Mechanical properties of 0Cr18Ni16Mo5 Austenitic Stainless Steel S31848
In recent years, stainless steel S31848 (0Cr18Ni16Mo5) Austenitic stainless steel has gained much attention from the metalworking industry due to its good performance in engineering applications. The unique combination of chemical elements present in its composition determines that this alloy had an excellent combination of mechanical properties, corrosion resistance and machinability.
The chemical composition of stainless steel S31848, containing about 0.03 percent Carbon, 17.5-20.5 percent Chromium, 11.0-13.0 percent Nickel, 2.5-3.5 percent Molybdenum and other minor elements, was initially designed to meet the demanding requirements of oil and gas processing industries, since the material is resistant to stress corrosion, cracking and corrosion fatigue.
Due to its balanced chemistry, S31848 stainless steel offers excellent toughness, even at cryogenic temperatures, as well as good creep strength. Additionally, alongside its mechanical properties, this alloy has also great formability and weldability, which makes it very suitable for varied applications in many industries.
The mechanical properties of S31848 stainless steel can be divided into two categories: strength and ductility.
Strength: In terms of strength, the tensile strength (or the ability to withstand stretching forces) of an S31848 stainless steel sample is typically 550 MPa in the annealed condition. The yield strength (the limit of load afterwhich the sample will deform plastically) and the ultimate strength, which is the strength above which the sample will break, are usually higher than 600MPa and 720MPa respectively. On the other hand, the proof strength (a measure of ductility) is usually 350-470 MPa.
Ductility:The ductility of S31848 stainless steel is impressive, with a relative elongation higher than 50%, even at very low temperatures. Specifically, this means that the alloy can be stretched 50% of its length without breaking. Moreover, the impact strength of the alloy is very high, with an impact energy typically around 100J for an annealed sample.
In conclusion, the combination of chemical elements forming stainless steel S31848 (0Cr18Ni16Mo5) recommend it for the most demanding parts, where the excellent combination of mechanical properties, corrosion lethargy and weldability are required. The mechanical properties of S31848 stainless steel is characterized by an excellent combination of tensile and yield strength, proof strength and ductility, as well as a high impact strength. Thus, this alloy is recommended for a wide range of industrial applications.
