The difference between 304 stainless steel pipe and 321 stainless steel pipe
Difference between 304 stainless steel pipe and 321 stainless steel pipe 304 stainless steel pipe is a grade of stainless steel produced according to American ASTM standards. 304 stainless steel pipe is equivalent to China's 0Cr19Ni9 (0Cr18Ni9) stainless steel pipe. 304 contains chromium 19%, nickel 9%.
304 stainless steel pipe is widely used as stainless heat-resistant steel, food equipment, general chemical equipment, and equipment for atomic energy industry.
The 304 stainless steel pipe is a versatile stainless steel pipe that is widely used to make equipment and parts that require good overall performance (corrosion resistance and formability).
304 stainless steel pipe is the most widely used stainless steel, heat-resistant steel. For food production equipment, Xitong chemical equipment, nuclear energy and so on.
304 stainless steel chemical composition specification C Si Mn PS Cr Ni (nickel) Mo SUS304 ≤ 0.08 ≤ 1.00 ≤ 2.00 ≤ 0.05 ≤ 0.03 18.00-20.00 8.25~10.50 - A high alloy that resists corrosion in air or in chemically aggressive media Steel, stainless steel has a beautiful surface and good corrosion resistance, does not have to undergo surface treatment such as plating, and play the inherent surface properties of stainless steel, used in a variety of steel, commonly known as stainless steel. Representative performance of 13 chrome steel, 18-8 chromium nickel steel and other high alloy steel.
From the metallographic point of view, since the stainless steel contains chromium and forms a thin chromium film on the surface, this film separates and invades oxygen from the steel and acts as a corrosion resistance. In order to maintain the inherent corrosion resistance of stainless steel, steel must contain more than 12% chromium.
321 Stainless Steel Seamless Steel Pipe (GB3087-1999) is used to manufacture high-quality carbon for superheated steam pipes, boiling water pipes, superheated steam pipes for boilers of various structures, large smoke pipes, small smoke pipes, and arched bricks. Prime structural steel hot-rolled and cold drawn (rolled) seamless steel tubes.
321 stainless steel pipe: High-quality carbon structural steel, alloy structural steel and stainless heat-resistant seamless steel pipe for steam boiler piping, etc., which are mainly used to manufacture high pressure and above pressure, these boiler pipes are operated under high temperature and high pressure by the party. The tube will also be oxidized and corroded under the action of high-temperature flue gas and water vapor. Therefore, the steel pipe requires high endurance strength, high oxidation resistance, and good organization stability, and hydraulic pillar pipe.
321 stainless steel with steel number:
High-quality carbon structural steel steel 20G, 20MnG, 25MnG; 304 stainless steel.
Alloy structural steel grades 15MoG, 20MoG, 12CrMoG, 15CrMoG, 12Cr2MoG, 12CrMoVG, 12Cr3MoVSiTiB, etc.; rust heat-resistant steel commonly used 1Cr18Ni9, 1Cr18Ni11Nb high-pressure boiler tubes in addition to ensuring chemical composition and mechanical properties, it is necessary to do root pressure test, to For flaring and flattening tests.
321 stainless steel pipes are delivered in heat-treated condition. In addition, there are certain requirements on the microstructure, grain size, and decarburization layer of the finished steel pipe. Geological drilling and seamless steel tubes for oil drilling control; use drilling rigs to drill wells for exploration of underground rock formations, groundwater, oil, natural gas, and mineral resources.
Container house are easy to install and disassemble, and have obvious advantages in use!
Container house are also a kind of Prefab Houses, which can meet the needs of daily living, and also have the advantages of convenient disassembly and installation, and are used in many construction sites. Moreover, the size and specifications of the house can be customized and processed, and the installation can be completed quickly, which is also conducive to long-term use. So what are its advantages?
Easy to transport
Compared with other construction houses, container houses are convenient for daily use and easy to transport, and are very suitable for units that frequently change construction sites. The container house itself is made of steel plate, which is economical, environmentally friendly and durable, and it adopts a steel frame as a whole, which has a very good anti-seismic effect, strong stability, and a certain degree of airtightness. While it is convenient for daily use, it can also avoid water ingress, etc., and can also meet people's living needs.
Various spaces can be formed
This type of house does not need to lay a foundation, it can be constructed and installed directly, and can generate a variety of space combinations. In particular, some large-scale construction sites may not only need basic dormitories, but also need meeting rooms, kitchens, and bathrooms. Compared with directly building other houses, the advantages of using container houses are also very obvious. Its standard width is generally about two or three meters, and houses of different sizes can also be customized, and the construction is also very simple. In particular, the construction of the Folding Container House only takes 10 minutes and is very simple.
Easy to disassemble
The steel plates of the container can be disassembled, and the performance is stable, and the material can be recycled again, and there is no need to worry about generating construction waste, and it can also be recycled. Because the material itself has undergone anti-corrosion treatment, it also has a certain fire performance, so it can be cleaned frequently to ensure its long-term use.
cost-effective
The container house can be used for a long time after one-time installation, and it can also be disassembled and installed again at any time with the relocation of the construction site, which can save a lot of construction costs for dormitories, and is also very cost-effective. Moreover, it is an integral structure, and the interior can be decorated with wooden veneers, etc. It can also be moved synchronously, and it can save a lot of costs for long-term use.
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Henan Jinming Metal Material Co., Ltd. , https://www.jinminghouse.com