With the advancement of the construction industry, the use of high-strength steel has gradually increased. High-strength steels can withstand higher stresses compared to conventional steels, yet they exhibit less ductility. Currently, due to their high cost, they are primarily utilized in specialized industries. Connecting two steel pieces requires the use of welding or bolts. Fillet welding is the simplest and most commonly used type of welding. Therefore, investigating this type of weld in high-strength steel is of great importance. Fillet welds can also have different angles in the direction of applied force, which itself affects their strength.
In this study, the influence of the welding angle on the axis of the applied force has been examined. First, an experimental model, considering the effect of defects in the weld, was modeled and validated using ABAQUS software. Subsequently, specimens were analyzed at various angles. The maximum strength of the weld and its ductility were investigated. Additionally, the recommended strength of the American steel code for welds at different angles was examined. The results showed a 14% average difference from the code. Unlike mild steels, an increase in the welding axis angle with the direction of the applied force increased the ductility of the fillet weld.