Mauludin, Thoriq Ahmad (2024) ANALISIS PENGARUH SAMBUNGAN SMAW ROOT GAP 2 MM PADA BAJA KOMERSIAL DENGAN VARIASI KUAT ARUS DAN JENIS DIAMETER ELEKTRODA TERHADAP SIFAT MEKANIK. Undergraduate thesis, Universitas 17 Agustus 1945 Surabaya.
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Abstract
Baja komersial adalah baja karbon rendah meskipun baja ringan memiliki kekuatan tarik yang relatif rendah dibandingkan baja industri, baja ini murah dan mudah dibentuk serta kekerasan permukaan dapat ditingkatkan melalui perlakuan panas. Meskipun kisarannya bervariasi, baja ringan biasanya mengandung sekitar 0,05% hingga 0,25% berat karbon, sedangkan baja karbon tinggi biasanya memiliki kandungan karbon antara 0,30% dan 2,0%. Penggunaan baja dalam industri perkapalan dan kelautan seringkali membutuhkan ketahanan dan keandalan yang tinggi terhadap lingkungan yang keras, termasuk paparan terhadap air laut. Baja komersial adalah salah satu pilihan yang populer karena mudah didapat dan murah. Namun, pengelasan baja komersial untuk aplikasi kelautan tidak selalu langsung, ini terutama benar dalam kasus pengelasan arus baja terlindung SMAW. Pada penelitian ini kita akan menggunakan pengelasan dengan jenis SMAW (Shield Metal Arc Welding) dengan media baja komersial. Pengelasan tersebut menggunakan root gap 2 mm dengan menggunakan jenis elektroda NK-68 E6013 dengan variasi diameter 2 mm, 2,6 mm, dan 3,2 mm serta variasi kuat arus yang digunakan ialah 90 A, 100 A, dan 110 A. dalam spesimen ini kita menggunakan 2 pengujian yaitu uji kekerasan dan uji tarik. Penelitian ini bertujuan untuk menganalisis nilai dari uji kekerasan dan uji kekerasan dari baja komersial setelah dilakukan penyambungan pengelasan SMAW (Shield Metal Arc Welding). Hasil pengujian kekerasan pada plat baja komersial variasi kuat arus dan diameter elektroda dengan metode pengelasan SMAW (Shield Metal Arc Welding) menggunakan pengujian kekerasan rockwell skala B, di dapatkan nilai tertinggi terdapat pada diameter elektroda 2 mm pada variasi kuat arus 100 A nilai kekerasan maksimum dengan nilai 94,5 HRB. Nilai terendah pada diameter elektroda 3,2 mm variasi kuat arus 100 A dengan nilai minimum 89 HRB. Berdasarkan hasil pengujian kekuatan tarik penggunaan variasi diameter elektroda dan besar arus pada proses pengelasan memiliki dampak pada nilai kekuatan tarik material. Pada elektroda 2 mm dengan arus 100 A memiliki tegangan tertinggi yaitu 32,66 kg/
| Item Type: | Thesis (Undergraduate) |
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| Uncontrolled Keywords: | Baja Komersial, Diameter Elektroda, Kuat Arus, Pengelasan Smaw, Sifat Mekanik |
| Subjects: | T Technology > TJ Mechanical engineering and machinery |
| Divisions: | Fakultas Teknik > Program Studi Teknik Mesin |
| Depositing User: | 1422000170 Thoriq Ahmad Mauludin |
| Date Deposited: | 18 Jun 2026 07:45 |
| Last Modified: | 18 Jun 2026 07:45 |
| URI: | http://repository.untag-sby.ac.id/id/eprint/34017 |
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