DX51D+ZAM275 Zn-Al-Mg Alloy Steel Strip

• The meanings of each part in "DX51D+ZAM275" are as follows:
• D: indicates flat steel for cold forming.
• X: indicates the type of substrate, usually non-cold-rolled substrate (different from the cold-rolled substrate represented by "C" at the beginning).
• 51: used to represent the steel grade serial number. The 51 grade does not require yield strength. The carbon content of this type of steel is not more than 0.18, and the tensile strength is 270-500MPa.
• D: indicates flat steel.
• ZAM: represents zinc-plated aluminum-magnesium alloy coating, which is mainly zinc-based, containing a certain proportion of aluminum (commonly 6% or 11%), magnesium (about 3%) and trace amounts of other elements.
• 275: refers to the coating weight of 275 grams/square meter (double-sided), which means that the coating content per unit area is higher and can provide better protection performance.

(1) Excellent corrosion resistance: Due to the addition of aluminum and magnesium elements, a denser and more stable protective film is formed on the surface of the strip, which greatly improves the corrosion resistance, which is several times that of ordinary galvanized strip. Especially in some harsh environments (such as high humidity, high salt, etc.), its corrosion resistance advantage is more obvious.

(2) Good incision corrosion resistance: It has a unique incision self-healing ability. At the edge after cutting or punching, magnesium and other elements in the coating will react with substances in the environment to form protective compounds to prevent rust at the incision.

(3) Good processing performance: It can adapt to a variety of processing technologies, such as bending, stamping, welding, etc. During the processing, the coating is not easy to fall off, which can ensure that the processed product still has good protective performance and appearance quality.

(4) Environmental protection: The Zn-Al-Mg alloy steel coating does not contain harmful substances such as lead and cadmium, meets environmental protection requirements, and is environmentally friendly during use and recycling.

(1) Construction industry: The Zn-Al-Mg alloy steel can be used to make building components such as keels, ceilings, porous plates, cable trays, building seismic brackets, color steel plates, etc. It can effectively resist wind and rain erosion and extend the service life of the building. At the same time, its good processing performance facilitates construction and installation.

(2) Agricultural field: It is suitable for steel structures of agricultural breeding sheds, greenhouses, etc. It can maintain stable performance in humid agricultural environments with corrosive substances (such as fertilizers, pesticides, etc.).

(3) Power communication: It is often used in the shells, brackets, communication towers, etc. of power equipment. Under complex outdoor environmental conditions, it ensures the safe and stable operation of equipment and reduces failures and maintenance costs caused by corrosion.

(4) Photovoltaic industry: It is widely used in photovoltaic brackets and rainwater gutters. In long-term outdoor use, it relies on its excellent corrosion resistance and high strength to ensure the reliable support and operation of photovoltaic equipment.

(5) Other fields: It can be used in railway road facilities, automobile parts (such as some non-critical structural parts), industrial refrigeration equipment, etc. 4. Production process

The non-cold-rolled thin plate is used as the substrate, and after pre-treatment processes such as uncoiling, welding, degreasing, annealing, etc., it enters the hot-dip plating process, immerses the substrate in the molten zinc-aluminum-magnesium alloy plating solution, so that the alloy liquid is evenly attached to the surface of the substrate to form a coating, and then goes through subsequent treatment processes such as air knife control of coating thickness, post-plating cooling, skin finishing, straightening, etc., and finally coiled into finished strip steel.

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