1956 Volume 25 Issue 12 Pages 681-688
Various tests on the inert-gas metal-arc welding of a corrosion resisting aluminum-magnesiummanganese alloy "ANP", have been performed with ANP-O and ANP- 1/4H plates, 1/4in. in thickness, and various consumable electrode wires, 2S, 52S, A54S, 56S and ANP. The present report Part 3 discusses the mechanical properties of butt-welded joints, joint efficiencies, strain-stress curves and yield stresses, distribution of deformation in a tensile test specimen and hardness distribution related with weld thermal cycle.
The main conclusions are as follows;
(1) The joint efficiency of the butt-welded joint increased with magnesium content of the filler wire, but practically with little difference for wires, A54S, ANP and 56S.
(2) The yield and tensile strengths of the butt-welded joint was almost the same for O-and 1/4-plates, because the heat-affected base metal, approximately 6mm in width and adjacent to the weld metal, had been annealed to the same hardness with weld heat in both the tempers of base metal. Yielding and fracturing of the tensile specimen occured in the said heat affected zone, and of which the maximum temperature attained during welding was above 400°C.
