1. Reducing the carbon content of steels 000Kh25 and 000Kh28 to 0.005% does not eliminate susceptibility to ICC. 2. The susceptibility to ICC of low-carbon ferritic steels after heating at high temperatures depends on the cooling rate. Quenching in water increases the resistance of these steels to ICC. 3. Stabilizing annealing at 780°C for 1 h is an effective method of increasing the resistance of low-carbon ferritic steels to ICC.