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Four types of steel

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We all know whether it is a building or a vehicle or a tool for everyday use. Most have steel components in it. Therefore, steel is everywhere in our daily lives. Different steels are also in different places. So the steel is also divided into 4 types. I stands for the first class steel: it belongs to carbon steel. Its carbon content is less than 1.35% (0.1%~1.2%), except for iron, carbon and limited impurities such as silicon, manganese, phosphorus and sulfur. Steel without other alloying elements. The performance of carbon steel depends mainly on the carbon content. As the carbon content increases, the strength and hardness of the steel increase, while the ductility, toughness, and weldability decrease.  Compared with other steels, carbon steel is the earliest use, low cost, wide performance range and maximum dosage. It is suitable for water, steam, air, hydrogen, ammonia, nitrogen and petroleum products with nominal pressure PN≤32.0MPa and temperature -30~425°C. The first clas...

Rare earth elements

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Rare earth elements serve as a strategic resource for non-renewable scarcity. It is known as "industrial vitamins" and "mother of new materials." It is widely used in cutting-edge technology and military fields. In the steel making process, only a small amount of rare earth is added to the steel. It will make the original high-quality steel more high quality and improve its service life. In the military field, rare earth can greatly improve the alloy tactical performance of weapons and equipment. For example, in the Gulf War, the night vision device with the addition of rare earth elements lanthanum became a source of overwhelming advantage for US tanks. In the field of nuclear energy, rare earth elements gadolinium and its isotopes are the most effective neutron absorbers. It can be used as an inhibitor to control the chain reaction of nuclear power plants. Become the patron saint of nuclear reactors. In reality, whether it is a tiny mobile phone screen, a digital ...

Marine steel

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Marine steel means steel used in the manufacture of hull structures for sea and inland vessels. High-quality carbon steel and high-quality low alloy steel are usually used. Marine steel requires certain strength, toughness and certain low temperature and corrosion resistance. And requires better welding performance. Due to the harsh working environment of the ship, the hull shell is subject to chemical corrosion, electrochemical corrosion and corrosion of marine organisms and microorganisms. The hull is subjected to large wind and wave impacts and alternating loads. The shape of the ship makes the processing method complicated and so on, so the steel for the hull structure is strictly required. First, good toughness is the most critical requirement.  In addition, high strength, good corrosion resistance, weldability, processability and surface quality are required.  In addition, high strength, good corrosion resistance, weldability, processability and surface quality are r...

Corrosion resistant steel

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As we all know, corrosion resistant steel is a kind of stainless steel, and its corrosion resistance is better than stainless steel. It is a steel that resists erosion in certain highly corrosive media. At the current stage of technological development, corrosion resistant steel is one of the most important structural materials. In recent years, the development of corrosion-resistant steel has been closely linked to important sectors of the national economy, including the chemical industry, aircraft manufacturing, atomic power, cryogenic technology, and space development. At present, the key R&D and application directions of corrosion-resistant steel in China are corrosion resistant steel in the aerospace industry, corrosion resistant steel plate for marine oil tanks, high corrosion resistant weathering steel for railway trains, steel for oil and gas transmission pipes and steel for oil well pipes. Wan Gang, Minister of Science and Technology of China, said that the steel indust...

Steel production

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    Nowadays,steel is used more and more widely. Such as buildings, bridges, ships, boilers, automobiles, agricultural machinery, aviation, chemical machinery, boilers, electricians, welding rods, etc. Therefore, steel is an indispensable part of our lives. As we all know, there are various varieties of steel. So, do you know why there are various varieties? In fact, the main reason for it is the steel delivery status. Popularly speaking, it is the last step in the production process. How you make the final step will determine what type of steel you produce. So let's talk about the delivery status of steel.     The steel delivery process can be divided into six parts. As follows, hot rolled condition, cold pull, normalizing state, annealed state, high-temperature tempering, solution treatment.     The steel is no longer specially heat treated after hot rolling or forging. And then direct delivery after cooling. Its temperature is generally 800~900°C.Due t...

How to choose the best steel

    As time goes, steel has become an indispensable part of our daily lives. It is an indispensable building material in construction. It is very important. Therefore, steel as an important part of our world. So the importance of the quality of steel to the building is self-evident. So in the next part, I will tell you how to choose the right steel.     I will summarize it into 5 parts. As follows: steel appearance, the purchase standard of steel, the guarantee condition of the steel, steel quality guarantee and technical conditions of steel.     The first, on the surface of the steel.If the surface is crusted or cracked. Then we can immediately judge that it is a poor quality product. Seen from the metallic luster. The poor quality product without metallic luster. It will show a reddish color. The transverse bars of the poor quality product will come out to fill the dissatisfaction. This is mainly the reason for the manufacturer. The cross-section of the...

Common steel properties and applications

   Nowadays, steel is used more and more widely. They have a variety of varieties. As far as I know, we can distinguish steel according to the shape of the section. They mainly divided into four categories. Mainly refers to carbon steel, alloy steel, stainless steel and tool steel. Now, let me tell you about the characteristics and fields of application of several common sheets of steel.     AISI 1045 steel is one of carbon steel. It is a medium tensile low hardenability carbon steel generally in the black hot rolled or occasionally in the normalized condition. Characterized by fairly good strength and impact properties, plus good machinability and reasonable weldability in the hot rolled or normalized condition. Typical applications are: Axles Various, Bolts, Connecting Rods, Hydraulic Clamps and Rams, Pin Various, Rolls Various, Studs, Shafts, Spindles, etc.     AISI 4140 alloy structural steel is one of alloy steel. It belongs to medium hardenability...