The Influence of Annealing Temperature and Soaking Time on the Ductility of SG 255

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Fryad J. Mahmud Kawan M. Abdulrahman Hawkar J. Muhammed Barzan A. H. Seed

Abstract

This study deals with the effect of annealing temperature on the mechanical properties SG 255 steel. The aim of this study is to experimentally obtain better mechanical properties in particular ductility with lower annealing temperature, in order to minimize the cost of the manufacturing. In fact, this steel is used in manufacturing of domestic LPG cylinder at Halala Company in Sulaimanyah / Iraq. A number of samples were made according to ISO 6892, and then heat treated with different annealing temperature (850, 900 and 950 ℃). Furthermore, these samples were broken by tensile machine to obtain the required mechanical properties, which are compared with that of Halal factory. It was shown that higher elongation percentage with lower annealing temperature can be achieved which leads to decrease in the cost of manufacturing without degrading of cylinder quality.
Keywords: Annealing, Ductility, Gas cylinder, SG 255, Soaking time, Tensile test.

Keywords

Annealing, Ductility, Gas cylinder, SG 255, Soaking time, Tensile test.

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