Dissimilar Metal Welds Between ASTM A709 Grade 50CR and Other Bridge Steels

Details

• Creators:
  Provines, Jason T. ; Behravan, Amir ; Hossain, Md. Sojib ; Agnew, Sean R. ; Fitz-Gerald, James M. ; Sharp, Stephen R. ; Moffat, William
• Corporate Creators:
  Virginia Transportation Research Council (VTRC) ; University of Virginia
• Corporate Contributors:
  Virginia. Department of Transportation ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  50CR Steel Corrosion Corrosion Resistant Steel Dissimilar Metal Welds Fabrication Steel Steel Bridges Welding Weld Metal
• Publication/ Report Number:
  FHWA/VTRC 26-R45
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States ; Virginia
• Edition:
  Final Report
• Corporate Publisher:
  Virginia Transportation Research Council (VTRC)
• Abstract:
  Corrosion is a prevailing cause of bridge deterioration for the Virginia Department of Transportation (VDOT) and leads to expensive maintenance actions. During the past decade, ASTM A709 Grade 50CR steel has been used on bridges to provide additional corrosion resistance, although its higher material and fabrication costs present implementation challenges. Dissimilar metal welds (DMWs) using 50CR steel in targeted, highly corrosive locations can provide enhanced corrosion protection while minimizing initial costs. This project investigated the feasibility of using DMWs made between Grade 50CR and other bridge steels in terms of their weldability, mechanical properties, galvanic corrosion performance, and compatibility with standard nondestructive evaluation techniques. In addition, the project also sought to identify an alternative to 50CR steel because of challenges with its long lead time and quality in recent VDOT projects. ATI 412 steel was identified as a potential alternative to 50CR steel based on its similar corrosion resistance and mechanical properties. DMW specimens were fabricated by welding either 50CR or 412 steel to either ASTM A36 or ASTM A709 Grade 50W steel. A steel bridge fabricator conducted all welding by using a variety of welding parameters.
• Format:
  PDF
• Funding:
  120151
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:fac3eb5d13e8115f0e3350737cdbafa0b8c55dcd129e6db28c75c82e23869bd9616bd6e1edc06663cc18af8700901e2d1f95591d77d1245909d106188c3e2eac
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/92092/dot_92092_DS1.pdf
• File Type:
  [PDF - 4.03 MB ]