1. Metal materials
Fan blades:
Material selection: The Two-Speed Adjustable Portable Car Fan blades of the HF318 car fan are mainly made of aluminum alloy or high-strength steel. These materials not only have good strength and hardness, but also have good fatigue resistance, and can withstand the huge centrifugal force and air resistance generated by the fan when it rotates at high speed.
Advantages: Aluminum alloy blades have light weight and good heat dissipation performance, which helps to reduce the overall weight of the fan and improve heat dissipation efficiency. High-strength steel blades are more durable and suitable for applications that require higher air volume and air pressure.

Fan frame and safety cover:
Material selection: Fan frames and safety covers are usually made of stainless steel or high-quality alloy steel. These materials have good corrosion resistance and wear resistance, and can maintain their structural integrity and stability in harsh environments.
Advantages: Stainless steel and alloy steel frames and safety covers can effectively prevent the fan from deforming or breaking due to vibration or external force during operation, thereby ensuring the safety and reliability of the fan.

2. Other auxiliary materials
Casing and base:
Material selection: The casing and base of the HF318 car fan are usually made of high-quality engineering plastics or ABS plastics. These materials have light weight, good toughness and impact resistance, and can effectively protect the internal structure of the fan from damage.
Advantages: The engineering plastic and ABS plastic casing and base not only have beautiful appearance and comfortable touch, but also can reduce the overall weight of the fan and improve portability. In addition, these materials also have good weather resistance and chemical corrosion resistance, and can maintain their performance in various harsh environments.

Fixing screws and fasteners:
Material selection: The fixing screws and fasteners of the HF318 car fan are usually made of stainless steel or galvanized steel. These materials have good corrosion resistance and wear resistance, which can ensure that the various parts of the fan remain tight and stable after long-term use.
Advantages: Stainless steel and galvanized steel screws and fasteners not only have high strength and durability, but also can effectively prevent rust and corrosion, thereby extending the service life of the fan.