ASME 254 Stainless Steel Seamless Round Tubes SMO Cold Rolled SS 2" Sch Xxs
254 stainless steel, also known as SMO 254 or Alloy 254, is a highly corrosion-resistant austenitic stainless steel grade. It is specifically designed to offer exceptional resistance to a wide range of corrosive environments, making it suitable for demanding applications, including pipe systems. Here is a description of 254 stainless steel pipes:
Corrosion resistance: 254 stainless steel is renowned for its outstanding corrosion resistance, particularly in aggressive environments such as seawater, acidic solutions, and chloride-containing environments. It exhibits excellent resistance to pitting, crevice corrosion, and stress corrosion cracking, even at high temperatures.
High-temperature resistance: 254 stainless steel maintains its corrosion resistance and mechanical properties at elevated temperatures, making it suitable for applications that involve high-temperature fluids or environments. It can withstand temperatures up to approximately 1000°C (1832°F) without significant loss of strength.
Alloy composition: 254 stainless steel contains significant amounts of chromium, molybdenum, and nitrogen, which contribute to its superior corrosion resistance. It typically contains approximately 20-22% chromium, 18-20% nickel, 6-7% molybdenum, and 0.18-0.22% nitrogen.
Weldability: 254 stainless steel exhibits good weldability, allowing for easy fabrication and installation of pipe systems. It can be welded using common methods such as TIG or MIG welding, ensuring flexibility in manufacturing and repair processes.
Mechanical properties: 254 stainless steel offers excellent mechanical properties, including high tensile strength and impact resistance. It retains its strength and ductility even at low temperatures, making it suitable for applications where structural integrity is crucial.
Applications: 254 stainless steel pipes are commonly used in various industries, including chemical processing, oil and gas, desalination, pulp and paper, and marine applications. They are suitable for transporting corrosive fluids, such as seawater, acids, and chemical solutions, where high corrosion resistance and reliability are required.
It's important to note that 254 stainless steel is a specialized grade and may be more expensive compared to other stainless steel grades. It is typically chosen for applications where exceptional corrosion resistance is essential and where the cost is justified by the performance requirements.
According to different uses, the requirements for various properties of stainless steel pipes are different, such as acid and alkali corrosion resistance, intergranular corrosion resistance and stress corrosion cracking performance, pitting resistance, climate corrosion resistance, high temperature and oxidation resistance. For use in high temperature environment, it is also required to have satisfactory high temperature persistent strength, durable plasticity, creep resistance and aging stability.
Stainless steel pipe is mainly used for auxiliary exchanger pipe, water heater pipe, main pipe, cooling water pipe and other pipes. Electricity, as the basis of national economic development, national economy and people's livelihood. The inner wall of the stainless steel pipe is smooth, the water transmission resistance is small, can withstand the erosion of high water flow rate, after solution treatment, the mechanical properties of the pipe and the matrix, the corrosion resistance is basically the same, the performance is excellent, and it is widely used in heaters, boilers, heat exchangers, condensers.
China's production of seamless stainless steel pipes is mainly concentrated in Inner Mongolia Baotou Steel, Shanghai Five Steel (Group) Co., LTD., Great Wall Special Steel Co., LTD., Dalian Steel Plant, Fushun Steel Plant, Daye Special Steel Co., LTD., Chengdu Seamless Steel Plant, although the specific process equipment of each production facility is different. However, its production process is mainly divided into hot-rolled seamless stainless steel pipe production process, cold-working seamless stainless steel pipe production process and hot-extruded seamless stainless steel pipe production process.
254 Stainless steel tube parameter
chemical composition
| material | 254 | |||||||
| chemical composition | C% | Cr% | Ni% | Mn% | Si% | N% | P% | S% |
| ≦0.15 | 16.0-18.0 | 3.5-5.5 | 5.50-7.50 | ≦1.00 | ≦0.25 | ≦0.060 | ≦0.030 | |
| mechanical properties | Yield Strength | tensile strength | elongation | Hardness |
| ≧45 | ≧95 | ≧40 | ≦100 |
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