Accession Number : ADA953970

Title :   Welding Test 206. Physical Characteristics of Welded Longitudinal Seams. Preliminary Investigation,

Corporate Author : DAVID TAYLOR MODEL BASIN WASHINGTON DC

Personal Author(s) : Day,J. W.

Report Date : APR 1941

Pagination or Media Count : 9

Abstract : Several years ago, a series of tensile tests on medium steel plates with a longitudinal weld in the direction of loading was conducted by the Bureau of Construction and Repair at the Bureau of Standards. These tests showed that the presence of the longitudinal weld decreased the ultimate strength of the plates. The effect was attributed to the low ductility of the weld as compared to the high ductility of the plate. Since those tests were conducted the quality o the electrodes used in welding medium steel has been greatly improved. The minimum specifications for Grade EA electrodes call for a yield strength of 50,000 pounds per square inch, an ultimate tensile strength of 65,000 pounds per square inch, and an elongation of 22 per cent in 2 inches. Welding Test 206 was designed to show the effect of longitudinal seams welded with Grade EA electrodes on medium and high tensile steel plating. Preliminary to this test, five specimens were designed by the Bureau of Ships to determine whether it would be necessary to include welds of both single-vee and double-vee type. These specimens were fabricated at the Norfolk Navy Yard and shipped to the Experimental Model Basin for test.

Descriptors :   *Welds, *Metal plates, *Seam welding, *Tensile testers, Electrodes, Ductility, Steel, Tensile strength

Subject Categories : Metallurgy and Metallography
      Fabrication Metallurgy
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE