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Mechanical Properties of Martensitic Stainless Steel S42020 2Cr13
Martensitic stainless steel is a kind of low alloy steel containing chromium. It is typically used in applications that require high strength and good corrosion resistance, such as medical instruments, valves and pumps, and centrifuges. One such martensitic stainless steel, S42020 2Cr13, is especially noteworthy for its combination of strength and hardness, making it a popular choice for those in need of a material that can take a beating but still remain intact. This article will discuss the various mechanical properties of S42020 2Cr13 and explain how they contribute to its overall strength.
When considering the mechanical properties of any material, it is important to have a basic knowledge of its composition. S42020 2Cr13 is an austenitic stainless steel, meaning that it is an alloy of iron, chromium and nickel mixed at elevated temperatures. It contains 12.0-14.0% chromium and 0.75-1.25% nickel, as well as small amounts of molybdenum, manganese and nitrogen. This combination provides the material with its inherent resistance to corrosion, as well as its strength.
The mechanical properties of S42020 2Cr13 are mainly determined by its hardness. The hardness of a material, or the ability to resist indentation and wear, is measured using the Rockwell scale. On the Rockwell scale, S42020 2Cr13 has a hardness of HRC32-36, meaning that it is relatively hard and resistant to abrasion. In addition to its resistance to abrasion, this material also has a high tensile strength and a very high yield strength. Its ultimate tensile strength is 930-1120 MPa, while its yield strength is 815-1000 MPa. This means that it has the strength to withstand substantial amounts of force before it yields or fails, making it an excellent choice for applications where high strength is needed.
The mechanical properties of S42020 2Cr13 also include its impact toughness. Impact toughness is the property that determines a material’s ability to withstand sudden impacts, such as hammer blows. On the charpy impact test, this material has an average impact energy of 720-900 J/cm2. This is an exceptional result, demonstrating the material’s impressive impact toughness.
Finally, S42020 2Cr13 has excellent fatigue strength. Fatigue strength is the property responsible for a material’s ability to resist a repeated permanent deformation, or crack propagation. On the endurance limit test, S42020 2Cr13 has an endurance limit of 350-400 MPa. This means that the material is able to withstand a long period of deformation without cracking or failing.
In summary, S42020 2Cr13 is an austenitic stainless steel that has excellent mechanical properties. Its hardness on the Rockwell scale is HRC32-36, its tensile strength is 930-1120 MPa, its yield strength is 815-1000 MPa, its impact energy is 720-900 J/cm2, and its fatigue strength is 350-400 MPa. These properties make S42020 2Cr13 an ideal choice for applications that require resistance to high force, wear, and corrosion.
