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Common use and classification criteria for aluminum sheets


aluminum sheet

Common use and classification criteria for aluminum sheets




Common uses for aluminum panels are:


Lighting, solar reflectors, architectural decoration, interior decoration, ceiling and wall, furniture, cabinets, elevators, signs, nameplates, bags, interior and exterior decoration, interior decorations: such as photo frames, aluminum paintings, reliefs, etc. : refrigerators, microwave ovens, audio equipment, etc., aerospace and military, such as China’s large aircraft manufacturing, Shenzhou spacecraft series, satellites, etc., mechanical parts processing: mold manufacturing, chemical, insulation pipe coating.




Aluminum sheets are usually divided into the following two categories:


  1. Thickness

       Thin aluminum sheet                0.15mm~2.0mm

       Regular aluminum sheet             2.0mm~6.0mm

       Medium thickness aluminum plate   6.0mm~25.0mm

       Thick aluminum plate               25mm~200mm

       Super thick aluminum plate          Over 200mm


  2. Alloy composition

       High-purity aluminum sheet

     (rolled from high-purity aluminum with a content of 99.9% or more)


    Pure aluminum plate

    (the composition is basically rolled from pure aluminum)


       Alloy aluminum plate

    (composed of aluminum and auxiliary alloys, usually aluminum copper, aluminum manganese, aluminum silicon, aluminum magnesium, etc.)


    Composite aluminum plate or brazing sheet

    (special purpose aluminum sheet material made by means of various materials composite)


    Aluminum-aluminum sheet

    (aluminum sheet is covered with a thin aluminum plate for special purposes)

    In the aluminum alloy, the grade is representative. The following is an example of the 7075T651 aluminum plate. The first 7 represents the aluminum and aluminum alloy group – aluminum zinc magnesium alloy. Aluminum and aluminum alloy groups are divided into nine categories. Among them, aluminum, aluminum alloys of 1, 3, 5, 6, and 7 series are mainly used. Among them, 1 series and 3 series aluminum plates are the most commonly used. Other series have less chance of being used in actual use.

    The first category:      1 series  industrial pure aluminum

    The second category:   2 series  aluminum copper alloy

    The third category:     3 series  aluminum manganese alloy

    The fourth category:   4 series  aluminum silicon alloy

    The fifth category:     5 series  aluminum-magnesium alloy

    The sixth category:     6 series  aluminum magnesium silicon alloy

    The seventh category:  7 series  aluminum zinc magnesium copper alloy

    The eighth category:   8 series  other alloys

    The ninth category:    9 series  spare alloy


    Technical quality requirements for aluminum sheets:


    First, the most basic point is that the surface of the aluminum sheet must be clean, no cracks and some other oxidized impurities are allowed.

    Second, due to the imperfection of the process, the surface of the sheet is allowed to have defects such as depression, scratching or roll indentation, but the depth must not exceed the allowable negative deviation of the sheet, and if the deviation value is exceeded, it will be remade.

    Third, the process of coating the aluminum thick plate allows the falling portion of the coating layer and the bubbles of the coating layer.

    Fourth, under normal circumstances, the surface of the sheet is allowed to have defects within the thickness difference.

    Fifth, other requirements are mainly prepared by the purchaser and the supplier themselves, and then the process is changed.

    The above is about the quality requirements of the surface of the aluminum plate. Although there are some errors for some reasons, it is absolutely impossible to exceed the controllable deviation value.


Post time: Nov-20-2019
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