With the improvement of people’s living standards, 304 stainless steel is being used more and more widely, and there are more and more manufacturers of 304 stainless steel. Of course, there will inevitably be mixed with bad quality, which is very important to customers. It is said that how to choose has become a big headache. 304 stainless steel has a smooth surface, high plasticity, toughness and mechanical strength, and is resistant to corrosion by acid, alkaline gas, solution and other media. It is an alloy steel that does not rust easily, but not rust-free. 304 stainless steel plate refers to a steel plate that is resistant to corrosion by weak media such as atmosphere, steam and water, while acid-resistant steel plate refers to a steel plate that is resistant to chemical corrosive media such as acid, alkali, and salt. The following 304 stainless steel plate manufacturers will teach you how to distinguish the quality of stainless steel plates? 1. There should be no scratches on the surface of the stainless steel plate. This is a more critical point that directly affects the quality of the stainless steel mirror panel. If there are scratches on the stainless steel raw material...
The maximum carbon content of 316 stainless steel pipe is 0.03, which can be used in applications where annealing after welding cannot be performed and maximum corrosion resistance is required. 316 and 317 stainless steel (see below for the properties of 317 stainless steel) are molybdenum-containing stainless steels. The overall performance of this steel is better than that of 310 and 304 stainless steel. Under high temperature conditions, when the concentration of sulfuric acid is lower than 15% and higher than 85%, 316 stainless steel has a wide range of uses. 316 stainless steel also has good performance against chloride erosion, so it is usually used in marine environments. 316 stainless steel, also known as 00Cr17Ni14Mo2 corrosion resistance: The corrosion resistance is better than 304 stainless steel, and it has good corrosion resistance in the production process of pulp and paper. And 316 stainless steel is also resistant to erosion by marine and aggressive industrial atmospheres. Heat resistance In intermittent use below 1600 degrees and continuous use below 1700 degrees, 316 stainless steel has good oxidation resistance. In the range of 800-1575 degrees, it is best not to use 316 stainless steel continuously, but when 316 stainless steel is used...
Corrosion resistance of 304 stainless steel pipe: Average corrosion: 304 stainless steel pipe because of chromium content (22%), molybdenum (3%) and nitrogen content (0.18%), the corrosion resistance of 2205 is better than 316L and 317L in most environments. Local corrosion resistance of 316 stainless steel: The content of chromium, molybdenum and nitrogen in 304 stainless steel makes it have strong resistance to point erosion and crevice erosion in oxidizing and acidic solutions. Stress erosion resistance: The dual-phase microstructure of 304 stainless steel tube helps to improve the stress erosion cracking resistance of stainless steel. In the presence of certain temperature, stress, oxygen and chloride, austenitic stainless steel will undergo chloride stress intrusion. Because these conditions are not easy to control, the use of 304L, 316L and 317L is limited in this regard. Anti-erosion fatigue: The high strength and corrosion resistance of 304 stainless steel make it have a high resistance to erosion and fatigue. Processing equipment is susceptible to aggressive environments and loading cycles, and the properties of 2205 are ideal for such applications. Annealing atmosphere. 316 welded pipes generally use pure hydrogen as the annealing atmosphere, and the purity of the atmosphere is preferably more than 99.99%. If another...
According to the concept, steel has the following material classifications. Production method, chemical composition, there are different material classifications. 1 The concept of steel: Steel is a steel ingot, billet, or steel that is press-worked into the various shapes, sizes, and properties I need. With a wide range of applications and varieties, steel is an essential and important material for national construction and the realization of the four modernizations. According to the different section shapes, steel is generally divided into four categories: profiles, plates, pipes and metal products. Section steel, small section steel, steel cold-formed section steel, high-quality section steel, wire rod, medium and thick steel plate, thin steel plate, electrical silicon steel sheet, strip steel, seamless steel pipe steel, welded steel pipe, metal products and other varieties. 2 Production methods of steel Plastic deformation of the processed steel (bill, ingot, etc.). According to the processing temperature of the steel, it can be divided into two types: cold working and hot working. The main processing methods of steel are: most of the processing of steel is processed by pressure. A press working method with increased length, rolling: passing a steel metal blank through a gap (various shapes) of a pair...
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