Aluminum (Al) balance,
Zinc (Zn)≤0.20,
Titanium (Ti)≤0.20,
Silicon (Si)0.7～1.3,
Iron (Fe)0.000～0.500,
Manganese (Mn)0.40～0.8,
Magnesium (Mg)0.40～0.8,
Copper (Cu)≤0.10
Note: Individual: ≤0.05 Total: ≤0.15
Surface treatment:
Aluminum alloy sheets can be divided into two categories: non-painted products and painted products according to surface treatment methods.
1) Non-painted products
(1) It can be divided into hammered aluminum plate (irregular pattern), embossed plate (regular pattern) and pre-passivated alumina surface treatment plate.
(2) This type of product does not paint the surface of the board, has low requirements on the appearance of the surface, and has a low price.
2) Paint products
(1) Classification: According to the coating process, it can be divided into: spray-coated plate products and pre-roller coated plates; according to the type of coating, it can be divided into: polyester, polyurethane, polyamide, modified silicon, epoxy resin, fluorocarbon, etc.
(2) Among the various coatings, the main performance difference is the resistance to ultraviolet rays from the sun. Among them, the most commonly used coating on the front is fluorocarbon paint (PVDF), which has strong ability to resist ultraviolet rays; polyester can be selected on the back Or epoxy resin coating as protective paint. In addition, a removable protective film can be attached to the front.