Know these 6 key indicators of aluminum alloy door and window materials!

Thickness

The series number indicates the thickness of the door frame in millimeters. Aluminum alloy sliding doors are available in 70 and 90 series; the 70 series is sufficient for interior residential aluminum alloy sliding doors. Aluminum alloy sliding windows are available in 55, 60, 70, and 90 series; the choice depends on the window opening size and local wind pressure. Aluminum alloy sliding windows used for enclosed balconies should be at least 70 series.

Strength

The tensile strength should reach 157 Newtons per square millimeter, and the yield strength should reach 108 Newtons per square millimeter. The profile can be moderately bent by hand; it should return to its original shape after being released.

What are the material specifications for aluminum alloy doors and windows? Six key material specifications for aluminum alloy doors and windows to know!

Color

The color of the same aluminum alloy profile should be consistent. If there is a significant color difference, it should not be purchased.

Gloss

Aluminum alloy doors and windows should avoid purchasing profiles with open bubbles (white spots), slag (black spots), cracks, burrs, peeling, or other obvious defects on the surface.

What are the material indicators for aluminum alloy doors and windows? Six key material indicators for aluminum alloy doors and windows to know!

Flatness

Inspect the surface of the aluminum alloy profile; there should be no dents or bulges.

Oxidation

The oxide film thickness should reach 10 micrometers. When purchasing, you can lightly scratch the surface of the profile to see if the oxide film can be rubbed off.