21CrMoV5-7, 1.7709, 21CrMoV5-11, 1.8070 Steel and nickel alloys for fasteners with specific high and/or low temperature properties. Conforms to EN 10269
What is 21CrMoV5-7, 1.7709 grade steel?
21CrMoV5-7 alloy structural steel and its 21CrMoV5-11/(ie) 21CrMoV5-11 substitute alloy belong to the high-temperature boiler steel for energy industry. They are used to produce components/subassemblies for the power industry, small parts and large forgings at temperatures up to 550oC. The main applications of these steel grades are rotors for steam turbines, rotor blades, shaft forgings, vessels and covers for temperatures up to 550°C, nuts, pipes for temperatures up to 540°C. 21CrMoV5-7 is a steel for fasteners with specified elevated and/or low temperature properties. Imanite has been designed for nitriding, giving similar hardness distribution as case hardening. When using nitriding the distortion due to quenching after carburising can be avoided. Imanite is a M-steel version of 21CrMoV5-7 . M-treatment is very beneficial when the machining is done in Q&T condition and the hardness is about 300 HBW. Chrome Molybdenum Vanadium steel 21CrMoV5-7 is used for steam and gas turbine components and also for high temperature industrial boilers, valves and oil & gas applications. Bolts, studbolts, nuts, washers, bonet bolts parts of the turbine, pumps, valves etc.