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The difference between 2205 stainless Steel tube and S31803

The Difference Between 2205 Stainless Steel and S31803 Stainless Steel
Many people who are not familiar with stainless steel might think that S31803 stainless steel is the same as 2205 stainless steel, assuming that S31803 is the American standard grade and 2205 is the Chinese standard grade. However, this is a common misconception. The emergence of S31803 stainless steel was mainly in the 1970s for use in oil and gas pipelines. However, to improve the phase balance of this steel and avoid the precipitation of harmful phases, S32205 stainless steel pipes were derived from S31803 stainless steel, with the latter having a narrower range. Therefore, when strictly adhering to standards, 2205 stainless steel pipes can replace S31803 stainless steel, but not vice versa. Similarly, the unit price of the latter is slightly lower than that of the former. Our corresponding duplex steel grade is 00Cr22Ni5Mo3N. The differences in element content between the three are as follows:
2205 duplex stainless steel pipe is defined as a stainless steel with a structure composed of equal parts ferrite and austenite in its solid quenching organization, referred to as 2205 stainless steel pipe, also known as 2205 duplex steel pipe. The actual phase ratio is 45-55% ferrite and 55-45% austenite, respectively. The excellent performance of 2205 duplex stainless steel is ensured by the appropriate ratio of the two-phase structure.
2205 duplex stainless steel pipes have excellent mechanical properties, corrosion resistance, and good weldability, making them widely used in industries such as petroleum and natural gas, marine engineering, and chemical industry. The length of oil and gas pipelines laid using duplex stainless steel materials in the petroleum and natural gas industry has exceeded 850 km, with the vast majority being 2205 duplex stainless steel seamless steel pipes (some are also S31803 duplex stainless steel pipes and 2507 duplex stainless steel pipes). Due to the strong corrosiveness of the natural gas medium, high-pressure pipelines in the West-East Gas Pipeline Project all use 2205 duplex stainless steel materials.
The main applications of 2205 duplex stainless steel pipes are as follows:
- Neutral chloride environments
- Refining industry
- Petrochemical and chemical industries
- Pipeline transportation in chemical industry
- Petroleum and natural gas industry
- Pulp and paper industry
- Fertilizer industry
- Urea industry
- Phosphate fertilizer industry
- Seawater environments
- Energy and environmental protection industry
- Light industry and food industry
- Equipment in food and pharmaceutical industry
- High-strength structural components.
stainless steel Tube 2205

Duplex stainless steel tube 2205

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