chemical composition:
Silicon Si: 0.20-0.6
Iron: 0.35
Copper Cu: 0.10
ManganeseMn: 0.10
Magnesium Mg: 0.45-0.9
Chromium Cr: 0.10
ZincZn: 0.10
Titanium Ti: 0.10
Aluminum Al: balance
Others: Individual: 0.05 Total: 0.15
Mechanical properties:
Tensile strength σb (MPa): ≥150
Elongation stress σp0.2 (MPa): ≥110
Elongation δ5 (%): ≥7
Note: Longitudinal mechanical properties of rods at room temperature
Sample size: diameter ≤ 12.5
Main features and application scope:
It is a low alloyed Al-Mg-Si high plasticity alloy.
Has many valuable features:
1. Strengthened by heat treatment, with high impact toughness and insensitivity to dispensing.
2. It has excellent thermoplasticity and can be extruded at high speed into various profiles with complex structures, thin walls, and hollows or forged into forgings with complex structures. It has a wide quenching temperature range and low quenching sensitivity. After extrusion and forging, it can be demoulded. As long as the temperature is higher than the quenching temperature. It can be quenched by spraying water or water penetration. Thin-walled parts (6<3mm) can also be air-quenched.
3. Excellent welding performance and corrosion resistance, no tendency of stress corrosion cracking. Among aluminum alloys that can be strengthened by heat treatment, Al-Mg-Si alloy is the only alloy in which no stress corrosion cracking phenomenon has been found.
4. The surface after processing is very smooth and easy to anodize and color. The disadvantage is that if it is parked at room temperature for a period of time after quenching, it will have an adverse effect on the strength (parking effect).