Application and Characteristics of 5052 Aluminium Strip
The main alloying element of 5052 aluminum strip is magnesium, which has good forming and processing properties, corrosion resistance, weldability and medium strength. It is used in the manufacture of aircraft fuel tanks, oil pipes, and sheet metal parts for transportation vehicles and ships, instruments and street lamp brackets, rivets, hardware, electrical enclosures, etc.
The 5052 aluminum strip is Al-Mg rust-proof aluminum. Compared with 3A21, 5A02 has higher strength, especially high fatigue strength; similar to 3A21, plasticity and corrosion resistance are high; Heat treatment can not be strengthened, weldability by contact welding and hydrogen atom welding is good, and there is a tendency of crystal cracking during argon arc welding; alloy has good machinability in cold hardening and semi-cold hardening, and poor machinability in annealed state , can be polished.
Tensile strength σb (MPa): ≤225
Elongation δ5 (%): ≥10
Specimen size: bar diameter (square bar, hexagonal bar inscribed circle diameter) ≤ 150.
Heat treatment specification:
1. Homogenization annealing: heating 440 ℃; holding 12 ~ 14 h; air cooling.
2. Rapid annealing: heating 350 ~ 410 ℃; holding time 30 ~ 120min; air cooling or water cooling.
3. High-temperature annealing: heating to 350-420 ℃; when the thickness of finished product is ≥ 6mm or < 6mm, the heat-insulating time is 2-10 min or 10-30 min; air cooling.
4.Low-temperature annealing: heating to 250-300 ℃ or 150-180 ℃; keeping the temperature for 1-2 h, air cooling.