2A02 aluminum alloy is a high era of hard aluminum, which is characterized by high strength at room temperature, but also has high thermal strength, belongs to heat-resistant hard aluminum. Alloys are highly plastic when thermally deformed, and in squeezing semi-finished prodsucts, there is a tendency to form coarse crystal rings, which can be heat-treated and reinforced, and used in quenching and artificial aging. Compared with 2A70 and 2A80 heat-resistant forged aluminum, corrosion stability is better, but there is a tendency of stress corrosion and rupture, welding than 2A70 slightly better, good cutting.
Chemical Composition of 2A02 Aluminum Round Bar Rod
Silicon Si: 0.30
Iron Fe: 0.30
Copper Cu: 2.6-3.2
Magnesium Mg: 2.0-2.4
Zinc Zn: 0.10
Manganese Mn: 0.45-0.7 Titanium Ti: 0.15
Aluminum Al : Allowance
Note: Single: 0.05; Total: 0.10
Mechanical properties:
Tensile strength σb (MPa): ≥430
Conditional yield strength σ0.2 (MPa): ≥275
Elongation δ5 (%): ≥10
Note: Longitudinal mechanical properties of bars at room temperature
Heat treatment specifications
1)Rapid annealing: heating 350 to 370 degrees C, insulation time 30 to 120 min depending on the effective thickness of the material, air or water cooling
2）Quenching and aging: quenching 495 to 505 degrees C, water-cooled;