The structure and properties of 1.0–2.5 mm thick sheets of AK4-2ch high-temperature strength alloy

In comparison with AK4-1chAT1 alloy sheets AK4-2chAT1 alloy rolled sheets have close values of mechanical strength at room and increased temperatures but higher fracture toughness and lower fatigue crack growth rate. This makes it possible to recommend AK4-2chAT1 alloy in place of AK4-1chAT1 alloy for production of sheet.