An accurate and simple model of stacking fault energy for alloys (solid solutions) has beendeveloped based on the embedded-atom method. The calculated value of stacking fault energy35 mJ/m2 for 304 austenitic stainless steel, is in a good agreement with the experimental one,30 mJ/m2. In the present model we find that the Hirth’s empirical relationship is also suitablefor alloy. An accurate and simple model of stacking fault energy for alloys (solid solutions) has been developed based on the embedded-atom method. The calculated value of stacking fault energy 35 mJ / m2 for 304 austenitic stainless steel, is in a good agreement with the experimental one , 30 mJ / m2. In the present model we find that the Hirth’s empirical relationship is also suitable for alloy.