Aluminum-magnesium-manganese plate is a metal roofing and wall material widely used in the construction industry. It is made of three metal elements, aluminum, magnesium and manganese. The following is a detailed introduction to aluminum-magnesium-manganese plate：

1. Material composition and characteristics
Main components:
Aluminum (Al) (accounting for about 90%~96%): provides light weight, corrosion resistance and plasticity。
Magnesium (Mg) (1%~5%): enhances strength and hardness, and improves fatigue resistance。
Manganese (Mn) (0.5%~2%): improves corrosion resistance and welding performance。
Other trace elements (such as silicon, iron, etc.) are used to further optimize performance。

Core advantages:
Lightweight and high strength：low density (about 2.7g/cm3), strength is better than pure aluminum。
Corrosion resistance： a dense oxide film is formed on the surface, which is resistant to acid, alkali and salt spray, and is suitable for coastal or industrial environments。
Flexible and easy to process： can be rolled into complex shapes such as waves and fans, adapting to curved roof designs.
Durability：lifespan can reach 30~50 years, anti-oxidation and fading。
Environmentally friendly and recyclable：100% recyclable, in line with green building standards。

2. Common types and surface treatment
Alloy grades:
AA3003 (mainly manganese)： general type, balanced strength and formability。
AA3004 (higher magnesium content)： suitable for high-strength demand scenarios。
AA5052 (5% magnesium content)：higher strength, used in harsh environments。

Surface treatment:
Fluorocarbon coating (PVDF)： UV resistance, strong weather resistance, long-lasting color。
Anodizing:：Form a protective layer, improve wear resistance, and retain the metal texture。
PE/PET coating： economical, suitable for indoor or low-corrosion environments。

3. Application areas
Building roofs：large-span buildings such as airports, gymnasiums, and exhibition centers。
Curtain wall system：decoration and protection of modern building facades。
Interior decoration：ceilings, partitions, etc., with both beauty and functionality。
Transportation facilities：places with high weather resistance requirements such as subway stations and tunnels。

4. Construction points
Connection method:
Standing Seam：hidden fixation, waterproof and wind pressure resistant。
Flat lock buckle：strong decorative effect, suitable for curtain walls。
Base treatment：waterproof layer and insulation layer are required to ensure overall performance。
Maintenance： clean up surface debris regularly and check coating integrity。

5. Precautions
Design stage： thermal expansion and contraction need to be considered (linear expansion coefficient is about 23.2×10??/℃), and expansion joints should be reserved。
Transportation and installation：avoid scratching the surface coating, and professional tools are required for cutting (such as toothless saws)。
Fire resistance：melting point is about 660℃, and fireproof layer needs to be added to meet building specifications。