The Use of ASTM A1010 (A709 GR50CR) Stainless Steel for Bridges in the United States

Abstract

ASTM A1010 (A709 Gr50CR) is a dual-phase stainless steel that is gaining popularity in the US bridge market due to its corrosion resistance and potential for life cycle cost savings. Several recent research studies and pilot bridge construction projects have been initiated across several different states and agencies. Recent research has primarily focused on corrosion resistance and galvanic corrosion when in contact with dissimilar metals commonly used in the steel bridge industry. Ongoing research is investigating the structural behavior of connections such as pretensioned bolted joints and welds. Six bridges have been constructed in the US using A1010 material in five different states. Several other agencies are considering or have initiated discussions on the use of this new material to reduce maintenance costs, particularly in highly corrosive environments where other common bridge materials and coating systems require costly corrosion-protection maintenance.