Steel has promising applications in the production of LPG cylinders. SG295 steel is used to manufacture LPG cylinders in most industries. Internal stress is a common limitation of the manufacture of LPG cylinders. The annealing heat treatment process is applied to regenerate overheated steel structures and remove internal stresses. In this article, the mechanical properties of SG295 steel in the production of LPG cylinders were characterized. For this purpose, samples were heat treated by annealing. The experiment was performed to determine the effect of annealing temperature on the mechanical properties of steel LPG cylinders, and the goal is to achieve better mechanical properties in terms of experimentally particular ductility and elongation. Furthermore, it is aimed at experimentally achieving better mechanical properties and reducing production costs at particular ductility and elongation with lower annealing temperatures. Several samples were produced according to DOT-4BA-240, heat-treated with different annealing temperatures (800 °C, 850 °C, and 900 °C). Tensile test, elongation test, and bust test were conducted to determine the annealing effect on the steel cylinder. Obtained results showed that there was a higher percentage of elongation 34.18% El was achieved at an annealing temperature of 900 °C and which also can reduce production costs without degrading the quality of the LPG cylinder.

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