A Study on Dissimilar Welding of AISI 1020 Carbon Steel and AISI 201 Stainless Steel Using Flux Core Arc Welding Processes | ||||
| Egyptian Journal of Chemistry | ||||
| Volume 68, Issue 4, April 2025, Page 75-89 PDF (1.61 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejchem.2025.341621.10931 | ||||
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| Authors | ||||
Mahmoud Abbas1; Gamal Abdelbakey Bastawesy2; Hamed Ahmed Abdel-Aleem   3
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| 1Department of Metallurgical and Materials EngineeSuez University, Faculty of Petroleum and Mining Engineering, Department of Metallurgical and Material Engineering, Suez, P.O. box 43322, Egyptring, Petroleum and Mining Engineering | ||||
| 22Khalda petroleum company – Production oil and gas Co, new Maddi – Cairo –Egypt, Asset integrity department, Egypt, Master Student at Suez University, Faculty of Petroleum and Mining Engineering, Department of Metallurgical and | ||||
| 3Welding Technology Department, central Metallurgical Research and Development Institute (CMRDI) | ||||
| Abstract | ||||
| This study investigates the dissimilar welding of AISI 1020 carbon steel and AISI 201 stainless steel using the Flux-Cored Arc Welding (FCAW) process. The effects of varying heat inputs (low: 3.5 kJ/mm and high: 5.0 kJ/mm) on the microstructure, mechanical properties, and economic feasibility of the weldments were comprehensively analyzed. Non-destructive testing (NDT), including radiographic inspections, confirmed defect-free welds, ensuring high-quality joints. Microstructural analysis conducted using optical microscopy and scanning electron microscopy (SEM) equipped with energy-dispersive spectroscopy (EDS) revealed an austenitic matrix with delta ferrite content decreasing from 8.5% at low heat input to 6.8% at high heat input. Hardness testing showed a reduction in weld metal hardness from 227 HV at low heat input to 170 HV at high heat input, while tensile testing revealed ultimate tensile strengths of 749 MPa and 675 MPa, respectively. Fracture analysis demonstrated ductile failure modes, with finer dimples observed at lower heat inputs, reflecting higher ductility. An economic analysis highlighted FCAW’s cost-effectiveness for large-scale applications, emphasizing its advantages in terms of labor and material costs. This study underscores the critical role of heat input optimization in FCAW to enhance weld quality, mechanical performance, and economic viability, offering valuable insights for industrial applications involving dissimilar metal welding. | ||||
| Keywords | ||||
| Stainless steel class 201; low-carbon steel AISI1020; fusion welding FCAW; Mechanical performance, Heat input. Dissimilar welding, Cost-Effectiveness | ||||
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