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<p>This study focuses on the development of a welding procedure specification (WPS) for E300BR-grade thick plates via a combination of shielded metal arc welding (SMAW) and gas metal arc welding (GMAW). A double-V groove joint design was employed, enabling SMAW from one side and GMAW from the other, which is a unique way of welding. The electrodes and filler wires were selected in accordance with ASME Section IIC: SFA 5.1 for SMAW and SFA 5.18 for GMAW. The objective was to establish a robust WPS that meets additional impact toughness requirements at subzero temperatures. Preheating and postheating parameters were followed as per ASME Section VIII, Division 1. Sound welds were achieved on both sides, with consistent layerwise heat input and no abrupt variations. Mechanical testing, covering the full weld thickness, revealed values exceeding those of the base metal. Nondestructive testing (NDT) and destructive tests confirmed satisfactory results for both welding processes. Microstructural analysis revealed the presence of Widmanstätten ferrite in the weld zone. Furthermore, bending tests revealed no open cracks, confirming that there were defect-free welds. The study successfully concludes that simultaneous WPS development for SMAW and GMAW on E300BR material ensures mechanical integrity and compliance with subzero impact performance standards.</p>

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Mechanical and Microstructural Investigations of E300BR Grade Plates Welded (Double V Grooves) via Shielded Metal Arc Welding and Gas Metal Arc Welding

  • 期刊论文

  • 发表日期：

    2025年8月30日

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  • Satish Kumar,
  • Subodh Rana,
  • Vishal Kumar

摘要

This study focuses on the development of a welding procedure specification (WPS) for E300BR-grade thick plates via a combination of shielded metal arc welding (SMAW) and gas metal arc welding (GMAW). A double-V groove joint design was employed, enabling SMAW from one side and GMAW from the other, which is a unique way of welding. The electrodes and filler wires were selected in accordance with ASME Section IIC: SFA 5.1 for SMAW and SFA 5.18 for GMAW. The objective was to establish a robust WPS that meets additional impact toughness requirements at subzero temperatures. Preheating and postheating parameters were followed as per ASME Section VIII, Division 1. Sound welds were achieved on both sides, with consistent layerwise heat input and no abrupt variations. Mechanical testing, covering the full weld thickness, revealed values exceeding those of the base metal. Nondestructive testing (NDT) and destructive tests confirmed satisfactory results for both welding processes. Microstructural analysis revealed the presence of Widmanstätten ferrite in the weld zone. Furthermore, bending tests revealed no open cracks, confirming that there were defect-free welds. The study successfully concludes that simultaneous WPS development for SMAW and GMAW on E300BR material ensures mechanical integrity and compliance with subzero impact performance standards.