7020 alloy is a Al-Zn-Mg system alloy, with a small amount of Mn and Cr, which was registered by the European Aeronautics and Space Association in 1972 at the American Aluminum Association. Its chemical composition is 0.35 Si, 0.40 Fe, 0.20 Cu, 0.05~0.50Mn, 1.0~1.4 Mg, 0.10~0.35 Cr, 4.0~5.0 Zn, 0.08~0.20, 4.0~5.0, and other impurities 0.05 0.05, a total of 0.15. In the T5 or T6 state, medium intensity, good solderability, low mechanical properties of Forgings: tensile strength and yield strength of Rm350N/mm - Rp - 280N/mm. It has been used in the automobile industry and the manufacturing of rail vehicles for forging complex shape forgings. 7020, the corrosion resistance of the alloy is medium. The mechanical properties of the welding are almost the same as those of the base material. After welding, it is advisable to do artificial aging treatment. The automotive industry uses this alloy to forge medium load parts and cut and weld.
Specification of 7020 aluminum alloy forgings
Available Temper: H112、O、F、T3、T4、T5、T6、T7、T8、T9、T651、T851、T451、T351
Maximum single unit weight: 800kg
Maximum diameter with quenching:2000mm
Maximum diameter without quenching: 2800mm