The Federal Highway Administration (FHWA) sponsored a number of research and development (R&D) programs to improve electroslag welding (ESW) technology in the 1980s. As a result of this research, a new Narrow-Gap Improved Electroslag Welding (NGI ESW) process was developed by the Oregon Graduate Institute of Science and Technology (OGI) in Beaverton, Oregon. The results of the OGI research are described in FHWA Report No. FHWA-RD-87-026, "Improved Fracture Toughness and Fatigue Characteristics of Electroslag Welds", published in October 1987. This process operational guide is prepared for welders, operators, inspectors, and supervisors involved in fabrication of bridge components using NGI ESW. The document contains technical information needed for understanding and using the NGI ESW procedure and is based on FHWA Report No. FHWA-RD-87-026, other FHWA and OGI reports, and best industrial ESW practice. The document provides descriptions of standard and NGI ESW processes, and discusses the role of welding variables, the main factors affecting cost of ESW, residual stresses and distortion, imperfections and their causes, inspection and nondestructive test methods, repair, and safety in NGI ESW. The document is designed to benefit not only state departments of transportation and steel bridge fabricators, but also inspection agencies, manufacturers of welding consumables and equipment, steel mills, and other heavy fabricators.

  • Corporate Authors:

    Northwestern University, Evanston

    Basic Industrial Research Laboratory, 1801 Maple Street
    Evanston, IL  United States  60201-3135

    Federal Highway Administration

    Office of Technology Applications, 1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Malin, V
  • Publication Date: 1996-2-1


  • English

Media Info

  • Pagination: 113 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00725587
  • Record Type: Publication
  • Report/Paper Numbers: FHWA-SA-96-053, Final Report, A420-C2
  • Contract Numbers: DTFH61-93-C-00104
  • Files: TRIS, USDOT
  • Created Date: Sep 17 1996 12:00AM