E709

E709 is a designation that can refer to several different entities, most notably a specific type of steel alloy and a highway route in various regions.

As a steel alloy, E709 is a classification used within the American Society for Testing and Materials (ASTM) standards. This designation typically refers to a low-alloy steel intended for use in structural applications, often characterized by its good weldability and moderate strength. The 'E' prefix signifies that it is an electrode or wire for welding, and the '70' indicates a minimum tensile strength of 70,000 pounds per square inch. The subsequent numbers, such as '9', often relate to the specific composition and alloying elements present, influencing properties like toughness and ductility. This type of steel is commonly employed in construction, shipbuilding, and the fabrication of heavy machinery.

In terms of highway designations, E709 appears as a route number in at least two distinct locations. In Germany, Bundesautobahn 709 (BAB 709) is a short autobahn ring road in the city of Nuremberg, Bavaria. It serves to bypass the city center and connect various radial motorways. In the United States, State Route E709 is a designation found in rural areas, often indicating a smaller, non-interstate highway managed by state or county authorities. The exact location and function of such a route would depend on the specific state or region where it is designated.