Material Name: 6A02 formerly: LD2 Standard: GB / T 3191-1998 the main features and applications: a moderate intensity, high plasticity, after quenching and natural aging plastic is acceptable annealing and thermal state, and this state of anti- corrosion resistance can be compared with 5A02.3A21, artificial aging state alloy has tendency to intergranular corrosion, it can be hardened after cutting can still bad after annealing, the alloy can spot and hydrogen atoms welding, gas welding. Chemical composition: Si Si: 0.50-1.2 iron Fe: 0.50 Copper Cu: 0.20-0.6 Mn Mn: 0.15-0.35 or chromium Cr: 0.15-0.35 Mg Mg: 0.45-0.9 Zinc Zn: 0.20 Titanium Ti: 0.15 Al Al: I Other amounts: Single: 0.05 Total: 0.10 Mechanical Properties: Tensile strength σb (MPa): ≥295 Elongation δ5 (%): ≥12 Note: longitudinal bars at room temperature mechanical properties of the sample size: bar diameter (square bar , hexagonal bar inscribed circle diameter) ≤150