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What is the difference between magnesium-aluminum alloy and aluminum-magnesium alloy?
Magnesium alloy
Magnesium alloys are alloys based on magnesium with other elements added. They are characterized by low density (approximately 1.8 g/cm³), high strength, a high elastic modulus, excellent thermal conductivity, good vibration damping, greater resistance to impact loads than aluminum alloys, and superior resistance to corrosion by organic substances and alkalis.
The principal alloying elements include aluminum, zinc, manganese, cerium, thorium, and small amounts of zirconium or cadmium. At present, magnesium–aluminum alloys are the most widely used, followed by magnesium–manganese alloys and magnesium–zinc–zirconium alloys.
It is primarily used in the aerospace, transportation, chemical, and rocket industries. Among practical metals, magnesium is the lightest: its specific gravity is about two-thirds that of aluminum and one-quarter that of iron. It boasts the lowest density of all commercially available metals while offering high strength and high stiffness.
Magnesium alloys offer a clear thermal-management advantage over other alloys. For radiators of the same volume and geometry made from magnesium alloy versus aluminum alloy, heat (or temperature) generated by a given heat source is transferred more rapidly from the base to the fin tips in magnesium-alloy radiators, resulting in higher temperatures at the fin tips.
Specifically, the temperature difference between the base and the top of a heatsink made from aluminum alloy is smaller than that of a heatsink made from magnesium alloy. This means that, for a magnesium-alloy heatsink, the temperature difference between the air at the base and the air at the top is greater than for an aluminum-alloy heatsink.
Therefore, accelerating the diffusion and convection of air inside the heat sink enhances its thermal dissipation efficiency. Consequently, at the same temperature, magnesium alloy requires less than half the cooling time of aluminum alloy.
Aluminum alloy
Aluminum alloys are the most widely used class of nonferrous metallic structural materials in industry, with extensive applications in aerospace, automotive, machinery manufacturing, shipbuilding, and the chemical industry.
The rapid development of the industrial economy has led to a growing demand for aluminum alloy welded structural components, thereby driving more in-depth research into the weldability of aluminum alloys. At present, aluminum alloys are the most widely used type of alloy.
Aluminum alloys have low density but relatively high strength, comparable to or even exceeding that of high-quality steels. They exhibit good ductility and can be readily formed into a wide variety of profiles. Additionally, they possess excellent electrical conductivity, thermal conductivity, and corrosion resistance, making them widely used in industry—second only to steel in terms of consumption.
Certain aluminum alloys can achieve excellent mechanical properties, physical properties, and corrosion resistance through heat treatment. Hard aluminum alloys belong to the Al–Cu–Mg system and typically contain small amounts of Mn; they are capable of age hardening. Their defining characteristics are high hardness but relatively poor ductility.
Ultra-hard aluminum alloys belong to the Al–Cu–Mg–Zn system, are heat-treatable for age hardening, and exhibit the highest strength among aluminum alloys at room temperature; however, they have poor corrosion resistance and undergo rapid softening at elevated temperatures.
Forged aluminum alloys are primarily Al–Zn–Mg–Si series alloys. Although they contain a wide variety of alloying elements, each is present in low concentrations, resulting in excellent hot workability and making them well suited for forging; hence the name “forged aluminum alloys.”
MG / AL
Magnesium alloy, aluminum alloy
Manufacturer—welcome to inquire.
+86-392-3658888 / 18560886088
Henan Mingmei Magnesium Technology Co., Ltd.
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Henan Mingmei Magnesium Technology Co., Ltd.
Phone:+86-392-3658888 / 3659999
Email:hnmingmei@163.com
Address: Hebi National Economic and Technological Development Zone, Henan Province
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