Effect of Co, introduced instead of Mn into a high-temperature weldable 1151 alloy on a hot-shortness of the alloy under preservation in it of transition metals of IV(Ti, V) and V (Zr) period is shown. The effect of each separate metal and a combination of two and three used transition metals is established. The work was carried out using the experiment planning method (linear factor plan). The results are presented in the form of tables and diagrams.