Disadvantages of Galvalume Steel

Since galvalume is a high-density coated alloy steel, in addition to having many advantages, it also has certain disadvantages:

1.Welding performance
Due to the increased mechanical properties of galvalume, the surface coating density of the inner base material is better and the manganese content is relatively high. Therefore, galvalume cannot be welded under ordinary welding conditions and can only be connected through rivets and other methods. In terms of welding, hot-dip galvanized steel sheets perform better and there are no welding problems. 2 Applicability of tidal temperature concrete
The composition of galvalume coating contains aluminum, which is prone to chemical reactions in direct contact with acidic, moist concrete. Therefore, it is not very suitable for floor boards.

3 Coating thickness and steel plate thickness restrictions
Most domestic galvanizing production units are modified from hot-dip galvanizing units, and there are certain restrictions on the thickness of galvanized steel sheets. Steel plate thickness is only limited to 0.27 to 2.5. In terms of coating, it can only achieve a minimum of 30 grams per square and a maximum of 220 grams per square. Precautions
Storage: It should be stored indoors such as a warehouse, kept dry and ventilated, and should not be left in an acidic climate for a long time. When storing it outdoors, it must be protected from rain to avoid oxidation stains caused by condensation.

Transportation: To avoid external impact, SKID should be used to support steel coils on transportation vehicles to reduce stacking and take rainproof measures.

Processing: When shearing COILCENTER, the same lubricating oil as the aluminum plate must be used. When drilling or cutting galvanized steel sheets, scattered iron filings must be removed promptly.