Crossover bends in metallurgical units are used in pipelines for cooling systems, supplying of liquids and gases under pressure. In view of the active placement environment, copper-based thick-walled tubular materials such as brass of the CuZn5 type are used. Due to the small need for crossover bends re-placing, their purchase is impractical, and low-tool methods should be consid-ered for manufacturing. The expansion of known method for bent axis parts ob-taining by buckling on the CuZn5 tubular blanks for the metallurgical units crossover bends production is proposed in this paper. The mathematical model for the stress-strain state determination at any point of a CuZn5 tubular blank which is buckling has been developed. It is revealed that a Gaussian function is suit to describe the shape of buckled tube for crossover bends. Collation of cal-culated and experimental results showed their satisfactory convergence: for change the blank axis length – 2.08%, for the deflection along the axis line – 15%, for the blank wall thickness – 6%. Dangerous zones have been identified in which pipe wall folding can occur at high upset reduction.