Which type of steel is known for being stronger than mild steel due to the addition of alloys?

High-strength, low-alloy (HSLA) steel is recognized for its enhanced strength compared to mild steel, largely due to the deliberate addition of various alloying elements. These elements, which may include copper, nickel, and chromium, improve the mechanical properties of the steel, making it not only stronger but also more resistant to corrosion and wear.

One of the primary advantages of HSLA steels is that they maintain a relatively low carbon content, which helps in sustaining good ductility and weldability while still delivering strength that surpasses that of standard mild steel. This balance of properties makes HSLA steel suitable for applications in structures and components where both strength and durability are critical, such as in bridges, buildings, and automotive parts.

In contrast, other types of steel mentioned, such as mild steel, do not contain these additional alloys, resulting in lower overall strength. High alloy steel, while also strong, often contains a higher percentage of alloying agents and is typically designed for specific applications that may not prioritize low weight and high strength together. Meanwhile, carbon steel generally falls between mild steel and alloy steels but does not possess the same level of enhancement provided by the low-alloy additions found in HSLA steel, which specifically targets improved performance under stress.