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Exhaustive series of mechanical tests leads to better understanding of the effects of previous cold work, welding and heat treatment on the tensile properties, notch toughness and the resistance to repeated loadings of two pedigreed heats of steel. Tests conducted under the auspices of the Fabrication Division, Pressure Vessel Research Committee.

In 1946 the Fabrication Division of the Pressure Vessel Research Committee instituted a research program at Lehigh University, the purpose of which was to study the effects of fabrication processes such as cold-forming and welding on the mechanical properties of steels used in the manufacture of pressure vessels. It was hoped that this program would produce information as to whether present steel specifications are adequate to provide material of the proper characteristics for use in pressure vessels.

During the past five years an exhaustive series of mechanical tests has been carried out on two pedigreed heats of steel. These tests have been directed toward a better understanding of the effects of previous cold work, welding and heat treatment on the tensile properties, the notch toughness and the resistance to repeated loading of the steels. It is the object of this report to summarize and interpret the results of the program. The viewpoint that will be taken here is that the report should attempt to answer questions such as these: Just what effect has cold work or welding on each of the mechanical properties and how important is it? How can the adverse effects be minimized or alleviated? What connection can be made between these effects and service performance? Obviously the laboratory tests cannot furnish final answers to such questions, but they can be used as evidence to support certain conclusions, even if only tentative ones.

In order to provide a sufficient background of test information, the early sections of the report contain a condensed description of the steels tested, the methods of testing and the essential data obtained. For further details on any of these, the reader is referred to previously published reports, listed under the accompanying references.

Product Details

Published: 1952 Number of Pages: 18 File Size: 1 file , 1.1 MB