EVALUATION OF 2-INCH-THICK ELECTRON-BEAM WELDMENTS.
Abstract
Sample electron-beam weldments were fabricated from 2-inch-thick 12Ni-5Cr-3Mo steel plates (at a 180 ksi yield strength) and also from 2-inch-thick 5 1/4Ni-Cr-Mo-V steel plates (at a 140 ksi yield strength) by using the lowvoltage (Sciaky) process and also using the high-voltage (Hamilton-Standard) process. Radiographic and metallographic inspections disclosed that all the weldments contained defects such as lack of penetration, lack of fusion, porosity, and/or microcracks. The results of mechanicalproperty tests of the 5 1/4Ni-Cr-Mo-V weldments indicated that, in flaw-free regions, the electron-beam weldments exhibited good strength and ductility, moderately good weldmetal toughness, and excellent heat-affected-zone toughness. The results of the mechanical-property tests of aged 12Ni5Cr-3Mo weldments indicated that, in flaw-free regions, the electron-beam weldments exhibited adequate strength but low weld-metal and weld-heat-affected-zone toughness. Generally, the evaluation of the 2-inch-thick electron-beam weldments--both the 140-ksi yield-strength 5 1/4Ni-Cr-MoV weldment and the 180-ksi yield-strength 12Ni-5Cr-3Mo weldment--indicated that no metallurgical advantages were derived from electron-beam welding that could not be achieved by using more conventional welding processes.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1964
- Accession Number
- AD0604875
Entities
People
- A. M. Rathbone
- L. P. Connor
Organizations
- U.S. Steel