The specific strength of magnesium alloy is higher than that of aluminum alloy and steel, the specific stiffness is close to that of aluminum alloy and steel, and it can bear a certain load; Magnesium alloys can be widely used in automobiles.
As early as the 1930s, magnesium alloys had been formally used in the automobile industry. The oil crisis in 1970 made magnesium alloys more and more important in the automobile industry. Since the 1990s, with the rapid development of industry, the automobile industry has been required to develop in the direction of weight reduction, energy saving and environmental protection. According to calculations, every 10% reduction in vehicle weight can increase fuel efficiency by 5.5%. The car can use 70 kg of magnesium, and the annual CO2 emission can be reduced by more than 30%. Replacing magnesium alloys in some auto parts can reduce the weight of the vehicle and indirectly reduce fuel consumption.