5754 aluminum alloy with moderate strength, good corrosion resistance, weldability and easy processing forming characteristics, is Al-Mg alloy typical alloys. Abroad, 5754 aluminum alloy sheet different heat treatment in the automotive industry (car doors, mold, seals), the main material used in canning industry. Applications 5754 aluminum is widely used in welded structures, storage tanks, pressure vessels, marine structures and marine facilities, transport tank and for requiring excellent processing performance, excellent corrosion resistance, high fatigue strength, high weldability and moderate static the intensity of the occasion. 1 aluminum surface, the surface does not allow cracks, corrosion spots and nitrate traces. 2. Allow the surface defect site where the depth does not exceed the nominal wall thickness of the skin from size 8 percent, bubbles, surface roughness over and local mechanical damage, but can not exceed the maximum defect depth 0.5mm, defect total area does not exceed the total area of ??the plate 5%. 3, allows the supplier to the lighting along the longitudinal sections smooth surface. 4. Other requirements: the demand side and the supply side to develop their own chemical composition of the physical properties of silicon Si: 0.40; copper Cu: 0.10; Mg Mg: 2.6 ~ 3.6; zinc Zn: 0.2; Mn Mn: 0.50; chromium Cr: 0.30; iron Fe: 0.40; Al Al: margin. Single: 0.05. Mechanical Properties Tensile strength σb (MPa): 165 ~ 265. Aluminum with national standards (GB / T 3880-2006), unified standard applies to aluminum strip material. Heat Treatment 1) homogenization: Heat 440 ℃; holding 12 ~ 14h; air cooling. 2) rapid thermal annealing: heating 350 ~ 410 ℃; holding time 30 ~ 120min; air or water. 3) high temperature annealing: heating 350 ~ 420 ℃; finished thickness ≥6mm or <6mm, the holding time of 2 ~ 10min or 10 ~ 30min; air cooling. 4) low-temperature annealing: heating 250 ~ 300 ℃ or 150 ~ 180 ℃; holding time of 1 ~ 2h, air cooling