High Temperature Mechanical Properties of 0Cr15Ni5Cu3Nb(15–5PH)

The mechanical property of SUS303Cu-0Cr15Ni5Cu3Nb(15-5ph) at high temperature is one of the main concerns of metals and alloys in general. SUS303Cu is an austenitic stainless steel possessing corrosion resistant and good mechanical properties at high temperatures. The austenitic stainless steels have no definite melting point because of the formation of γ-Fe. In this study, the high temperature mechanical properties of SUS303Cu-0Cr15Ni5Cu3Nb(15-5ph) have been investigated in order to assess the effectiveness of this alloy in terms of its mechanical performance at elevated temperatures.

The specimens of SUS303Cu-0Cr15Ni5Cu3Nb(15-5ph) were prepared and different types of measurements were taken. Tensile tests were conducted to know the tensile strength, yield strength and Youngs modulus of the alloy at different temperatures. Furthermore, Vickers hardness test and Charpy impact test were also conducted to assess the ductility and toughness of the SUS303Cu-0Cr15Ni5Cu3Nb(15-5ph) alloy at high temperatures. Finally, a Scanning Electron Microscope (SEM) was used to analyse the microstructural changes caused by increasing temperature.

The results obtained from the tensile test showed that the tensile strength, yield strength and Youngs modulus of the SUS303Cu-0Cr15Ni5Cu3Nb(15-5ph) alloy increased with increasing temperature. The maximum tensile strength, yield strength and modulus of elasticity of the alloy were 665 MPa, 593 MPa and 203 GPa respectively. Further, the Vickers hardness test and Charpy impact test revealed that the SUS303Cu-0Cr15Ni5Cu3Nb(15-5ph) alloy have good ductility and toughness properties even at high temperatures. Finally, the microstructural analysis revealed that the increase in temperature had no significant effect on the microstructure of the alloy.

In conclusion, SUS303Cu-0Cr15Ni5Cu3Nb(15-5ph) alloy possess good mechanical properties even at high temperatures. The tensile strength, yield strength and Youngs modulus of the alloy increased with increasing temperature. The Vickers hardness test and Charpy impact test revealed that this alloy has good ductile and toughness behaviour. Moreover, the microstructural analysis revealed no significant changes due to the increase in temperature. The result of this study provide insights into the mechanical properties of SUS303Cu-0Cr15Ni5Cu3Nb(15-5ph) alloy at high temperatures. This could be useful for selection of this alloy for elevated temperature applications.

The mechanical properties of the 0Cr15Ni5Cu3Nb(15–5PH) high chromium-nickel die steel are greatly affected by heat treatment and the microstructure changes of austenite, martensite and carbides. Due to its high carbon content, this steel has low hot workability and is difficult to weld. However, its wear resistance and corrosion resistance make it a suitable material for many applications.

The mechanical properties of 0Cr15Ni5Cu3Nb(15–5PH) steel depend upon its heat treatments, the cooling process and whether particles are added to the steel. The steel is heat treated by austenitizing, quenching and tempering. During austenitizing, the steel is heated to 950-1150°C and then cooled rapidly. This process develops a fine and homogeneous austenite structure.

During quenching, the steel is heated rapidly to 1000-1100°C and then cooled quickly in water or oil bath. This process develops martensite, which is strong and wear resistant. Finally, the steel is tempered at 500-600°C to develop a fine grained and homogenous microstructure. In addition, particles, such as chromium, nickel and molybdenum, can be added to the steel during heat treatment to improve its mechanical properties.

0Cr15Ni5Cu3Nb(15–5PH) steel exhibits high strength and ductility and is mostly used in aerospace components and high stress parts. The tensile strength of 0Cr15Ni5Cu3Nb(15–5PH) steel is 1000-1350MPa and its yield strength is 600-1450MPa. It also has a good fatigue strength and low notch sensitivity. Furthermore, the steel has good wear resistance and corrosion resistance.

In conclusion, 0Cr15Ni5Cu3Nb(15–5PH) steel is a high strength and ductile die steel which is suitable for aerospace components and high stress parts. The mechanical properties of the steel depend on the heat treatment, cooling process and the added particles. The steel also has good wear resistance, corrosion resistance, fatigue strength and low notch sensitivity.