1. Light weight: The specific strength of magnesium alloy is higher than that of aluminum alloy and steel/iron, but slightly lower than the fiber reinforced plastic with the highest specific strength; its specific stiffness is equivalent to that of aluminum alloy and steel/iron, but it is much higher than that of fiber reinforced plastic. Specific strength (strength/density ratio) and specific endurance (endurance/density ratio) are higher than aluminum and iron. Among metal structural materials, its specific gravity is the smallest (density is 2/3 of aluminum and 1/4 of steel). Under the same rigid condition, the firmness of 1kg magnesium alloy is equivalent to 18kg of aluminum or 2.1kg of steel. For the same complex parts, when magnesium alloy is used, its weight is 1/3 lighter than tin and 1/2 lighter than steel. This feature is of great significance to reduce the weight of portable products and reduce the energy consumption of vehicles in modern society.

2. High damping, shock absorption and shock absorption performance: Magnesium alloy has excellent energy absorption ability, can absorb vibration and noise, and ensure that the equipment can work quietly. This feature is very beneficial for use as an equipment casing to reduce noise transmission, improve impact resistance and prevent depression damage. The use of magnesium alloy as the structural part of the car is very beneficial to reduce the noise and vibration of the car in motion. In addition, the damping of magnesium alloy is dozens of times larger than that of aluminum alloy, and the damping effect is very significant. The base of computer hard disk made of magnesium alloy instead of aluminum alloy can greatly reduce the weight (about 70%), greatly increase the stability of hard disk, and is very conducive to the development of computer hard disk to high speed and large capacity.

3. Good impact resistance and compression resistance: its impact resistance is 20 times that of plastic. When magnesium alloy castings are impacted, the scars on their surfaces are much smaller than those of iron and aluminum. Magnesium alloy has the characteristics of absorbing elastic properties, which can produce a good combination of impact strength and compression strength, which is one of the reasons why the cover of the rotary lawn cutting machine is made of magnesium alloy die casting.

4, good casting performance: in maintaining a good component structure conditions, the wall thickness of magnesium alloy casting products can be less than 0.6mm, which is plastic products in the same strength conditions can not be achieved, and aluminum alloy products can only be in the range of 1.2~1.5mm can be comparable with magnesium products.

5. Dimensional stability: below 100 ℃, magnesium alloy can maintain its dimensional stability for a long time (in fact, almost no change in workpiece size is observed); Dimensional stability without annealing and stress relief is a very prominent characteristic of magnesium alloy. Its volume shrinkage is only 6%, which is the lowest shrinkage among cast metals. Under load, it also has good creep strength, this performance is of great significance for making engine parts and small engine die castings.

High mold productivity: Compared with aluminum alloys, magnesium alloys have a lower unit heat content, which means that they can solidify more quickly in the mold. In general, the productivity of magnesium alloy is 40% to 50% higher than that of aluminum die casting, up to 2 times that of die casting aluminum.

7. Good machining performance: The cutting resistance of magnesium alloy is small, about 1/10 of that of steel and 1/3 of that of aluminum alloy. Its cutting speed is much higher than that of other metals, and its cutting time is short. The service life of the tool is long, which is several times higher than that of other metals (very few downtime for tool change, saving operation time and tool cost); Easy to cut and low processing cost, the processing energy is only 70% of the aluminum alloy. Do not need mechanical grinding and polishing, do not use cutting fluid can also get excellent surface finish, in a cutting can be obtained, and rarely appear chip accumulation; good chip breaking characteristics and temperature conductivity, can avoid the use of coolant or lubricating fluid.

8, good corrosion resistance: in the atmosphere, magnesium has good corrosion resistance, better than the corrosion resistance of iron. For example, the corrosion resistance of high-purity magnesium alloy AZ91D is much better than that of low-carbon steel, which has exceeded that of die-casting aluminum alloy A380. In addition, beryllium and calcium in magnesium alloy can improve its corrosion resistance, while the existence of iron, cobalt, nickel, copper and silicon in magnesium alloy greatly reduces its corrosion resistance.

High heat dissipation: Magnesium alloy has high heat dissipation, which is very suitable for the production of component-intensive electronic products. The thermal conductivity of magnesium alloy is 350 to 400 times that of ABS resin. Therefore, when making electronic product shells or parts, it should give full play to the heat dissipation function and discharge the heat generated by electronic parts such as CPU in time. If only from the perspective of the heat dissipation of notebook computers and other products to consider, because the magnesium alloy heat transfer fast, and itself is not easy to burn, the use of magnesium alloy for notebook computer shell is undoubtedly the best choice.

10. Good electromagnetic disturbance barrier: magnesium alloy has better magnetic shielding performance than aluminum alloy, better blocking electromagnetic wave function, and is more suitable for making electronic products that emit electromagnetic interference. It can be used as the shell of computers, mobile phones and other products to reduce the radiation harm of electromagnetic waves to human body.

11. Low heat capacity: The heat capacity of magnesium alloy is smaller than that of aluminum alloy, so it is not easy to stick to the mold and prolong the life of the mold.

12. Recyclability: Waste magnesium alloy castings have the characteristics of being recyclable and remelted, and can be used as secondary materials for AZ91D,AM50 and AM60 for re-casting. Due to the increasing demand for die castings, the ability to recycle is very important. This environmentally desirable feature makes magnesium alloys more attractive than many plastic materials. In the environment of high environmental awareness. In the future, the impact of environmental awareness on business behavior will become greater and greater. Factors that comply with environmental regulations will inevitably overwhelm factors such as cost and function, and become the key first choice to dominate the survival of products. Therefore, the importance of highly recyclable metal products will be Increasingly highly valued. In addition, magnesium alloy also has the characteristics of fatigue resistance, non-toxicity, non-magnetic and low crack tendency, and is not easy to crack, which can be suitable for some specific fields.