Charpy Impact Energy Values for Submerged Arc Welding of ASTM A709 50CR (UNS S41003) using Austenitic Welding Wires

ASTM A709 Grade 50CR is a bridge steel designed to address the issue of prolonged wetness combined with chlorine containing salts which hinders the formation of a passive layer on traditional weathering steels. Due to the limited amount of information on the welding parameters for 50CR, this study investigated the effects of using 4 different welding filler wires (ER309L, ER309LC, ER309LSi, and ER316L) in conjunction with a specific heat input (75 kJ/in) and maximum interpass temperature (450 °F) on half-inch groove welded plates, selected from a larger set. This study reports the absorbed fracture energies obtained with Charpy V-notch testing on full size samples performed at a range of temperatures, including those specified by ASTM and AWS standards for zone 2. The ductile to brittle transition temperature (DBTT) of 50CR was found to be -40 °F, a thirty degree improvement from conventional weathering steel, 50W. The only sample plate that failed to meet AWS D1.5 in this study was welded with 309L, a heat input of 75 kJ/in, and a maximum interpass temperature of 450 °F, with an average fracture energy of 17 ft-lbs. The sample plate welded with 309LC showed a high amount of ductility across all Charpy test temperatures, and an average fracture energy of 41 ft-lbs at the AWS D1.5 testing temperature. Microstructure and fracture analysis were performed using conventional optical and scanning electron microscopy.

• Supplemental Notes:
  • This paper was sponsored by TRB committee AFH70 Standing Committee on Fabrication and Inspection of Metal Structures.
• Corporate Authors:

  Transportation Research Board

  ,    
• Authors:
  • Xia, Xuemeng
  • Dubas, Robert M
  • Fitz-Gerald, James M
  • Agnew, Sean R
  • Sharp, Stephen R
  • Provines, Jason
• Conference:
  • Transportation Research Board 98th Annual Meeting
  • Location: Washington DC, United States
  • Date: 2019-1-13 to 2019-1-17
• Date: 2019

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: 5p

Subject/Index Terms

• TRT Terms: Steel bridges; Steel plates; Structural steel; Submerged arc welding; Temperature
• Subject Areas: Bridges and other structures; Energy; Materials;

Filing Info

• Accession Number: 01697825
• Record Type: Publication
• Report/Paper Numbers: 19-02733
• Files: TRIS, TRB, ATRI
• Created Date: Mar 1 2019 3:51PM