Duplex Stainless Steel 2205/1.4462 Duplex Stainless Steel
When heat treated properly, the microstructure of duplex stainless steels has almost equal proportions of austenite and ferrite. This microstructure ensures that duplex steels are more resistant to stress corrosion cracking (SCC) than austenitic stainless steels.
Duplex steels have a 0.2% standard stress that is more than twice that of austenitic stainless steels such as 1.4301 and 1.4404. This usually allows for downward measurements in designs based on Young's modulus and buckling limits.
Product introduction of 2205/1.4462 duplex stainless steel
Duplex steels have a toughness-to-brittleness transition temperature of about -40 ° C or lower. These steels also embrittle when exposed to temperatures between 300 ° C to 550 ° C (475 ° C embrittlement) and 550 ° C to 1000 ° C (σ phase and x phase formation). Therefore, the application temperature is usually limited to between -50 ° C and 300 ° C.
The higher chromium, molybdenum and nitrogen content significantly improves 1.4462's pitting and crevice corrosion resistance in the presence of chloride. 1.4462 also has better general corrosion resistance than 1.4404 in most environments.
1.4462 is a material ideal for use in environments containing chlorides and hydrogen sulfide, such as marine environments and the oil and gas extraction and processing industry.
Typical applications also include the chemical industry (processing, transportation and storage, such as pressure vessels, storage tanks and pipelines), the pulp and paper industry (digesters and liquid storage tanks), and the mining industry.
Therefore, 1.4462 has been widely used in the production of YouTube and gas production lines for extracting oil and gas from sulfur-containing wells, refineries and chloride-contaminated process solutions. 1.4462 is also particularly suitable for heat exchangers that use chloride-containing water or brackish water as a cooling medium.
