Dissimilar Welding of SS 409 and Mild Steel by Gas Tungsten Arc Welding (TIG) Method by ER 309 L Electrodes

Abstract:

The dissimilar material welding at lower expensive is one of the popular techniques which are used in power generation services such as mining, petro chemical refineries and mineral processing plant as well as recuperator in furnace system. For these applications, the insulation plays an important role for effective result. Fluid flow from one medium to another medium is carried out through insulation materials to prevent the transmission of excessive heat. If it gets wet, it loses all its insulation properties. It is easily crushed if the pipe gets stepped on. The materials serves important role to save the heat energy in operating and constructing the power plant. In this research work, mild steel and stainless steel SS 409 are welded together by ER 309 L electrode by TIG welding process to achieve these applications. Service temperature is sensible; inside temperature is maintained low because of rapid cooling. This research concludes that, insulation material is not necessary for dealing out the material (below 700°C). Stainless steel SS 409 tends to contract and expand more and serves as good corrosion resistant material at the service temperature. Mild steel is a good heat conductor; it cools quickly and contract earlier as the joint cools and the heat is removed from the metal surface.

• Periodical: Applied Mechanics and Materials (Volumes 813-814)
• Pages: 420-424
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.813-814.420
• Online since: November 2015
• Authors: G. Britto Joseph*, Kuldip Das, G. Murugesan, R. Prabhaharan
• Keywords: ER 309 L, GTAW, Mild Steel, SS 409

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