ASTM A709-50W is a standard specification for structural steel in bridges. ASTM A709-50W covers high strength, low allow steel structural shapes, plates and bars. The atmospheric corrosion resistance of this steel in most environments is substantially better than carbon steel with or without copper addition.
ASTM A572-50 | a572-50 Steel - Central Steel Service
ASTM A572-50. ASTM A572-50 is a high strength low-alloy columbium-vanadium structural steel. This specification provides for a 50ksi minimum yield strength and 65ksi minimum tensile strength.Channel, Round & Squares · Weathering Steel Plate · Contact · Cor-Ten