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FAQ

Why is the hard drive made of aluminum? Why is steel not used, despite being cheaper?

The actual disks are made from an aluminum substrate. Aluminum is the best choice for minimizing the inertia of the disk pack, which reduces the energy required to spin it. A steel pack would use much more energy. Many other materials, magnets, copper, gold, oxides, diamond like coatings, insulators are inside disk drives

Aluminum coils are used in the production of automotive radiators as they provide excellent heat transfer properties. These coils are typically made from aluminum alloy, which is lightweight, corrosion-resistant, and has high thermal conductivity. The coils are formed into a specific shape and then attached to the radiator's core. As coolant flows through the coils, heat from the engine is transferred to the aluminum, which efficiently dissipates it. This helps in cooling the engine and maintaining its optimal operating temperature. Overall, aluminum coils play a crucial role in enhancing the efficiency and performance of automotive radiators.

The different thickness tolerances for aluminum coils can vary depending on the specific grade and application. However, in general, the standard thickness tolerances for aluminum coils typically range from +/- 0.002 to 0.015 inches. This means that the actual thickness of the aluminum coil can deviate within these tolerances. The specific tolerance requirements may also be influenced by factors such as the intended use of the aluminum coil and the manufacturing process involved. It is important to consult the relevant industry standards and specifications to determine the specific thickness tolerances needed for a particular application.

The typical lead time for ordering aluminum coils can vary depending on the supplier and specific requirements, but it usually ranges from a few days to a few weeks.

Why does it take less energy to get aluminum metal from used cans than to get it directly from the ore?

in order to extract the raw aluminum, you have to heat everything and melt it first, then remove the stuff that precipitates out as it cools or forms via chemical reaction with catalysts you introduce. With aluminum cans, you don't have to raise the temperature much above the melting point of aluminum, since it's already the substance in the can with the highest melting point. With aluminum ore, there can be anything in the ore with pretty much any melting point. In particular, if the ore contains an alloy of aluminum and a metal with a higher melting point than aluminum, then rest assured, you will have to raise the temperature of the ore above the melting point of aluminum in order to melt that alloy, In any case, because the maximum required temperature of the smelter needed to melt used aluminum cans is necessarily lower than the maximum temperature required to work with the ore, less energy is required to get aluminum from used cans than from ore.

Some common surface finishes for aluminum coils in the aerospace industry include anodizing, chromate conversion coating, and primer coating. Anodizing is a process that creates a protective oxide layer on the surface of the aluminum, providing enhanced corrosion resistance and durability. Chromate conversion coating, also known as chemical film coating, forms a thin layer on the aluminum surface that provides corrosion resistance and improves adhesion for subsequent coatings. Primer coating is typically applied on top of anodizing or chromate conversion coating to provide additional protection and enhance the adhesion of subsequent paint layers. These surface finishes are important in the aerospace industry as they help to protect the aluminum coils from corrosion and ensure their longevity in harsh environments.

No, aluminum coils are not suitable for electrical insulation. Aluminum is a good conductor of electricity, meaning it allows the flow of electric current rather than resisting it. In electrical systems, insulation is needed to prevent the flow of electricity and protect against short circuits or electrical shock. Materials such as rubber, plastic, or ceramic are commonly used for electrical insulation due to their high resistance to electric current.

The common transportation methods for aluminum coils include trucking, rail, and shipping. Trucking is often used for short distances or when there is a need for prompt delivery. Aluminum coils are typically loaded onto flatbed trailers or specialized coil trailers equipped with cradles or coil racks to secure them in place during transit. This method offers flexibility and allows for easy access to various locations. Rail transportation is commonly used for long-distance shipments. Aluminum coils are loaded onto railcars, which are specifically designed to accommodate the weight and dimensions of the coils. Rail transportation is advantageous for its cost-effectiveness and ability to transport large quantities of coils in a single shipment. Shipping by sea is another common method for transporting aluminum coils, especially for international shipments. Coils are typically loaded onto cargo ships in specialized containers or directly onto the ship's deck. Shipping offers the advantage of carrying large volumes of coils over long distances, and it is often the preferred method for global distribution due to its efficiency and cost-effectiveness. Overall, the transportation methods for aluminum coils depend on factors such as distance, urgency, quantity, and destination. Companies must consider these factors to determine the most suitable transportation method for their specific needs.