Effect of Preheating Temperature Variation in GMAW Welding on the Mechanical and Metallographic Properties of S355J2 Steel in Container Flat Top Wagon 50 Feet
DOI:
https://doi.org/10.37367/jpi.v9i2.543Keywords:
S355J2 steel, Preheat, GMAW, Mechanical properties, temperatureAbstract
This research was motivated by observations of the production process of 50-foot Container Flat Top Wagons at PT INKA (Persero) prior to GMAW welding of the material, where preheating was identified as a problem. The research problem is that the uncertain preheating temperature parameters cause distortion in the material, thereby affecting its mechanical properties. The solution to this problem involves conducting research to determine the most suitable preheating temperature parameters for the Process Instruction (PI). This study aims to analyze and determine the appropriate preheating temperature for the production of 50-foot Container Flat Top Wagons at PT INKA (Persero). The research method used is a quantitative experimental method, with the research object being S355J2 steel material subjected to preheating at varying temperatures of 200-225°C, 300-325°C, and non-preheating, followed by GMAW welding. The research results indicate that preheating at 300-325°C yields the highest tensile strength and hardness values. The conclusion of this study is that increasing the preheating temperature results in increased tensile strength and hardness, as the percentage of pearlite phase increases.
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