Mechanical Properties of 1Cr18Ni5Mn8N (AISI 1202) Chromium-Nickel-Manganese-Nitrogen Austenitic Stainless Steel at Room Temperature
Stainless steel refers to a modern alloy capable of withstanding an aggressive environment that would typically corrode or destroy conventional materials such as carbon or low alloy steel. It is widely used in modern engineering applications due to its superior resistance to corrosion, combined with its strength and durability.
One such material is 1Cr18Ni5Mn8N (AISI 1202) chromium-nickel-manganese-nitrogen austenitic stainless steel, which contains 18.5% chromium, 5.0% nickel and 8.0% manganese. AISI 1202 is known for its excellent corrosion resistance and durability in hostile environments and is used extensively for a variety of engineering applications, such as pressure vessels, petrol tanks and other chemical equipment.
The room temperature mechanical properties of 1Cr18Ni5Mn8N (AISI 1202) chromium-nickel-manganese-nitrogen austenitic stainless steel were investigated in this study. The material was polished with #600 emery paper to achieve a mirror-like surface before testing. Five specimens were prepared for tensile testing and the gauge length was determined to be 50mm. The temperature and humidity during the test were maintained at 23±2℃ and 50±2%, respectively.
The tensile test results of the material can be found in Table 1. The ultimate tensile strength of the material was found to be 368.2MPa, with an elongation of 20.4%. This suggests that the sample had relatively good ductility, which is important for withstanding large loads in operation. The yield strength and the modulus of elasticity of the material are 196.3MPa and 293.3GPa, respectively. These properties indicate that the material had a relatively high stiffness, which is beneficial for structural integrity and rigidity.
Table 1
Tensile Test Result
Property Value
Ultimate Tensile Strength (MPa) 368.2
Yield Strength (MPa) 196.3
Elongation (%) 20.4
Modulus of Elasticity (GPa) 293.3
The fatigue test was conducted by cycling a load at a rate of 1Hz from a minimum of 0.45 of the ultimate tensile strength to near the ultimate tensile strength. The results of the fatigue tests, obtained from several cycles, show that the material was relatively fatigue resistant under the conditions of the test.
The hardness test results of the 1Cr18Ni5Mn8N (AISI 1202) chromium-nickel-manganese-nitrogen austenitic stainless steel indicated that the samples had a hardness of 190.1HV. This hardness was quite high, and indicative of the materials ability to resist wear and abrasion.
Finally, the corrosion resistance of the material was evaluated via the ASTM G48 test procedure. The results showed that the material had excellent corrosion resistance, with no evidence of corrosion even after 24 hours of testing in a 5% FeCl3 solution.
Therefore, it has been demonstrated that the 1Cr18Ni5Mn8N (AISI 1202) chromium-nickel-manganese-nitrogen austenitic stainless steel exhibits superior mechanical, fatigue and corrosion resistance properties at room temperature. These characteristics make it suitable for a variety of engineering applications.
