (the division of fiscal years in different countries and regions is slightly different) in terms of economy, environment and society. In terms of environmental performance, in fiscal year 2021, the carbon dioxide emission intensity of the iron and steel industry is 1.91 tons of carbon dioxide/ton of steel, the energy intensity is 21.31 GJ/ton of steel, and the raw material utilization efficiency is 97.34%. In terms of social performance, in fiscal year 2021, the lost time injury rate in the iron and steel industry is 0.81 work-related injuries/million working hours, and the employee training rate is 6.71 training days/employee. In terms of economic benefits, in fiscal year 2021, the proportion of investment in new processes and new products in the iron and

The latest ranking of the world's major steel producing countries The World Iron and Steel Association announced the latest ranking of the world's 40 major steel-producing countries (regions) in 2022. China ranked first with 1.013 billion tons of crude steel production (a year-on-year decrease of 2.1%), and India (124.7 million tons, a year-on-year increase of 5.5%) ranked first. Second, Japan (89.2 million tons, down 7.4% year-on-year) ranked third, the United States (80.7 million tons, down 5.9% year-on-year) ranked fourth, and Russia (71.5 million tons, down 7.2% year-on-year) ranked fifth . In 2022, global crude steel production will be 1.8785 billion tons, a year-on-year decrease of 4.2%. According to the ranking, among the world's top 40 steel-producing countries (regions) in 2022, 30 countries' crude steel production will decline year-on-year. Among them, in 2022, Ukraine's crude steel production will drop by 70.7% year-on-year to 6.3 million tons, the larges

  Application of stainless steel in construction 1. The modernist architecture adopts the concept of exterior curtain wall. In 1948, an office building in Schenectady, New York, used stainless steel to decorate the exterior wall, which greatly reduced the dead load of the exterior wall, allowing an increase of one floor without changing the original frame and foundation structure. Many examples of the use of stainless steel curtain walls appeared in North America and other parts of the world in the 1950s. For example, Thyssenhaus in Dusseldorf, Germany is one of the high-rise buildings in Europe that use stainless steel. The trapezoidal curtain wall is decorated with SS316 stainless steel on the No. 4 surface with a thickness of only 1.0mm. It is a oriented building. In addition, the high-tech London Lloyd Building built in 1986 also used stainless steel curtain walls, making the artistic achievements of the building continue to this day.  2. Stainless steel is a very strong and durabl

  Stainless Steel Profile Specifications Stainless steel profiles are stainless steel materials with different cross-sectional shapes obtained by hot-melting and extruding stainless steel rods. The production process of stainless steel profiles mainly includes three processes: casting, extrusion and coloring. Among them, coloring mainly includes: oxidation, electrophoretic coating, fluorocarbon spraying, powder coating, wood grain transfer and other processes. Stainless steel angle steel: specification <10mmX10mm-/150mmX150mm Stainless steel flat steel, stainless steel square steel: specification 10mmX10mm——750mmX750mm Shengtian Industrial provides a full range of steel products and products.Steel material manufacturers in China.We can supply the steel plate ,steel coil,round steel,structural steel,flat steel. Contact me: Official website:https://p.st.company/ Mail:sale@st.company TEL: +863172099979

 Steel selection Steel products are widely used and have various varieties. According to the different cross-sectional shapes, they can be divided into four categories: profiles, plates, pipes and metal products. The selection of steel must not only ensure the safety and reliability of the structure, without fake and inferior products, but also be economical and reasonable, which must be treated with caution. The selection of steel should be based on factors such as the importance of the structure, load characteristics, connection methods, working environment, stress status and steel thickness. Shengtian Industrial provides a full range of steel products and products.Steel material manufacturers in China.We can supply the steel plate,steel coil,round steel, structural steel ,flat steel. Contact me: Official website:https://p.st.company/ Mail:sale@st.company TEL: +863172099979

 How to identify inferior steel 1. Shoddy steel is prone to folding. Folding is a variety of fold lines formed on the surface of steel, and this defect often runs through the longitudinal direction of the entire product. The reason for the folds is that the counterfeit and inferior manufacturers pursue high efficiency, and the reduction is too large, resulting in ears. Folds will occur in the next rolling process, and the folded products will crack after bending, and the strength of the steel will drop greatly.  2. Fake and inferior steel products often have pockmarks on the surface. Pockmarked surface is a defect of irregular unevenness on the surface of the steel due to severe wear of the rolling groove. Because manufacturers of fake and inferior steel products want to pursue profits, it often happens that groove rolling exceeds the standard.  3. The surface of fake and inferior steel is prone to scarring. One is that the material of fake and inferior steel is uneven and there are ma

Chemical composition of steel       In addition to the main chemical composition Fe iron, steel also contains a small amount of carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), oxygen (0), nitrogen (N), titanium (Ti), vanadium (V) and other elements, although the content of these elements is small, they have a great influence on the properties of steel. 　　Carbon is the most important element to determine the performance of steel, which affects the mechanical properties of steel such as strength, plasticity and toughness. When the carbon content in the steel is below 0.8%, as the carbon content increases, the strength and hardness of the steel increase, and the plasticity and toughness decrease; but when the carbon content is greater than 1.0%, as the carbon content increases, the steel's Intensity decreased instead. The carbon steel used in general engineering is low carbon steel, that is, the carbon content is less than 0.25%, and the carbon content of low all

 Non-ferrous metals Also known as non-ferrous metals, it refers to metals and alloys other than ferrous metals, such as copper, tin, lead, zinc, aluminum, and brass, bronze, aluminum alloys, and bearing alloys. In addition, chromium, nickel, manganese, molybdenum, cobalt, vanadium, tungsten, titanium, etc. are also used in industry. These metals are mainly used as alloy additions to improve the performance of metals. Among them, tungsten, titanium, molybdenum, etc. are mostly used to produce knives. hard alloy. The above non-ferrous metals are called industrial metals, in addition to precious metals: platinum, gold, silver, etc. and rare metals, including radioactive uranium, radium, etc. Shengtian Industrial provides a full range of steel products and products.Steel material manufacturers.In china.We can supply the steel plate,steel coil,round steel,structural steel,flat steel.

  Black metal Refers to the alloy of iron and iron. Such as steel, pig iron, ferroalloy, cast iron, etc. Both steel and pig iron are alloys based on iron with carbon as the main additive element, collectively referred to as iron-carbon alloys. Pig iron refers to the product made by smelting iron ore in a blast furnace, which is mainly used for steelmaking and casting. Smelting cast pig iron in an iron melting furnace to obtain cast iron (liquid, iron-carbon alloy with a carbon content greater than 2.11%), and casting the liquid cast iron into castings, this type of cast iron is called cast iron. Ferroalloy is an alloy composed of iron, silicon, manganese, chromium, titanium and other elements. Ferroalloy is one of the raw materials for steelmaking. It is used as a deoxidizer and alloy element additive for steel during steelmaking. Iron-carbon alloys with a carbon content of less than 2.11% are called steel, and steel is obtained by putting pig iron for steelmaking into a steelmaking fu

 Rust removal of steel When steel corrodes, as the volume increases, the steel bars in reinforced concrete will cause the concrete to swell and crack. At present, there are three general rust removal methods as follows. 1) Wire brush to remove rust All the rust on the surface of the steel can be brushed off manually with a steel wire or a semi-automatic wire brush until the metal surface is exposed. This method has low work efficiency and the quality of rust removal cannot be guaranteed. 2) Pickling and derusting Put the rusted steel into the pickling tank, remove the oil and rust respectively until the surface of the component is all iron gray, and clean it up to ensure that there is no residual acid on the surface. This method is more thorough than manual rust removal, with high work efficiency and good effect. 3) Sand blasting to remove rust Clean the rust on the surface of the steel through a sandblasting machine until the surface of the component is off-white, and there must be no

 Protection against steel corrosion In actual engineering, there are three main methods of protection against steel corrosion. 1) Protective film method The protective film is used to isolate the steel from the surrounding medium, thereby avoiding or slowing down the damaging effect of the external corrosive medium on the steel. Such as spraying paint, enamel, plastic, etc. on the surface of steel; or using metal plating as a protective film, such as zinc, tin, chromium, etc. 2) Electrochemical protection method According to the specific cause of corrosion, it is divided into no-current protection method and applied current protection method. The no-current protection method is also called the sacrificial anode method. It is to connect a metal that is more active than steel on the steel structure, such as zinc and magnesium. Because the potential of zinc and magnesium is lower than that of steel, zinc and magnesium become the anode of the corrosion battery. to damage (sacrificial anode

 Corrosion of steel Corrosion of steel refers to the destruction of its surface due to chemical reaction with the surrounding medium. Corrosion can occur in many media that cause corrosion, such as moist air, soil, industrial waste gas, etc. As the temperature rises, the chemical reaction accelerates, and the degree of corrosion is accelerated. The steel is severely corroded during storage, not only the cross-sectional area becomes smaller, the material is reduced or even scrapped, but also the derusting work is very expensive. Derusting during use not only reduces the stressed area, but also causes local rust pits to cause stress concentration and promote early failure of the structure. Especially when the structure bears repeated loads, the steel will produce corrosion fatigue phenomenon, which will greatly reduce the fatigue strength and cause brittle fracture. Corrosion is classified according to the different effects of the steel surface and the surrounding medium 1) chemical corr

  What are the advantages of work steel Gongfang is a kind of economic section steel with a better section mechanical performance. The characteristics are as follows: → Wing width wide, and the side can be rigid. Strong anti -bending ability, → The surface of the wings is parallel to each other to make the connection, add one, and the installation is easy → Compared with general steel, the cost is low, high accuracy, and small residual stress. It does not require expensive welding materials and weld testing, saving about 30%of the steel structure production cost. Under the same section load. The weighing weight of the hot car H steel structure is 15%-20%compared with the traditional structure. → Compared with the structure of the concrete, the steel structure can increase by 6%, and the structure of the structure is reduced by 20%and one 30%, reducing the internal force of the structural design Working steel can be processed and formed steel. The honeycomb beams can be combined to form

  The difference between flat steel and belt steel        A width is greater than 50mm and the thickness is greater than 3mm. Band steel is usually used to make and process H -shaped steel. 　　The difference between flat steel and belt steel is: Bian Gang is a passing section. It can be said to be a block shape such as 1.5*60*2150. It is greater than 50mm, the thickness is greater than 3mm, and the steel is usually used to make and process H -shaped steel. 　　Flat steel can be considered a category of steel plates. Flat steel is mainly plate -shaped steel for ordinary structures. It is mostly used for construction and ordinary mechanical parts. The total name of this type of material. Flat steel refers to steel with a wide 12-300mm, thickness of 4-60mm thick. 　　Flat steel can be a finished steel, or it can be used as a welded pipe and it is expected to be broken and the thin plate for stacked sheets is bad. Main use: flat steel can be used as a material to make hoop iron, work and mechan

  Ordinary carbon structural steel 　　Ordinary carbon structural steel, also known as ordinary carbon steel, has wide restrictions on carbon content, performance range, and content of phosphorus, sulfur and other residual elements. In China and some countries, it is divided into three categories according to the guarantee conditions of delivery: Class A steel (Class A steel) is the steel with guaranteed mechanical properties. Class B steel (Class B steel) is steel with a guaranteed chemical composition. Special steel (C-type steel) is a steel that guarantees both mechanical properties and chemical composition, and is often used to manufacture more important structural parts. China currently produces and uses the most A3 steel (Class A No. 3 steel) with a carbon content of about 0.20%, which is mainly used for engineering structures. 　　Some carbon structural steels also add trace amounts of aluminum or niobium (or other carbide-forming elements) to form nitrides or carbide par

  The difference between round steel and other steel bars 　　1. The shape is different. The shape of the round steel is smooth and round, without grain and ribs. The surface of other steel bars has grooves or ribs, which results in a small bond between the round steel and concrete, while other steel bars and concrete. Strong adhesion. 　　2. The composition is different. Round steel (first-grade steel) belongs to ordinary low-carbon steel, and other steel bars are mostly alloy steel. 　　3. The strength is different, the strength of round steel is low, and the strength of other steel is high, that is, compared with other steel bars, round steel with the same diameter can bear less tensile force than other steel bars, but the plasticity of round steel is higher than that of other steel bars. Strong, that is, the round steel has a large deformation before being broken, while the deformation of other steel bars is much smaller before being broken.

  How many types of steel are there 　　Steel is not a single product. There are currently more than 3,500 different types of steel with varying physical, chemical and environmental properties. 　　About 75% of the steel in use today was developed in the past 20 years. To rebuild the Eiffel Tower today, engineers would only need a third of the steel. 　　A new type of steel used in modern cars is stronger than before, yet weighs 35 percent less than before.

 How steel is tempered 　　There are two main steelmaking processes commonly used in the world: blast furnace-blown oxygen furnace and electric arc furnace steelmaking, and there are also steelmaking methods that use a combination of the two steelmaking processes or other different processes. 　　The main difference in the process lies in the raw materials used. The main raw materials of blast furnace-blown oxygen furnace are iron ore, coke, and scrap steel, while electric arc furnace mainly relies on scrap steel and electricity for steelmaking. Other metallic iron raw materials such as direct reduced iron, molten iron can also be used for EAF steelmaking depending on plant setup and scrap steel availability. 　　BF-BOF steelmaking production accounted for 70.7%. First, iron ore is reduced to obtain iron, also called molten iron or pig iron, and then the molten iron is smelted into steel in an oxygen top-blown converter. After casting and rolling, the molten steel is processed int

  Kaiping steel plate 　　Some steel plates are coiled when they come out of the steel mill. The flat plates of these steel plates after being flattened by the machine are called "open flat plates". Usually these open flat plates are much cheaper than the original flat plates (or called middle plates) that are rolled flat. .

Pickling steel plate 　　The pickling plate is made of high-quality hot-rolled sheet as raw material. After the pickling unit removes the oxide layer, trims the edge, and finishes, the surface quality and use requirements (mainly cold-rolled forming or stamping performance) are between hot-rolled and cold-rolled. The intermediate product between plates is an ideal substitute for some hot-rolled and cold-rolled plates. Compared with hot-rolled sheets, the advantages of pickling sheets are mainly: 　　1. The surface quality is good. Because the hot-rolled pickled plate removes the surface oxide scale, the surface quality of the steel is improved, and it is convenient for welding, oiling and painting. 　　2. The dimensional accuracy is high. After leveling, the plate shape can be changed to a certain extent, thereby reducing the deviation of unevenness. 　　3. Improve the surface finish and enhance the appearance effect. 　　4. It can reduce the environmental pollution caused by users&

  Indefinite length (usually length) 　　Where the product size (length or width) is within the range specified by the standard and does not require a fixed size, it is called indeterminate. Indeterminate length is also called normal length (pass length). For metal materials delivered in irregular lengths, as long as they are delivered within the specified length. For example, for ordinary round steel not greater than 25mm, its usual length is specified as 4-10m, and round steel with a length within this range can be delivered.

steel 　　Steel is a material ingot, billet or steel that is processed by pressure into various shapes, sizes and properties we need. 　　Steel is an essential and important material for national construction and the realization of the four modernizations. It is widely used and has a variety of varieties. According to the different cross-sectional shapes, it is generally divided into four categories: profiles, plates, pipes and metal products. In order to facilitate the production and ordering of steel Supply and do a good job in operation and management, and are divided into heavy rail, light rail, large-scale steel, medium-sized steel, small-sized steel, cold-formed steel, high-quality steel, wire rod, medium-thick steel plate, thin steel plate, electrical silicon steel sheet, strip steel, Seam steel pipe, welded steel pipe, metal products and other varieties.

  Length dimension of steel plate and steel strip 　　1) Generally, it is calibrated in millimeters (mm) of the thickness d of the steel plate. The steel strip is calibrated in millimeters (mm) of the width b and thickness d of the steel strip.        2) The individual steel plates have specified different sizes, such as hot-rolled steel plates: 1mm thick steel plates, with a width of 600×length 2000 mm; 650×2000 mm; 700×1420 mm; 750×1500 mm; 900×1800 mm; 1000×2000mm etc.

  Mechanical properties of steel 　　1. Yield point (σs) When the steel or sample is stretched, when the load exceeds the elastic limit, even if the load is no longer increased, the steel or sample still continues to undergo significant plastic deformation, which is called yield. The minimum stress value at which the yield phenomenon occurs is the yield point. Let Fs be the external force at the yield point s, and S be the cross-sectional area of the sample, then the yield point σs = Fs/S(MPa), MPa is called MPa, which is equal to N (Newton)/mm2, (MPa=106Pa, Pa: Pascal =N/m2) 　　2. Yield strength (σ0.2) The yield point of some metal materials is very inconspicuous, and it is difficult to measure. Therefore, in order to measure the yield characteristics of the material, the permanent residual plastic deformation is equal to a certain value (usually the original length) 0.2%), called the conditional yield strength or yield strength σ0.2 for short. 　　3. Tensile strength (σb) is th

  Classification of steel        There are various classification methods of steel, and there are eight main methods: 　　1. Classified by quality  (1) General steel (phosphorus P≤0.045%, sulfur S≤0.050%)  (2) High-quality steel (both P and S≤0.035%)  (3) High quality steel (P≤0.035%, S≤0.030%) 　　2. Classified by chemical composition (1) Carbon steel: a. Low carbon steel (carbon C≤0.25%); b. medium carbon steel (carbon C≤0.25~0.60%); c. high carbon steel (carbon C≤0.60%). (2) Alloy steel: a. Low-alloy steel (total content of alloying elements ≤ 5%); b. Medium-alloy steel (total content of alloying elements > 5-10%); c. High-alloy steel (total content of alloying elements > 10% %). 　　3. Classified by forming method (1) Forged steel; (2) cast steel; (3) Hot rolled steel; (4) Cold drawn steel. 　　4. Classified by metallographic structure  (1) For annealing: a. hypoeutectoid steel (ferrite + pearlite); b. eutectoid steel (pearlite); c. hypereutectoid steel (pearlite + cement

  Q235NH weathering steel plate 　　Use of weathering steel plate Because of its better atmospheric corrosion resistance than weathering steel for welded structures, it is mainly used for bolted, riveted and welded structural parts for vehicles, containers, buildings, towers and other structures. When used as welded structural parts, the thickness of the steel should not be greater than 16mm. The welding performance of weather-resistant steel for welded structures is better than that of high-weather-resistant structural steel, and it is mainly used for welded structural parts for bridges, buildings and other structures.

  Q345qC-Z25 bridge steel plate 　　The Q345qC-Z25 bridge steel plate implements the GB/T 714-2015 standard. 　　Q stands for yield strength, 345 stands for small yield strength, q means bridge, C means quality grade, corresponding to the corresponding impact temperature and impact energy value, Z is the Z-direction performance, that is, the performance of the steel plate thickness direction, and Z25 is the Z-direction performance level requirements. 　　The above is the introduction of the meaning of the Q345qC-Z25 bridge steel plate grade.

Q390B steel plate   　　Q390B steel plate use and application range: 　　Steel plates of this type are often used in various types of engineering machinery, such as drilling rigs, electric shovels, electric wheel reverse trucks, mining vehicles, excavators, loaders, bulldozers, various cranes, coal mine hydraulic pressure Manufacture and production of mechanical equipment such as brackets and other structural parts. It is also used in other industries, such as high-rise buildings, steel structure workshops, bridge engineering, and ship engineering. 　　Q390B steel plate characteristics:        Medium carbon quenched and tempered steel, cold heading die steel. The steel is easy to process, and can obtain certain toughness, plasticity and wear resistance after proper heat treatment. Normalizing can promote the spheroidization of the structure and improve the cutting performance of the hardness less than 160HBS rough. Tempering at a temperature of 550~570°C, the steel has excellent