RAHMADIANTI, CARISSA SUCI (2025) ANALISIS KUALITAS SAMBUNGAN PENGELASAN FCAW PADA MATERIAL CARBON STEEL SS400, SM400 DAN ASTM A53. S1 thesis, Universitas Mercu Buana Jakarta.
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Abstract
This study aims to analyze the effect of varying Flux Cored Arc Welding (FCAW) parameters on the physical and mechanical properties of three structural steels: Carbon Steel SS400, SM400, and ASTM A53. Welding was performed in the 2G and 2F positions using E71T-1C flux-cored wire, with a welding current of 110–197 A and CO₂ shielding gas. The weld quality was evaluated through tensile testing, bending tests, and macrostructural observations. The tensile test results showed that SS400–SS400 joints achieved an average tensile strength of 582.5 N/mm², exceeding the SS400 standard range (400–510 N/mm²). SM400–SM400 joints reached an average tensile strength of 481.5 N/mm², higher than the minimum standard value. All bending test specimens passed the AWS D1.1 acceptance criteria, with no cracks or open discontinuities observed. Macrostructural examination revealed complete fusion between the base metal and weld metal, with no significant visible defects. In conclusion, FCAW with proper parameter settings can produce high-quality welds that meet structural application standards. SM400 exhibited stable mechanical performance, while SS400 showed a significant increase in tensile strength. These findings can serve as a reference for determining optimal welding strategies for structural steels in industrial applications. Keywords: FCAW, SS400, SM400, ASTM A53, Tensile Test, Bending Test, Macrostructure. Penelitian ini bertujuan menganalisis pengaruh variasi parameter pengelasan Flux Cored Arc Welding (FCAW) terhadap sifat fisik dan mekanik tiga jenis baja struktural, yaitu Carbon Steel SS400, SM400, dan ASTM A53. Pengelasan dilakukan pada posisi 2G dan 2F menggunakan kawat las E71T-1C, arus 110–197 A, dan gas pelindung CO₂. Evaluasi hasil dilakukan melalui uji tarik, uji bending, serta pengamatan struktur makro sambungan las. Hasil uji tarik menunjukkan bahwa pada sambungan SS400–SS400 mencapai kekuatan tarik rata-rata 582,5 N/mm², melebihi standar SS400 (400–510 N/mm²). Sambungan SM400–SM400 memperoleh nilai rata-rata 481,5 N/mm², lebih tinggi dari nilai minimum standar. Semua spesimen uji bending dinyatakan lulus sesuai kriteria AWS D1.1 karena tidak ditemukan retakan atau cacat terbuka. Pengamatan makro memperlihatkan fusi sempurna antara logam induk dan logam las tanpa cacat visual signifikan. Kesimpulannya, proses FCAW dengan parameter yang tepat mampu menghasilkan sambungan las berkualitas tinggi yang memenuhi standar kelayakan untuk aplikasi struktural. SM400 menunjukkan performa mekanik stabil, sedangkan SS400 mengalami peningkatan kekuatan tarik signifikan. Temuan ini dapat menjadi acuan penentuan strategi pengelasan optimal untuk baja struktural dalam industri. Kata kunci: FCAW, SS400, SM400, ASTM A53, Uji Tarik, Uji Bending, Struktur Makro
| Item Type: | Thesis (S1) |
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| Call Number CD: | FT/MSN. 25 093 |
| NIM/NIDN Creators: | 41322120054 |
| Uncontrolled Keywords: | FCAW, SS400, SM400, ASTM A53, Uji Tarik, Uji Bending, Struktur Makro |
| Subjects: | 600 Technology/Teknologi > 620 Engineering and Applied Operations/Ilmu Teknik dan operasi Terapan > 621 Applied Physics/Fisika terapan > 621.8 Machine Engineering, Machinery/Teknik Mesin 600 Technology/Teknologi > 660 Chemical Engineering and Related Technologies/Teknologi Kimia dan Ilmu yang Berkaitan > 661 Technology of Industrial Chemicals/Teknologi Industri Kimia 600 Technology/Teknologi > 660 Chemical Engineering and Related Technologies/Teknologi Kimia dan Ilmu yang Berkaitan > 669 Metallurgy/Metal, Metalurgi |
| Divisions: | Fakultas Teknik > Teknik Mesin |
| Depositing User: | khalimah |
| Date Deposited: | 29 Aug 2025 06:10 |
| Last Modified: | 29 Aug 2025 06:10 |
| URI: | http://repository.mercubuana.ac.id/id/eprint/97249 |
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