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Currently on the market of aluminous gusset plate is divided into three grades: the first kind of aluminum magnesium alloy, while containing manganese, advantages of the material is the greatest antioxidant ability is good, and because of adding manganese, increased in strength and rigidity, ceiling The best material; second kinds of aluminum manganese alloy plate, the strength and stiffness is slightly better than that of aluminum magnesium alloy, but slightly less than third kinds of antioxidant capacity; aluminum alloy plate, the manganese, magnesium is less, so the strength and stiffness were significantly lower than that of aluminum magnesium alloy and aluminum Manganese alloy, oxidation resistance. 

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