Abstract
1. Steels of type 90Kh28MFTAL containing 0.5–0.85% C are in a nonequilibrium condition. Their structure is alloyed ferrite and complex carbides of the M7C3 type. Steel with 1% C is in an equilibrium condition and it consists of alloyed ferrite with a complexly alloyed M23C6 type carbide. 2. An increase in carbon content from 0.5 to 1% does not lead to a marked reduction in chromium in solid solution. The degree of the reduction in chromium concentration in solid solution depends on the alloying capacity of the complex carbide formed. 3. A change in the amount of chromium from 20 to 27% with a carbon content up to 0.6% does not markedly affect the strength properties and hardness of the matrix and carbides.
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