MUHAMAT PURWANTO SAPUTRA, . (2026) ANALISIS PENGARUH TEMPERATURE PRE-HEATING PENGELASAN PADA MIKROSTRUKTUR DAN SIFAT MEKANIS SS 304. Skripsi thesis, Universitas Pembangunan Nasional Veteran Jakarta.
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Abstract
Piping systems play an important role in industry for fluid flow, considering that piping systems can extend for thousands of kilometers, welding is required at every joint in the piping system. This study examines the effect of variations in pre-heating temperature on the microstructure and mechanical properties of SS 304. Specimens were subjected to preheating or no preheating, then welded, followed by microstructure observation using a scanning electron microscope (SEM) and optical microscope, hardness testing on the base metal (BM), heat-affected zone (HAZ), and weld metal (WM), as well as tensile testing to determine the ultimate tensile strength (UTS). The results showed that an increase in preheating temperature caused grain size enlargement due to the annealing effect without changing the phase, where the microstructure remained in the form of austenite dendrites. The hardness value tended to decrease from the base metal to the weld metal area as the preheating temperature increased, but it became more uniform at 200°C preheating. Meanwhile, the ultimate tensile strength (UTS) value increased and reached the highest value of 624,92 MPa at 200°C preheating.
| Item Type: | Thesis (Skripsi) |
|---|---|
| Additional Information: | [No.Panggil: 2210311015] [Pembimbing: Riki Hendra Purba] [Penguji 1: Armansyah] [Penguji 2: M. Arifudin Lukmana] |
| Uncontrolled Keywords: | Welding, SS 304, Pre-heating, Microstructure, Hardness, UTS |
| Subjects: | Q Science > Q Science (General) T Technology > TJ Mechanical engineering and machinery T Technology > TS Manufactures |
| Divisions: | Fakultas Teknik > Program Studi Teknik Mesin (S1) |
| Depositing User: | MUHAMAT PURWANTO SAPUTRA |
| Date Deposited: | 28 Jan 2026 08:26 |
| Last Modified: | 28 Jan 2026 08:26 |
| URI: | http://repository.upnvj.ac.id/id/eprint/42077 |
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