Yes, aluminum is a metal. It sits firmly in the metal category on the periodic table, conducts electricity and heat, reflects light, and behaves like a metal in every way that counts. But the more interesting question isn’t whether aluminum is a metal. It’s what kind of metal it is, because aluminum’s particular set of properties is unusual enough that it took chemists until the 1800s to isolate it, and unusual enough that it now shows up in everything from soda cans to spacecraft.
Here’s what makes aluminum a metal, what kind of metal it is, and why those properties matter so much in real-world fabrication and manufacturing.
What Makes Aluminum a Metal
A material earns the label “metal” by showing a specific set of behaviors, and aluminum checks every box.
It conducts electricity. Aluminum is an excellent electrical conductor, good enough that it’s used in power transmission lines around the world where its light weight gives it an edge over copper.
It conducts heat. Aluminum moves heat extremely well, which is exactly why it’s the standard material for heat sinks, cookware, and radiators.
It’s malleable and ductile. Aluminum can be rolled into foil thinner than paper, drawn into wire, and extruded into complex shapes, all hallmarks of metallic behavior.
It has metallic luster. Freshly cut or polished aluminum has the bright, reflective shine we associate with metals.
It forms metallic bonds. At the atomic level, aluminum atoms share their outer electrons in the “sea of electrons” that defines a metal and gives metals their conductivity and workability.
By every one of these measures, aluminum is unambiguously a metal. The question has a simple answer. It’s the details that get interesting.
What Kind of Metal Aluminum Is
Not all metals are the same, and aluminum belongs to a specific category that explains a lot about how it behaves.
Aluminum is a post-transition metal, sitting in that group on the periodic table alongside metals like tin and lead. It’s also classified as a light metal because of its low density, and as a non-ferrous metal because it contains no iron, which is the reason it doesn’t rust the way iron and steel do.
It carries the chemical symbol Al and the atomic number 13. It’s the most abundant metal in the Earth’s crust and the third most abundant element overall, after oxygen and silicon. Despite that abundance, pure aluminum almost never occurs in nature, because it bonds so readily with oxygen that it’s always locked up in compounds like bauxite ore. Freeing it from those compounds is energy-intensive, which is why aluminum was once considered a precious metal more valuable than gold, before industrial processes made it affordable.
The Properties That Make Aluminum So Useful
Knowing aluminum is a metal is the start. Understanding which metallic properties it has in abundance is what explains its place in modern industry.
It’s remarkably light. Aluminum is about one-third the density of steel, which is the single property that makes it indispensable in aircraft, vehicles, and anything that needs to be strong without being heavy.
It resists corrosion on its own. This is aluminum’s most distinctive trick. The moment its surface meets air, it forms a thin, tough oxide layer that seals the metal underneath and protects it from further corrosion. Scratch it and a new layer forms instantly. This self-protection is why aluminum survives outdoors for decades without rusting.
It’s strong when alloyed. Pure aluminum is fairly soft, but mixing it with small amounts of elements like magnesium, silicon, and copper produces alloys with strength rivaling structural steel at a fraction of the weight.
It’s endlessly recyclable. Aluminum can be melted down and reused repeatedly without losing its properties, using a small fraction of the energy needed to produce it from ore.
It’s non-toxic and non-magnetic. These properties make it safe for food contact and useful in applications where magnetic materials would cause problems.
This combination, light weight, self-protection, alloyed strength, and recyclability, is what makes aluminum one of the most useful metals ever put to work.
How a Metal Becomes a Usable Product
Being a metal with great properties is only the beginning. Turning raw aluminum into something useful takes processing, and the most versatile of those processes is extrusion.
Extrusion takes aluminum, heats it until it’s soft but still solid, and forces it through a shaped die under enormous pressure. The metal flows through the die opening and emerges as a continuous profile with that exact cross-section, whether that’s a simple bar, a hollow tube, an angle, a channel, or a complex custom shape with integrated features.
This is where aluminum’s metallic properties pay off all at once. Its workability lets it flow cleanly through the die. Its strength-when-alloyed means the finished profile carries real loads. Its corrosion resistance means the profile lasts. And its ability to take anodizing and powder coating means it can be finished beautifully. The metal that chemists struggled to isolate two centuries ago is now shaped into precise profiles by the kilometre, every day, in factories around the world.
How This Connects to Exalum
Exalum works with aluminum’s metallic properties for a living, turning the raw metal into the extruded profiles that fabricators and manufacturers build with. The 20,000 m² vertically integrated facility in Indonesia controls the metal from alloy preparation through extrusion and finishing, which is what makes the properties of the finished profile, its strength, its corrosion resistance, its finish, reliable and consistent.
The product range puts aluminum’s metallic advantages to work across applications:
- Square Hollow and Rectangular Hollow that use aluminum’s strength-to-weight for structural framing
- Equal Angle, Unequal Angle, and Unequal Channel for bracing and connections that resist corrosion naturally
- Flat Bars and Round Bars for machined components and structural connections
- Tubing Pipes for railings, frames, and fluid handling
- Heat Sinks that exploit aluminum’s exceptional thermal conductivity, one of its most metallic properties
- Curtain Wall, Casement Windows, Doors, and Sliding Doors for architectural work where the metal’s finish and weight matter
- Conveyor, Automotive, and Furniture profiles across the industries that depend on aluminum
Each of these is a way of taking aluminum, a remarkable metal, and shaping its properties into something a project can actually use.
From Element to Engineering
So yes, aluminum is a metal, and a genuinely exceptional one. Light, self-protecting, strong when alloyed, endlessly recyclable, and abundant, it brings together a set of properties that few other metals can match. Understanding those properties is the first step. Putting them to work through precise extrusion, in the right alloy and temper for the job, is what turns the element into engineering.
Exalum Metal has supplied extruded aluminum to fabricators, builders, and manufacturers since 2009, with the vertical control that makes the metal’s properties reliable in every finished profile.
Whether you need standard profiles or custom cross-sections designed for your specific requirements, Exalum Metal has the capacity and expertise to deliver.
Ready to discuss your project or request material specifications? Get in touch with the Exalum Metal team directly:
Email: [email protected] WhatsApp: +62 811 9429 970 Website: www.exalummetal.com
When you put this remarkable metal to work, start with extrusion you can trust. Make Exalum Metal your standard.
