Publication Search

A pressure vessel is a closed container that stores pressurized liquids or gases. Low-carbon steel is used as a material for pressure vessels that operate at low to moderate temperatures. One of the important aspects of manufacturing pressure vessels is the welding process. The welded area tends to be the weakest point due to exposure to high heat, which can lead to greater residual stress and potentially cause cracking. This study aims to evaluate the effect of variation in ample angle and current strength on mechanical properties, especially tensile strength, and hardness, to determine the optimal amplitude angle and current strength. The research method applied is an experiment by conducting SMAW welding on SS400 steel using E7016 electrodes, with a single V ample angle variation of 55°, 60°, 65°, and strong welding current of 110 A, 120 A, and 130 A, then a tensile test and hardness test are carried out. The results show that the tensile strength of the raw material is 481.2  with a hardness of 191.95 HVN. For the variation of the amputation angle, the highest tensile strength value was recorded at an angle of 55°, which was 567.471 N/mm2 , while the lowest was at an angle of 65°, which was 559.997 N/mm2 . The highest hardness value at a 65° angle reached 328.422 HVN, while the lowest at a 55° angle was 312.878 HVN. In terms of current strength variation, the highest tensile strength is obtained at 130 A which is 568.421 N/mm2 and the lowest at 110 A is 552.339 N/mm2 . The highest hardness value is found at a current strength of 110 A, which is 343.411 HVN, and the lowest at a current strength of 130 A, which is 295.122 HVN. The optimal parameters were found at a yield angle of 55° with a tensile strength of 567.471 N/mm2 and a hardness of 312.8 HVN and a current strength of 130 A with a tensile strength of 568.421 N/mm2 and a hardness of 295.1 HVN.

In connection with the easing of the Covid 19 virus in Indonesia, the Indonesian Christian University (UKI) Engineering PKM TEAM conducted welding training offline for children with special needs. The purpose of the Service for children at the Panti Karya is to be able to provide training in welding and making trash cans easily and effectively as life skills for the children of the HEPHATA HKBP Panti Karya Foundation in North Sumatra Participants, to be able to implement cleanliness around the Hephata HKBP Panti Karya Foundation in North Sumatra as well as children who already have the skills to make trash cans from welding training can generate incoming funds for the HKBP Hephata Panti Foundation in North Sumatra. With this dedication, we can equip the children of the Karya Orphanage with life skills in making trash cans and welding to increase their competence.  

The duties and functions of a lecturer are to implement the Tri Darma of Higher Education which consists of teaching and education, research and community service. Community service is intended to participate in advancing community welfare and making the nation's life smarter. For this purpose, community empowerment is carried out through training in basic welding techniques to provide skills for people who have dropped out of school and employees who have been laid off by the Company due to being hit by the economic crisis as a consequence of the spread of Covid-19 globally and having a broad impact on various aspects of human life. The basic welding techniques training activity began with a socialization and discussion session together with educational and community leaders in Patekke Village, South Makale District. The results of the discussion are part of an analysis of situations and phenomena in society in general and for former of PT Malea Energy workers in particular. This training activity aims to provide training participants with skills and competencies so that they can work independently to activate and run the economic activities again. Training materials related to Occupational Safety and Health (K3), Industrial Materials, work facilities and equipment, and working drawings. The benefit of training is increasing HR capacity to increase productivity which is expected to improve the family's economic performance.