The work environment of the ship requires that the structural material has certain mechanical strength, fatigue strength, elongation and impact resistance, and the welded structure also requires good welding strength. In shipbuilding, metal semi-finished products should be punched, bent, twisted, finishing and cutting operations, the material required to have a satisfactory shape. Thus, the mechanical properties of marine grade aluminum alloy design and construction of the ship is particularly important. In addition, marine grade aluminum alloy material development, development and production are also inseparable from the mechanical properties of the material.  
Hull structure aluminum alloy
The main structural material 5083 marine grade aluminum alloy shipbuilding the minimum yield strength, plate (O state) of 130Mpa, extrusion profiles (H112 state) of 110Mpa.5083-H32 marine grade aluminum alloy plate minimum yield strength is 220Mpa, butt welding The yield strength of the weld can be reduced to the O state value, so the design must use 130Mpa.6000 marine aluminum butt weld after T6 treatment, the yield strength value can only reach the T4 degree, so T4 state yield The intensity value becomes the standard. 6N01-T5 marine grade aluminum butt weld yield strength of the representative value of 120Mpa, the minimum yield strength value of 100Mpa is more appropriate.