What Are The Cost Advantages Of Aluminum Alloys in The Aerospace Industry?

1. Overview of Aluminum Alloy Applications in the Aerospace Industry
Aluminum alloys have a long history and wide range of applications in the aerospace field. In the aviation field, aluminum alloy can be seen in structural components such as aircraft fuselage, skin, and cabin doors, as well as key parts such as engine systems, main components, and rotating platforms. For example, in the Boeing 777 aircraft, aluminum alloy accounts for 70% of the structural mass of the fuselage; In the design of Airbus A380, aluminum alloy accounts for 78% of the total mass. In the field of aerospace, aluminum alloy also plays an important role. For example, the fuel tanks of the American Thor and Saturn II rockets use 2219 aluminum alloy, and the astronaut cabin of the space shuttle is made of aluminum. In China's Long March 1 to Long March 4 rockets, aluminum alloy accounts for more than 70% of the total structural material mass.
2. Cost Advantage Analysis of Aluminum Alloy in the Aerospace Industry
(1) Material cost advantage
Compared to other metal materials, the procurement cost of aluminum alloy has significant advantages. In the aerospace field, commonly used high-strength aluminum alloys such as 7075, 2000 series, and 7000 series have excellent performance, but their prices are still relatively low compared to materials such as titanium alloys. Taking the manufacturing of aircraft engines as an example, the main raw materials used in engines are high-temperature alloys and titanium alloys, which account for about 35% and 30% of their value respectively, while aluminum alloys have a relatively small proportion. This enables aerospace companies to save a lot of money in the raw material procurement process and reduce the initial cost of products.
(2) Manufacturing cost advantage
Excellent processing performance: Aluminum alloy has good processing performance and is easy to carry out processing techniques such as casting, forging, extrusion, and stretching. In the manufacturing process of aerospace components, this excellent processing performance can reduce processing losses and improve material utilization. For example, in the manufacturing of aircraft skins, trusses, beams and other components, aluminum alloys can accurately produce complex shapes through forming processes, reducing subsequent processing steps and thus lowering manufacturing costs.
Low processing cost: Compared with traditional aluminum alloys, some new aluminum alloys such as aluminum lithium alloys have lower processing costs. This is mainly due to its low density and high strength, which can be processed and formed at lower temperatures and pressures. For example, aluminum lithium alloy can reduce processing costs and improve production efficiency compared to other materials when manufacturing aircraft skins, truss frames, wall panels, and other components.
(3) Maintain cost advantage
Strong corrosion resistance: Aluminum alloy has good corrosion resistance, and a dense oxide film is formed on the surface, which can effectively prevent oxidation and corrosion. In the aerospace field, airplanes and spacecraft are often exposed to various harsh environments, such as oceanic climate, salt spray environments, etc. The corrosion resistance of aluminum alloy enables it to maintain good appearance and performance in these environments, reducing component damage and repair frequency caused by corrosion, thereby reducing maintenance costs.
Long service life: Due to the corrosion resistance and high strength of aluminum alloy, the service life of aerospace components is relatively long. For example, some aircraft structural components made of aluminum alloy can be used for decades without replacement under normal use, which reduces the cost of component replacement and maintenance workload.
(4) Environmental cost advantage
Aluminum alloy is a recyclable material with excellent environmental performance. After the end of the lifecycle of aerospace products, aluminum alloy components can be recycled and reused, reducing environmental pollution and resource waste. Compared with some non recyclable materials, the recycling of aluminum alloy can reduce the environmental protection costs of enterprises and also meet the requirements of sustainable development. For example, after aircraft retirement, a large number of aluminum alloy components can be recycled and reprocessed into new aluminum alloy materials for use in product manufacturing in other fields.
(5) Supply chain stability and cost control advantages
Large scale procurement reduces costs: Aerospace companies can achieve large-scale procurement by implementing the aggregation of raw material category information, accurately calculating the model, specifications, standard applications, and expected usage of each aluminum alloy material. Large scale procurement is more attractive to suppliers with a larger purchase volume, which helps companies obtain more favorable procurement conditions and reduce procurement costs. For example, a well-known domestic aircraft body structural component manufacturing enterprise has achieved large-scale procurement through accurate statistics on the demand for key aluminum alloy materials, and signed long-term agreements with high-quality suppliers, resulting in a 6% -8% reduction in procurement costs.
Optimizing supply chain management to reduce inventory costs: After entering the production and operation stage, enterprises carefully plan their production and operation plans, accurately predict and refine each procurement demand, and ensure that suppliers can strictly provide raw materials according to the models, specifications, and quantities required by customers for each delivery. This refined management strategy aims to reduce enterprise inventory backlog, accelerate turnover, and significantly reduce warehousing costs. For example, the company reduced inventory backlog by optimizing supply chain management and purchasing on demand, increased inventory turnover by 25%, and reduced warehousing costs by 15%.
Strengthening supplier cooperation to reduce costs and enhance supply chain security: By strengthening supplier cooperation, enterprises can achieve localization and localization of raw materials, which is also an important strategy for reducing costs and improving supply chain security. Taking high-performance composite materials as an example, these materials have long relied on imports, which not only result in high prices but also face the risk of supply chain disruptions. By establishing deep cooperative relationships with domestic suppliers, enterprises can jointly carry out technology research and development, and promote localized production of key materials. For example, T800 grade carbon fiber was mainly monopolized by foreign suppliers in the past, with high import prices. With the rise of domestic enterprises, localization has been achieved and the process has been further optimized in 2020. Currently, the price of domestically produced T800 grade carbon fiber has decreased by nearly 30%, with a domestic market share of over 50%. It has been successfully applied in China's aerospace products, effectively replacing imported products, reducing costs, and enhancing the autonomy and controllability of the supply chain.