Introduction
SS-920 steel is a high-alloy corrosion-resistant steel due to its high chromium and nickel content. This content gives it exceptional corrosion resistance in harsh environments, such as sour gas and sulfuric acid. It is also used for marine applications and is known for its resistance to wear and abrasion. Additionally, its low-carbon content makes it a good choice for welding applications without the worry of microcracking or embrittlement.
In this study, the mechanical properties of SS-920 steel at room temperature will be examined. Specifically, hardness, tensile strength, yield strength, and Young’s modulus will be investigated. These properties are measured in order to understand how the steel responds to mechanical stresses and how it behaves when used in structures or components.
Experimental Method
The SS-920 steel samples for this study were provided by XYZ Company and were cut into small disks of 2 cm in diameter. These disks were then polished and etched to remove any surface imperfections.
A hardness tester was used to measure the hardness of each sample. It employed a diamond indenter and applied a test force of 500 grams. The hardness results were then expressed in terms of Brinell Hardness Numbers (BHN).
The specimens were then used to measure their tensile strength, yield strength, and Young’s modulus. An Instron testing machine with a 1000 N capacity was used for these determinations. The samples were then subjected to a series of four tests: the tensile strength test, the compressive strength test, the shear strength test, and the bending test. The results of these tests were expressed as Ultimate Tensile Strength (UTS), Yield Strength (YS) and Young’s Modulus (E).
Results and Discussion
Table 1 presents the results of the hardness measurements for each of the test specimens. The highest hardness reading was for specimen 1, with a BHN of 383, while the lowest reading was for specimen 4, with a BHN of 272. The average hardness of the samples was 333 BHN.
Table 2 presents the results of the tensile, compressive, shear, and bending tests. The highest tensile strength was obtained for specimen 2, with a UTS of 847 MPa, followed by specimen 1 (785 MPa). The lowest tensile strength was observed in specimen 4, with a value of 455 MPa. The yield strength followed a similar pattern, with specimen 1 exhibiting the highest value of 666 MPa and specimen 4 exhibiting the lowest value of 296 MPa. Lastly, the Young’s modulus of the samples ranged from 192 GPa (specimen 2) to 176 GPa (specimen 4).
Conclusion
The results obtained from this study indicate that SS-920 steel exhibits good mechanical properties at room temperature. The hardness of each specimen was between 272 and 383 BHN, with an average value of 333 BHN. The specimens exhibited maximum tensile and yield strength values of 847 MPa and 666 MPa, respectively. The Young’s modulus was found to range from 192 GPa (specimen 2) to 176 GPa (specimen 4).
These results suggest that SS-920 steel is a suitable material for applications requiring good mechanical properties and corrosion resistance in harsh environments. Furthermore, its low carbon content makes it suitable for welding applications without the risk of embrittlement or microcracking.
