Mechanical Properties of Medium Alloy Duplex Stainless Steel 00Cr18Ni5MO3Si2, 00Cr18Ni5MO3Si2Nb

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00Cr18Ni5MO3Si2 and 00Cr18Ni5MO3Si2Nb duplex stainless steels are austenitic and ferritic stainless steels respectively. They have promising mechanical and metallurgical properties, which make them favorable for use in a variety of applications, such as in petrochemical, power and desalination plants, marine engineering, etc.

The mechanical properties of 00Cr18Ni5MO3Si2 and 00Cr18Ni5MO3Si2Nb depend on their chemical composition, the microstructure, other alloying elements and the heat treatment process used for the production of the material. The mechanical properties of both duplex stainless steels include tensile strength, yield strength, elongation and impact energy.

00Cr18Ni5MO3Si2 has a tensile strength of 660MPa, a yield strength of 485MPa and an elongation of 35%. The impact energy is 43J. The 00Cr18Ni5MO3Si2Nb alloy has a tensile strength of 620MPa, a yield strength of 425MPa and an elongation of 34%. The impact energy is 90J. Compared to 00Cr18Ni5MO3Si2, 00Cr18Ni5MO3Si2Nb has lower yield strength and tensile strength, but higher impact toughness.

The microstructure of 00Cr18Ni5MO3Si2 and 00Cr18Ni5MO3Si2Nb stainless steels consists of a two-phase structure. The two phases present in the microstructure are ferrite and austenite. The balanced microstructure of the alloy results in a more stable, higher strength material with improved corrosion resistance. The ferrite phase is more ductile than the austenite phase, while the austenitic phase confers better impact resistance, tensile strength and yield strength.

In summary, the 00Cr18Ni5MO3Si2 and 00Cr18Ni5MO3Si2Nb duplex stainless steels have an excellent mechanical properties, including good tensile strength, yield strength and impact toughness. Their balanced microstructure of ferrite and austenite improves corrosion resistance significantly, making them suitable for high-temperature, high pressure and corrosion-resistant applications.

00Cr18Ni5Mo3Si2 and 00Cr18Ni5Mo3Si2Nb are both alloy duplex stainless steel with 00Cr18Ni5Mo as the basic component. The difference is that the latter contains niobium. Here is an introduction to the mechanical properties of 00Cr18Ni5Mo3Si2 and 00Cr18Ni5Mo3Si2Nb stainless steel.

00Cr18Ni5Mo3Si2 stainless steel has good mechanical properties. Its tensile strength ranges from 600MPa to 800MPa, its yield strength is not less than 450MPa, and the elongation rate is over 25%. The hardness can be up to 220HB. 00Cr18Ni5Mo3Si2Nb has higher tensile strength than 00Cr18Ni5Mo3Si2, its tensile strength ranging from 850MPa to 1070MPa, and its yield strength is not less than 700MPa. Its elongation rate is also higher than 25%. It is hard to over 240HB.

In addition, it also has good fatigue strength and corrosion resistance. Its corrosion resistance is superior to 304 stainless steel and even austenitic stainless steel. It is widely used in marine and offshore engineering fields, Special heavy-duty fuel machines and salt-making industries. It successfully replaced 316L in some industries, while providing better performance than CN3MN.

In conclusion, 00Cr18Ni5Mo3Si2 and 00Cr18Ni5Mo3Si2Nb are all advantageous in terms of strength and corrosion resistance, making them suitable for a wide range of applications. Furthermore, they are promising materials in many fields, such as chemical, petroleum and other industries.