Pengaruh Pre-Heat dan Interpass Temperature terhadap Kekuatan Tarik Sambungan Demand Critical Weld

Abstract

Welding of High Strength Low Alloy (HSLA) steel requires special attention to parameters such as interpass temperature and preheat. This study evaluates the effect of variations in interpass temperature (200°C and 300°C) and preheat (100°C and 200°C) on the tensile strength of welded joints in ASTM Grade 50 material with a thickness of 25 mm, using the Flux-Cored Arc Welding (FCAW) process. The purpose of the study was to determine the most effective temperature and to test whether the joints meet client specifications without interpass temperature. Tests were conducted with All Weld Tension according to AWS D1.8 standard. The test results showed that the tensile strength of the test specimens at all interpass temperature variations met the AWS D1.8 acceptance criteria, which is above 490 MPa. The results of this study revealed that the 200°C preheat and 300°C interpass temperature variation had the highest tensile strength value, namely 579.73 MPa. It can be concluded that the interpass temperature does not have a significant impact on the value of all weld tension