Choosing the Right Alloy Sheet for Your Project

Choosing the Right Alloy Sheet for Your Project

Whether you’re building a spaceship or buttressing a bridge, choosing the right alloy is essential. Different aluminum sheet metal grades have unique characteristics that impact their performance capabilities.

In one example, rolling followed by flash annealing produced a sheet with high strength and ductility. The microstructure, characterized by electron backscatter diffraction (EBSD) inverse pole figures, has a fine grain structure with low texture.

Corrosion Resistance

The ability to resist corrosion is an essential property for materials used in corrosive environments. In addition to the chemical composition of a material, other important factors that influence corrosion include temperature and humidity, the presence of corrosive substances, and mechanical stress.

Corrosion resistance is generally defined as the ability of a metal to avoid environmental degradation without significant mass loss, Alloy Sheet pitting, crevice corrosion, or localized stress corrosion cracking. Metallurgical properties such as high specific gravity and good machinability contribute to the corrosion-resistant nature of alloys.

Stainless steels, for example, have a natural ability to resist degradation in corrosive environments due to their chromium content. Additionally, certain surface treatments can help slow the rate of corrosion in corrosive environments. These surfaces are often referred to as passivated.

However, even the best materials will corrode when their natural corrosion-resisting properties are impaired by mechanical or chemical means. For example, in some situations the formation of the oxide film on the surface can be disrupted by low concentrations of oxygen or high concentrations of species that compete with chromium to form an oxide layer (such as chloride and carbonates).

Other factors that affect corrosion-resistant metals include the degree to which the reaction is favored by a more active constituent in the alloy – for example, by a higher proportion of nickel and lower proportion of chromium – or the response to the combined action of multiple corrosion sources. Duplex metals combine the desirable characteristics of ferritic and austenitic alloys to offer advanced corrosion-resistant properties.


Aluminum is an ideal choice for projects that require a high strength-to-weight ratio. It is also extremely corrosion-resistant, which makes it a popular choice for marine applications and areas that are exposed to moisture. There are many different alloys that are used to manufacture aluminium sheet metal, and the best one for your project will depend on what it needs to do. The alloys are categorized according to their properties and given a four-digit number, with the first digit representing the main alloying element. For example, alloy 1100 is commercially pure aluminum with good workability and corrosion resistance but low strength. It is often clad with stronger aluminium alloys like 3xxx and 4xxx, which provides the additional strength required for certain applications.

The 52.551 h22 aluminium alloy is the most common type of alloy used for sheet metal because it offers superior strength and corrosion resistance. This is especially important for outdoor applications and areas that are exposed to harsh weather conditions. Aluminium alloys are also known for their weldability, which means they can be easily welded together to create strong and durable structures.

Alloy sheet metal isn’t invincible, however, and its lifespan can be impacted by a number of factors. Exposure to galvanized steel manufacturer saltwater, high humidity levels or acidic or alkaline substances can all damage the oxide layer and expose the underlying aluminium material. Regular cleaning can help to extend the lifespan of your aluminium sheets.


Aluminum alloys are exceptionally lightweight, making them ideal for applications where weight is a crucial factor. They also offer outstanding durability, corrosion resistance, and thermal and electrical conductivity. But not all alloys are created equal. The performance capabilities of different aluminum alloys vary depending on the thickness, temper, and other factors. It’s important to know how your project will be used so you can select an alloy that will meet or exceed your expectations.

When choosing an alloy for your application, you should consider the elongation and tensile strength of the material, as well as its plasticity, corrosion resistance, weldability, and machinability. The elongation and tensile strengths of different alloys are calculated using the ASTM designation system. To make the selection process easier, you can use the ASTM designation table to compare the tensile and elongation strengths of different alloys.

Alloys can be further classified by their alloying components and by their thermomechanical treatment during production. Wrought alloys are typically identified by a four-digit code with the first digit designating the group and the other digits indicating the specific alloying elements. To improve the formability and weldability of wrought alloys, they can be cold worked to a semi-cold hardening state. These alloys are suitable for spot welding, atomic hydrogen welding, gas welding, and arc welding. UACJ offers high-strength GM55-H38 aluminium alloy sheets for use with mobile devices like smartphones and notebook PCs. These alloys are an excellent alternative to stainless steel frames and provide the added benefit of being nonmagnetic.


If you need your parts to have a polished, smooth finish, look for alloys that can handle that. The same is true for mechanical properties–a softer metal may require more lubrication or lower application pressures than a stiffer one to work with.

Xometry offers a variety of finishing processes that can be applied to flat sheet cut parts to improve their cosmetic appearance. This is important for parts that are visible, handled, or need to be installed or removed frequently. As with any manufacturing process, standard finishes from a waterjet or laser cutter can leave behind some minor imperfections on the surface of the part. This includes frosting near the cut line, marks from handling, and pierce points.

The Xometry team is happy to work with you to find an appropriate finish for your project. Some options include powder coating, which can be done with a wide range of colors. Another option is anodizing, which provides a passivating oxide film on aluminum parts’ surfaces and can be colored to match your project’s design. It also offers corrosion resistance, improved braking forming characteristics, and fade-resistant qualities.

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