ASTM A656 Grade 80 is a high strength low-alloy (HSLA), hot-rolled steel. Compared to carbon steel, A656 Grade 80 has improved formability, weldability, notch toughness, and corrosion resistance. It is often chosen for structural applications where strength-to-weight ratios along with the ability to be welded and formed easily are necessary. These desirable properties are obtained through selected chemical composition and controlled mill processing. Because A656 grade 80 is stronger than mild steel, it can provide high strength in thinner sections at a lower weight. These features have made it an ideal choice in demanding structural applications such as construction equipment, crane booms, truck frames, and general fabrication
HSLA stands for high-strength low-alloy steel. It is comprised of carbon steel and small amounts of various alloying elements to alter the properties of the steel. Typically alloys are added to increase the strength of the steel, improve its ability to be formed or welded, or improve corrosion resistance. In addition to being able to provide increased strength over carbon steel, HSLA steel can also be made to have higher toughness and be more responsive to heat treatment. the various adjustments to alloying elements provide a wide range of options to find the best material for an application.