Comparison of Mechanical Properties and Resistance to Creep of 20MnCr5 Steel and X10CrAlSi25 Steel

A comparison of both mechanical properties at different temperatures and resistance to creep related to steels 20MnCr5 and X10CrAlSi25 were investigated. In this sense, engineering stress-strain diagrams and creep curves are presented. Based on the mentioned diagrams, ultimate tensile strength, yield strength and modulus of elasticity as well as creep resistance may be compared. From the other hand, in accordance to measured Charpy impact energy, an assessment of fracture toughness was also made. In accordance with the experimental data, it is possible to say that structural steel 20MnCr5 (UTS: 20 °C / 600 °C = 562 MPa / 147 MPa; YS: 20 °C / 600 °C = 398 MPa / 141 MPa) and heat - resistant steel X10CrAlSi25 (UTS: 20 °C / 600 °C = 584 MPa / 487 MPa; YS: 20 °C / 600 °C = 132 MPa / 123 MPa) has have quite similar levels of the considered strengths at considered temperatures. Also, their resistance to creep is similar.