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Journal of Welding Technology
Published by Politeknik Negeri Lhokseumawe
ISSN : 27161471     EISSN : 27160475     DOI : -
Core Subject : Science, Engineering,
Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
The main scope of the journal is to publish original research articles in the area of Welding Technology The main focus of the journal is on experimental research. The scope of the journal includes;
Arjuna Subject : Ilmu Material (semua kategori) - Ilmu Material (Lain-Lain)
Articles 77 Documents
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Analysis of weld defects and corrosion rates in SS304–SS400 dissimilar joints under various MIG welding positions Yoggo Bagus Pamungkas; Nani Mulyaningsih; Sri Hastuti; R.Faiz Listyanda
Journal of Welding Technology Vol 8, No 1 (2026): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v8i1.8788

Abstract

The combination of SS304 stainless steel and SS400 low-carbon steel is widely used in the automotive and construction sectors because it combines weldability with good corrosion resistance. However, the differences in the physical and mechanical properties of these two materials have the potential to affect the quality of the welded joint, especially when considering variations in welding position. This study aims to analyze the effect of 1G, 2G, and 3G welding positions on welding defects and the corrosion rate of Metal Inert Gas (MIG) welded joints. The materials used were SS304 stainless steel plates and SS400 lowcarbon steel plates joined using a 60° V-groove. The welding process was performed using a current of 70 A as the primary parameter and ER309L electrode wire for all welding position variations. Welding defect testing was performed using the liquid penetrant method in accordance with ASTM E165 to detect surface defects, and corrosion rate testing was conducted using the electrochemical method in a NaCl solution, referencing ASTM G102 to determine the corrosion resistance of the welded joints. The test results showed that the 1G welding position produced the fewest welding defects compared to the 2G and 3G positions, and the 1G welding position yielded the lowest corrosion rate of 0.0789 mmpy, while the 2G and 3G positions showed corrosion rates of 0.1301 mmpy and 0.1699 mmpy, respectively. These values indicate that welded joints in the 1G position have better corrosion resistance compared to other positions. This difference is influenced by the stability of the weld pool, the effect of gravity, and the lower likelihood of weld defects in the 1G position. Thus, the welding position plays a crucial role in determining the quality and corrosion resistance of MIG weld joints in dissimilar materials, specifically SS304 stainless steel and carbon steel. SS400 low-carbon steel.
Safety and hazards during welding process-A review Arman Malik
Journal of Welding Technology Vol 8, No 1 (2026): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v8i1.9174

Abstract

The basic objective of this review paper is to understand and highlight the safety aspects and various hazards during the welding process, and to raise awareness of these hazards so we can avoid them. The welding process is extensively used in various industries such as the petrochemical, chemical industries, automobile, and manufacturing industries. It is widely used process all over the world but as it is widely used and important process, it causes hazards too for the workers. However, the very energy density required to fuse metals introduces significant occupational safety and health (OSH) hazards. This review paper systematically examines the multifaceted risks inherent in the welding environment.  Hazard generated during the welding process is risky to human life, knowledge of occupational safety is while working in this field is must
The effect of welding speed variations on stainless steel – carbon steel fillet joints with the tig welding method on the quality of the welded joint Ahmad Naufal Syafiandika; Febri Budi Darsono; Muhammad Adi Inanto; Bayu Agung Nugroho; Muchamad Arya Ramadhan Nur Imam
Journal of Welding Technology Vol 8, No 1 (2026): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v8i1.9268

Abstract

Dissimilar welding between stainless steel and carbon steel is widely applied in industries such as power plants, petrochemical facilities, pressure vessels, and heat exchangers due to its ability to combine the advantages of both materials; however, studies investigating the effect of welding speed on TIG-welded fillet joints between ASTM A36 carbon steel and SS316 stainless steel remain limited, particularly regarding weld quality evaluation through non-destructive and destructive testing. This study aims to determine the effect of welding speed on the quality of TIG-welded fillet joints of ASTM A36 carbon steel and SS316 stainless steel. The welding process was performed using the Gas Tungsten Arc Welding (GTAW/TIG) method with ER309L filler metal and welding speed variations of 83, 86, and 93 mm/min in the 1F fillet position. Weld quality was evaluated through dye penetrant testing, radiography testing, and macrostructure examination to assess weld defects, fusion quality, and penetration characteristics. The results of dye penetrant testing indicated that specimens welded at 93 and 86 mm/min were free from surface defects, while the specimen welded at 83 mm/min exhibited a minor porosity defect of 0.5 mm. Radiography testing showed no internal defects, such as cracks, slag inclusions, lack of fusion, or lack of penetration, in all specimens. Macrostructural observations confirmed sound fusion between ASTM A36 and SS316 materials and revealed that welding speed significantly affected weld penetration. The deepest penetration was obtained at the lowest welding speed of 83 mm/min, reaching 1.25 mm, while penetration decreased with increasing welding speed. It can be concluded that all welding speed variations produced acceptable weld quality; however, a welding speed of 83 mm/min provided the best penetration performance due to higher heat input during the welding process.
Mechanical degradation of TIG-welded copper joints after long-term demineralized water exposure Azwinur Azwinur; Adi Saputra Ismy; Surya Dharma; Abdillah Firmansyah
Journal of Welding Technology Vol 8, No 1 (2026): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v8i1.9580

Abstract

Tembaga merupakan material yang banyak digunakan pada komponen perpindahan panas karena memiliki konduktivitas termal yang tinggi. Kualitas sambungan las menjadi faktor penting dalam menjamin keandalan komponen selama masa operasi, terutama setelah terpapar lingkungan kerja dalam jangka panjang. Penelitian ini bertujuan menganalisis pengaruh variasi arus pengelasan Tungsten Inert Gas (TIG) terhadap kekuatan tarik sambungan Cu–Cu setelah perendaman dalam air demineral selama enam bulan. Material yang digunakan berupa pelat tembaga dengan ketebalan 2,7 mm yang disambung menggunakan proses GTAW/TIG dengan variasi arus 120 A, 135 A, dan 150 A. Setelah proses pengelasan, seluruh spesimen direndam dalam air demineral selama enam bulan, kemudian dilakukan pengujian tarik sesuai standar ASTM E8/E8M menggunakan Universal Testing Machine (UTM). Parameter yang dianalisis meliputi kekuatan tarik maksimum (ultimate tensile strength) dan displacement saat patah. Hasil penelitian menunjukkan bahwa variasi arus pengelasan memengaruhi performa mekanik sambungan. Arus 120 A menghasilkan kekuatan tarik tertinggi sebesar 217,542 MPa dengan displacement sebesar 31 mm, sedangkan arus 135 A menghasilkan kekuatan tarik terendah sebesar 212,521 MPa. Pada arus 150 A, kekuatan tarik meningkat kembali menjadi 216,438 MPa, namun displacement menurun menjadi 28 mm. Hasil tersebut menunjukkan bahwa arus 120 A memberikan kombinasi terbaik antara kekuatan tarik dan kemampuan deformasi setelah sambungan mengalami perendaman dalam air demineral selama enam bulan. Temuan ini menunjukkan bahwa pemilihan parameter arus pengelasan berperan penting dalam mempertahankan performa mekanik sambungan tembaga pada aplikasi sistem perpindahan panas dan pendinginan.
Numerical framework for multi-pass SMAW pre-WPS development on SA-36 low carbon steel Regan Rahadian Pambudi; Ayende Ayende
Journal of Welding Technology Vol 8, No 1 (2026): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v8i1.9252

Abstract

Multi-pass SMAW on low carbon steel demands precise parameter control to ensure joint integrity and qualification compliance. Trial-and-error WPS development is material-intensive and time-consuming, particularly where heat input management across passes is critical. This study proposes a numerical framework combining Carbon Equivalent (CET) analysis, Rosenthal 2D thermal modeling via MATLAB with SmartWeld suite, and thermo-mechanical FEA to determine preliminary welding parameters prior to experimental qualification. Parameters are validated on SA-36 plate using a 4-pass SMAW procedure qualified under ASME BPVC Section IX, with NDT per ASME BPVC Section V. Tensile strengths of 530.90 MPa and 503.99 MPa exceed the 400 MPa minimum, all bend specimens pass without rejectable discontinuities, and FEA deformation prediction of 1.59 mm against a measured 2.01 mm demonstrates conservative predictive capability suitable for preliminary parameter screening. Unlike conventional trial-and-error qualification, this framework integrates three analytical methods into a structured pre-screening workflow, reducing material consumption and qualification iterations prior to experimental testing.
Comparison of electrode diameter-based and heat input-based methods for estimating the number of weld passes in shielded metal arc welding (SMAW) Susilo Handoko; Regan Rahadian Pambudi
Journal of Welding Technology Vol 8, No 1 (2026): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v8i1.9616

Abstract

Selecting the appropriate number of weld passes is an important step in Shielded Metal Arc Welding (SMAW) because it influences weld quality, heat input, productivity, and metallurgical characteristics of the welded joint. Existing approaches, such as the heat input-based procedure proposed by Trindade, provide reliable estimates by considering welding heat input and allowable thermal limits but require detailed welding parameters that are often unavailable during the initial stage of welding procedure planning or impractical to calculate on the production floor. This study proposes a simplified empirical equation for estimating the required number of SMAW weld passes using only plate thickness and the smallest electrode diameter. The proposed equation was evaluated by comparison with a modified heat input-based procedure derived from Trindade and integrated with EN 1011-2:2001 through Carbon Equivalent (CET) assessment. The comparison was conducted for single V-groove butt joints in the 1G position using a 2.6 mm E7016 electrode on plate thicknesses of 5, 8, 10, 12, and 16 mm. The proposed method predicted 2, 4, 4, 5, and 7 weld passes, whereas the modified heat input method required 2, 4, 6, 8, and 15 passes, respectively. Both methods produced identical results for plate thicknesses up to 8 mm; however, the discrepancy increased for thicker plates because the proposed equation does not account for groove geometry, welding travel speed, deposition rate, or heat input. The results demonstrate that the proposed equation provides a rapid and practical preliminary estimation tool for low-thickness SMAW joints, enabling fabrication personnel to estimate the required number of weld passes within seconds using only readily available parameters before detailed heat input verification is performed.
Comparative finite element analysis of IIW linear stress extrapolation and haibach methods for structural hot-spot stress prediction in welded plate joints Regan Rahadian Pambudi; Richard Alexander
Journal of Welding Technology Vol 8, No 1 (2026): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jowt.v8i1.9504

Abstract

Accurate prediction of structural hot-spot stress (SHSS) is essential for evaluating welded joints. This study compares the International Institute of Welding (IIW) Linear Stress Extrapolation (LSE) and Haibach methods using finite element analysis performed with the open-source software CalculiX. Three weld geometry representations (no weld, chamfer, and fillet) and two mesh densities (fine and coarse) were investigated, resulting in six finite element models. Both SHSS methods were applied to evaluate stress prediction, mesh sensitivity, weld geometry effects, and computational performance. The IIW LSE method consistently predicted higher SHSS than the Haibach method, while mesh refinement produced variations below 4%. In contrast, weld geometry had a greater influence on SHSS prediction, with the chamfer model producing the highest stress. Fine meshes required approximately five to six times longer computational time than coarse meshes while providing only marginal improvements in SHSS prediction. Weld geometry representation was therefore found to have a greater influence on SHSS prediction than mesh density. The IIW LSE method is recommended for conservative structural assessment, whereas the Haibach method is suitable for preliminary engineering analyses requiring simpler post-processing.

Page 8 of 8 | Total Record : 77

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