ASTM A588 Gr.A Steel for Bridge Manufacturing

In recent years, China is actively promoting the construction of ASTM A588 Gr.A steel bridges. ASTM A588 Gr.A steel is used to manufacture bridges, which can be used without painting. While meeting the requirements of energy saving and environmental protection, it greatly reduces the life-cycle cost of bridges.

ASTM A588 Gr.A steel is based on ordinary steel, adding trace alloy elements such as Cr, Ni, Cu, etc. With the increase of alloy element content, the weldability of steel decreases. The weld seam of weather-resistant bridge steel is a cast structure without subsequent heat treatment or rolling process, resulting in the mechanical properties and corrosion resistance of the joint being different from the base metal, which often becomes the weak link in the steel bridge structure.

In the manufacture of ASTM A588 Gr.A steel, according to the type and service conditions of weathering steel, select the appropriate welding material and reasonable welding process, so that the mechanical properties of the welded joint and the corrosion resistance of ASTM A588 Gr.A steel are comparable to the base metal. Matching is an important guarantee for the safety and durability of ASTM A588 Gr.A steel bridge structures.