What does 4040 mean?

There are many kinds of aluminum profiles. According to the alloy grade and the proportion of metal composition, the 4040 industrial aluminum profiles belong to the 40 series of 6063 alloy grades. The 4040 industrial aluminum profiles have different sections. Meicheng Aluminum has two kinds of 4040 industrial aluminum profiles: European standard and national standard. They are also divided into light and heavy types. It is really a little complicated to divide them carefully.
In addition to the commonly used aluminum profiles for doors and windows, such as 60 series, 70 series, 80 series, 90 series, curtain wall series and other building aluminum profiles, there is no clear model distinction for industrial aluminum profiles, but there are differences in cross sections. For example, the 4040AA aluminum profile in the 40 series has four corner slots that are square, and the corners are right angles, belonging to the national standard, with a weight of 0.87kg/m, while the 4040B aluminum profile has four corners that are circular, There is also an internal hook in the card slot, which makes the goods more firm and looks more beautiful. The weight is 1.80kg/m. These two types of light profiles are mainly used in light frame structures or other lines with less load bearing.