Which Aluminum Alloy Can Withstand Pressure Like "Iron Man"?​

Have you ever wondered why a bicycle frame can support an adult's weight without bending? What material helps airplane wings "hold up" against strong air currents at 10,000 meters altitude? Today, we're talking about 7075 aluminum alloy, a standout among such "pressure-resistant experts".​

To put it in perspective: if ordinary aluminum were a plastic stool, 7075 aluminum would be a reinforced concrete stool. It belongs to the "tough guys" of the aluminum alloy family, getting its strength mainly from zinc — just like how people build muscle by eating more protein, zinc makes its structure denser, naturally enhancing its resistance to deformation.​

How strong is it exactly? A finger-thick rod made of 7075 aluminum can lift at least 3 family cars before breaking. What's even more impressive is that it can be "trained" — through simple processes like heating and cooling, its strength can be increased by another 30%, almost like having a built-in "reinforcement buff".​

This characteristic makes it common in daily life: mountain bike frames use it to withstand bumps without bending; hiking poles use it for being lightweight and durable; even precision components of phone frames rely on its "pressure-resistant ability".​
It turns out that those seemingly ordinary metal objects hide so many secrets — 7075 aluminum alloy proves with its strength that "being sturdy" is also a great science.