The demand for high strength, good weldability, and higher resistance to atmospheric corrosion is met by a group called the high-strength low-alloy (HSLA) steels. These grades have low carbon levels (e.g., 0.05 percent) and contain small amounts of one or a combination of elements such as chromium,
nickel, molybdenum, vanadium, titanium, and niobium. HSLA steels are used for oil or gas pipelines, ships, offshore structures, and storage tanks.