Abstract
The effect of welding conditions on the reaction stress which produced in one pass welded steel was studied by the rigid restraint cracking test machine. Experiments of reaction stress were made by changing the value of each factor of welding conditions such as groove size, heat input, weld length and welding process. The reaction stress was not influenced by heat input when values of other factors were not changed. Equations for estimation of the reaction stress were derived from restraint intensity, mechanical properties of steel and welding conditions.
