Aluminum materials for the ceiling are aluminum alloy, there can be no pure aluminum. But because of the different alloy content caused by the mechanical properties of aluminum alloy is different, the current domestic use of smallpox materials for aluminum alloy is divided into five grades:
The first grade: aluminum-magnesium alloy, also contains part of the manganese, the biggest advantage of the material is good antioxidant capacity, and because of the manganese content, so have a certain strength and stiffness, is the ideal material to do smallpox. China's Southwest aluminum plant aluminum processing performance of the most stable.
The second grade: aluminum-manganese alloy, the material strength and stiffness slightly better than aluminum-magnesium alloy. But the antioxidant capacity is slightly lower than the aluminum-magnesium alloy. Such as both sides are carried out protective treatment, basically to solve its antioxidant capacity is not as good as the shortcomings of aluminum-magnesium alloy, domestic Ruimin aluminum aluminum processing performance of the most stable.
The third grade: aluminum alloy, the alloy of manganese, magnesium content less. So its strength and stiffness are significantly lower than the aluminum-magnesium alloy and aluminum-manganese alloy (but its price is expensive). Because of its soft, easy to process, as long as a certain thickness, the basic to meet the most basic flatness