Analisis Pengaruh Pengelasan SMAW Baja ST 42 dan ST 40 Dengan Perlakuan Heat Treatment Quenching Terhadap Metode Uji Tarik dan Uji Kekerasan Pada Konstruksi Hanggar Pesawat Terbang
DOI:
https://doi.org/10.54706/senastindo.v7.2025.455Keywords:
SMAW Welding, Quenching, Tensile TestAbstract
This research aims to analyze the effect of Shielded Metal Arc Welding (SMAW) using E6013 and E7018 electrodes on ST 42 and ST 40 steel that has undergone quenching heat treatment at 850°C with water as the cooling medium. Tensile test specimens were prepared according to ASTM E8 standards, while hardness testing was carried out using the Rockwell ISO 6508 method. The results show that quenching significantly improves the mechanical properties of both steels. The highest hardness value was obtained in ST 42 steel welded with E7018 electrodes after quenching, reaching 47.67 HRA, while the highest tensile strength was achieved in ST 40 steel welded with E7018 electrodes after quenching, reaching 490.107 N/mm². The comparison results indicate that the use of E7018 electrodes on ST 42 and ST 40 steel provides better performance compared to E6013, particularly after heat treatment. In conclusion, the combination of SMAW welding and quenching heat treatment effectively enhances the tensile strength and hardness of the materials, making it a valuable reference for selecting welding techniques and construction materials in aircraft hangar structures to ensure safety and structural reliability.
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