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The most commonly used method of aluminum welding is gas arc welding using a fusible electrode (MIG method) and a non-fusible electrode (TIG method). In machine construction aluminum alloys are commonly used, which the 5xxx series alloys are characterized by high strength and corrosion resistance. The work presents the properties of EN AW-5754 alloy, which is a material that allows joining elements by welding. The aim of the paper is to present mechanical properties test results of EN AW-5754 alloy welded joints with the 131 method for various values of linear welding energy: Q = 70 kJ/mm and Q = 1280 kJ/mm. The obtained results indicate a significant influence of linear welding energy on the strength of the welded joint.