40CrMoV4-6 is a grade of high-temperature and creep resistant steel that is used in applications such as power generation, transportation, construction, and chemical processing. The high strength and enhanced creep resistance of 40CrMoV4-6 make it an ideal choice for components that are exposed to heat and stress during operation. Its main uses include turbine shafts, cylinder liner, pressure vessel components, and turbine casings.
Due to the superior strength of 40CrMoV4-6, the steel can be used in the manufacture of gear boxes, and engine components. The microstructure of the material is composed of tempered martensite and bainite. The hardness of the material is between 32HRC and 35HRC. This property makes it suitable for applications where high strength and abrasion resistance are required.
40CrMoV4-6 is extremely resistant to both thermal and mechanical shock due to its combination of low carbon, a low alloying element, and high alloy elements. The high level of alloying elements ensures the steel remains ductile and creep resistant even at temperatures up to 425°C.
The superior strength of 40CrMoV4-6 makes it an excellent choice for components operating under extreme operating conditions such as turbines. The high strength of the steel makes it particularly suitable for applications involving rotating parts and shocks.
The mechanical properties of 40CrMoV4-6 steel are dependent on the thickness and heat treatment of the material. The steel has good jump and fatigue properties, with a yield strength of 890 MPa and 1020MPa for 26mm and 34mm thick sections respectively.
In terms of corrosion resistance, 40CrMoV4-6 has good resistance to both food grade and working environment corrosion at higher temperatures and humid conditions. The alloy is, however, sensitive to cold rolling which can cause corrosion and affect the mechanical properties of the steel.
Welding of 40CrMoV4-6 should be carried out using filler materials in the range of E8016-E8032. Post-weld heat treatment of the material is necessary, as the weldment may crack due to sensitization.
In conclusion, 40CrMoV4-6 is an ideal grade of steel for a variety of high temperature and creep resistant applications. Its high strength and creep resistance make it suitable for components that are exposed to heat and stress during operation. Its main uses include turbine shafts, cylinder liner, pressure vessel components, and turbine casings. Its excellent mechanical properties and corrosion resistant properties make it an ideal choice for fabrication.
