Standard: GB / T 4437.1-2000 Features and Scope: Aluminum 1200 for industrial aluminum with high plasticity, corrosion resistance, electrical conductivity and thermal conductivity, but low intensity, heat treatment can not be strengthened, machinability bad; can welding, welding and exposure to atomic hydrogen welding, brazing is not easy; easy to withstand the pressures processing and extension, bending. Chemical Composition: Aluminium Al: 99.00 Copper Cu: ≤0.05 Zinc Zn: ≤0.10 Mn Mn: ≤0.05 Titanium Ti: ≤0.05 Fe + Si Fe + Si: 0.000 ~ 1.000 Note: Single: ≤0.05; Total: ≤0.15 Mechanical Properties : Tensile strength σb (MPa): 75 ~ 105 Elongation δ10 (%): ≥22 Elongation δ5 (%): ≥25 Note: longitudinal pipe temperature mechanical properties Sample Size: All Thickness Heat treatment specifications: 1 ) rapid thermal annealing: heating temperature of 350 ~ 410 ℃; with the effective thickness of different materials, holding time between the 30 ~ 120min; air or water. 2) high temperature annealing: heating temperature of 350 ~ 500 ℃; finished thickness ≥6mm, the holding time of 10 ~ 30min, <6mm, the hot topic so far; air cooling. 3) low-temperature annealing: heating temperature 150 ~ 250 ℃; holding time of 2 ~ 3h; air or water.