The cleavage fracture toughness of steels was mezzo-scopically analyzed on the basis of the statistical local fracture criterion approach. The statistical stress criterion at the crack tip region suggests that the cleavage fracture toughness in steels can be described as a function of the yield stress. the cleavage fracture stress. and other mechanical properties of the materials. https://lightspeedlovers.shop/product-category/classic-vibrators/