characteristic 5A02 aluminum plate is AlMg series aluminum alloy, compared with 3A21, 5A02 aluminum plate has higher strength, especially with higher fatigue strength; similar to 3A21, plasticity and corrosion resistance are high; heat treatment cannot be strengthened, contact welding and hydrogen atom welding The weldability is good, and there is a tendency to crystal crack during argon arc welding; the 5A02 aluminum plate has good visit here machinability under cold work hardening and semi-cold work hardening state, poor machinability under annealing state, and can be polished. chemical composition: Aluminum Al: balance Silicon Si: 0.40 Copper Cu: 0.10 Magnesium Mg: 2.02.8 Manganese Mn: 0.150.40 Low Cr: 0.150.40 Titanium Ti: 0.15 Iron Fe: 0.0000.400 Iron + silicon Fe + Si: 0.0000.600 Note: Single: 0.05; Total: 0.15 Note: Longitudinal mechanical properties of bar at room temperature Sample size: bar diameter (square bar, hexagon bar inscribed circle diameter) 150 Heat treatment specifications: 1) get more Homogenization annealing: heating 440; heat preservation 1214h; air cooling. 2) Rapid annealing: heating 350410; holding time 30120min; air or water cooling. 3) High temperature annealing: heating 350420; when the thickness of the finished product is 6mm or klik the holding time is 210min or 1030min; air cooling. 4) Low temperature annealing: heating 250300 or 150180; holding time is 12h