6063 is the representative alloy for extrusion, the strength is lower than 6061, the extrusion property is good, can be used for complex section shape of the shape of the material, corrosion resistance and surface treatment are good. ② It is a low alloying Al-Mg-Si high plastic alloy. It has many valuable characteristics:

1. Heat treatment strengthening, high impact toughness, sensitive to lack.

2. It has good thermoplasticity and can be extruded into complex structure at high speed. Thin wall. Hollow profiles or forging into complex structure forgings, wide quenching temperature range, low quenching sensitivity, extrusion and forging after demoulding, as long as the temperature is higher than quenching temperature. Quenching can be done by spraying water or through water. Thin wall parts (6 less than 3mm) can also implement wind quenching.

3. Excellent welding performance and corrosion resistance, no stress corrosion cracking tendency. Among the aluminum alloys that can be strengthened by heat treatment, Al-Mg-Si alloy has no stress corrosion cracking phenomenon found in 6063. 4. After processing, the surface is very smooth and easy to anodize and stain. Its disadvantage is that if it is parked at room temperature for a period of time after quenching, it will bring adverse effects on the strength (parking effect).

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