What alloy does high strength steel belong to?

Low alloy. High strength steel is an alloy steel, also known as high strength low alloy steel. By adding a small amount of alloying elements such as manganese, silicon, copper, nickel, chromium and molybdenum to low carbon steel, the strength and toughness of steel are improved. High strength steel has high yield strength and tensile strength, and also has good plasticity and toughness. This material is used to manufacture structural parts that need high strength and light weight, such as automobiles, aerospace, buildings, bridges and other fields. High-strength steel belongs to the category of low-alloy steel because of its low content of alloying elements, which does not exceed 5%.