Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 32586
Reliability of Dissimilar Metal Soldered Joint in Fabrication of Electromagnetic Interference Shielded Door Frame

Authors: Rehan Waheed, Hasan Aftab Saeed, Wasim Tarar, Khalid Mahmood, Sajid Ullah Butt


Electromagnetic Interference (EMI) shielded doors made from brass extruded channels need to be welded with shielded enclosures to attain optimum shielding performance. Control of welding induced distortion is a problem in welding dissimilar metals like steel and brass. In this research, soldering of the steel-brass joint has been proposed to avoid weld distortion. The material used for brass channel is UNS C36000. The thickness of brass is defined by the manufacturing process, i.e. extrusion. The thickness of shielded enclosure material (ASTM A36) can be varied to produce joint between the dissimilar metals. Steel sections of different gauges are soldered using (91% tin, 9% zinc) solder to the brass, and strength of joint is measured by standard test procedures. It is observed that thin steel sheets produce a stronger bond with brass. The steel sections further require to be welded with shielded enclosure steel sheets through TIG welding process. Stresses and deformation in the vicinity of soldered portion is calculated through FE simulation. Crack formation in soldered area is also studied through experimental work. It has been found that in thin sheets deformation produced due to applied force is localized and has no effect on soldered joint area whereas in thick sheets profound cracks have been observed in soldered joint. The shielding effectiveness of EMI shielded door is compromised due to these cracks. The shielding effectiveness of the specimens is tested and results are compared.

Keywords: Dissimilar metals, soldering, joint strength, EMI shielding.

Digital Object Identifier (DOI):

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 629


[1] Weis, S., Hoyer, I., &Wielage, B. (2008). Joining of high-strength aluminum-based materials with tin-based solders. Welding Journal-New York-, 87(3), 35.
[2] Daly, B. (2013). Basics of Brazing With Induction Heating. Weld. J, 92, 52-54.
[3] Nourani, A., & Spelt, J. K. (2015). Effect of processing parameters on fracture toughness of lead-free solder joints. Engineering Fracture Mechanics, 142, 64-78.
[4] Brožek, M. (2013). Soldering sheets using soft solders. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 61(6), 1597-1604.
[5] Shangari, S. (1992). Soldering in nuclear power plants. Paper presented at the 73rd American Welding Society annual meeting.
[6] Milosavljević, A., Todorović, R., Kostov, A., &Todorović, L. Special Brass Solder For Steel Parts Hard Soldering.
[7] Darveaux, R., & Banerji, K. (1992). Constitutive relations for tin-based solder joints. IEEE Transactions on Components, Hybrids, and Manufacturing Technology, 15(6), 1013-1024.
[8] Unified facilities guide specifications section UFGS-8 56 46.20 20 (2006) Radio frequency shielded enclosures, welded type.
[9] El-Daly, A., &Hammad, A. (2010). Elastic properties and thermal behavior of Sn–Zn based lead-free solder alloys. Journal of Alloys and Compounds, 505(2), 793-800.
[10] MIL-STD-188-125-1 17 July 1998 "High-Altitude Electromagnetic Pulse (HEMP) Protection For GroundBased CI Facilities Performing Critical, Time-Urgent Missions, Part 1 Fixed Facilities".