202 stainless steel 304 which one is better? In fact, there is no standard answer to this question. We can only say which one is more suitable for you, 202 stainless steel and 304 stainless steel. This article will teach you how to distinguish 202 stainless steel and 304 stainless steel from the composition of stainless steel and the difference between the two.

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After the stainless steel plate is stretched and formed, its surface will appear rough, which is called the orange peel phenomenon. As the name suggests, the surface has textures like orange peel, and it becomes rough to the touch. Obviously, this is very different from the smooth surface of our common stainless steel plates.

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The following precautions should be understood when using stainless steel plates: 1. When using stainless steel plates, if there are welding shavings, cement, oil stains, white ash, putty, sand ash, etc. attached to the surface of the product, it should be cleaned in time, otherwise it will cause rust or mildew after a certain period of time.

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Steel is obtained by properly mixing carbon into iron. In the iron and steel industry, those with a carbon content of less than 2.11% are called steel, and those with a carbon content greater than 2.11% are called iron. Stainless steel is also called alloy steel. Cobalt, Chromium, nickel, tungsten, titanium and other metals.

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Stainless steel will also rust under certain conditions. Stainless steel has the ability to resist atmospheric oxidation -- that is, rust resistance, and also has the ability to resist corrosion in media containing acids, alkalis, and salts -- that is, corrosion resistance However, the size of its anti-corrosion ability is changed with the chemical composition of the steel itself, the state of interaction, the use conditions and the type of environmental media.

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The difference between stainless steel and cold rolled steel is very big. The maximum thickness of common cold-rolled steel is 8mm. Generally, hot-rolled steel coils are used as raw materials to produce beautiful and useful cold-rolled steel. Each coil can reach 13.5 tons.

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In the production and processing of stainless steel plates, the pickling process is indispensable, but sometimes pickling will cause various defects on the surface of the stainless steel plate. In order to prevent the formation of defects, it is necessary to have a clear understanding of the reasons for their formation, so as to maximize the success rate of pickling.

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The quality of the continuous casting slab of stainless steel plate will directly affect the quality of the final product, so it is necessary to analyze the factors affecting the quality of the continuous casting slab and the corresponding control measures.

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Stainless steel is made by adding alloys, namely chromium and nickel, to steel. According to the composition of stainless steel, stainless steel is divided into four main types: ferritic, martensitic and precipitation hardening, duplex and austenitic. Nickel plus carbon, manganese and nitrogen form austenitic stainless steels. Chromium plus silicon, molybdenum and niobium form ferritic stainless steels. The structure of stainless steel welds can be largely predicted based on their chemical composition. Due to their different microstructures, alloy groups have different welding characteristics and are susceptible to different welding defects.

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Thermal coloring is the thickening of the naturally existing oxide layer on the surface of the stainless steel plate, and the formed color is similar to toning, which is the effect of light interference. This is due to the difference in optical path length between the light reflected from the surface of the oxide film and the light reflected from the oxide/metal interface, which results in a range of colors depending on the thickness of the oxide layer.

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The main difference between hot rolled and cold rolled stainless steel is a process. Hot rolling refers to processing performed with heat, and cold rolling refers to processes performed at or near room temperature. Although these processes affect overall performance and application, they should not be confused with the formal specification and grade of steel, metallurgical composition and Properties Grades Steels of various grades and specifications may be hot rolled or cold rolled, including basic carbon steels and other alloy steels.

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SCC is a form of corrosion related to a specific combination of factors, mainly tensile stress, corrosive environment, sufficiently high temperature, etc. Usually around 50 degrees Celsius, but may occur at lower temperatures around 25 degrees Celsius in certain environments, especially swimming pools.

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There are several stainless steel families with different physical properties. The magnetic properties of stainless steel are very dependent on the elements added to the alloy. A basic stainless steel has a "ferritic" structure and is made magnetic by the addition of chromium, which can be hardened by the addition of carbon, making it "martensitic". However, the most common stainless steels are "austenitic" - these have a higher chromium content and also have nickel added. Nickel is what changes the physical structure of steel and makes it theoretically non-magnetic

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Phosphorus is one of the most harmful elements in steel, especially in stainless steel. It not only intensifies the composition segregation of stainless steel, but also has a very adverse effect on the resistance to pitting corrosion, stress corrosion resistance and welding performance of stainless steel. Reducing the phosphorus content in stainless steel has always been a concern of metallurgists. Until now, this problem has not been well resolved, and it is still the largest research topic in refining technology.

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The first one: that is to directly use anti-rust oil for anti-rust, that is, the so-called oil film anti-rust, and it is called physical anti-rust. The second: that is the so-called chemical anti-rust method, which is the stainless steel passivation anti-rust that is often used by customers. The anti-rust agent is a metal anti-rust, and it is called the chemical passivation anti-rust method. It is completely different from the principle of physical antirust. The principle of physical anti-rust is to isolate the surface of stainless steel from the air so as not to be oxidized, while the stainless steel passivation solution is in contact with the surface of the workpiece to produce a chemical reaction, transforming the chromium-poor layer of stainless steel into a chromium-rich layer so that The workpiece achieves the anti-rust effect of high salt spray, which is dozens of times stronger than traditional anti-rust oil, and the surface is clean and fresh.

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