[China Aluminum Network] I. Intensity:
Aluminum alloy doors and windows should have a tensile strength of 157 N/mm2 and a yield strength of 108 N/mm2.
Second, gloss:
The surface of aluminum alloy doors and windows cannot have blisters and ash. These two impurities appear as white spots and black spots on the aluminum alloy.
Third, the thickness:
Aluminum alloy sliding door has several series of 75, 88, 103, 120, etc., commonly used at home is 88 series; aluminum alloy window has 50, 55, 70, 76, 118, 130 and other series, according to the size of the window hole and wind pressure Windows, home aluminum sliding window can not be less than 55 series.
Fourth, oxidation degree:
The surface of the aluminum alloy is coated with an oxide film. The oxide film should have a thickness of 10 microns.
Fifth, flatness:
The aluminum alloy surface should be smooth without dents or bulges.
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