Features and scope of application:
High strength wrought aluminum has high plasticity in the hot state and is easy to forge.The intensity after quenching and artificial aging is similar to that of hard aluminum.The process performance is good, but there is extrusion effect, so the longitudinal and transverse performance are different.The corrosion resistance is good, but intergranular corrosion tendency;Good machinability, resistance welding, spot welding, seam welding, arc welding and gas welding.
Chemical composition of 2A70 aluminum round bar: silicon Si: 0.35 iron Fe: 0.9~1.5 copper Cu: 0.9~2.5 manganese Mn:0.20 magnesium Mg: 1.4~1.8 Zinc Zn: 0.30 titanium Ti: 0.02~0.10 nickel Ni: 0.9~ 1.5al
Mechanical properties: tensile strength of column b (MPa) : greater than or equal to 355 elongation rate: greater than or equal to 5 (%) : greater than or equal to 12
Chemical properties corrosion resistance: the alloy has stress corrosion tendency.It is necessary to fill the anode film with potassium bichromate after anodization to improve the corrosion resistance.
