Effect of Filler Metal Diameter on Weld Joint of Carbon Steel SA516 Gr 70 and Filler Metal SFA 5.17 in Submerged Arc Welding SAW

Authors: A. Nait Salah, M. Kaddami

Abstract:

This work describes an investigation on the effect of filler metals diameter to weld joint, and low alloy carbon steel A516 Grade 70 is the base metal. Commercially SA516 Grade70 is frequently used for the manufacturing of pressure vessels, boilers and storage tank, etc. In fabrication industry, the hardness of the weld joint is between the important parameters to check, after heat treatment of the weld. Submerged arc welding (SAW) is used with two filler metal diameters, and this solid wire electrode is used for SAW non-alloy and for fine grain steels (SFA 5.17). The different diameters were selected (Ø = 2.4 mm and Ø = 4 mm) to weld two specimens. Both specimens were subjected to the same preparation conditions, heat treatment, macrograph, metallurgy micrograph, and micro-hardness test. Samples show almost similar structure with highest hardness. It is important to indicate that the thickness used in the base metal is 22 mm, and all specifications, preparation and controls were according to the ASME section IX. It was observed that two different filler metal diameters performed on two similar specimens demonstrated that the mechanical property (hardness) increases with decreasing diameter. It means that even the heat treatment has the same effect with the same conditions, the filler metal diameter insures a depth weld penetration and better homogenization. Hence, the SAW welding technique mentioned in the present study is favorable to implicate for the industry using the small filler metal diameter.

Keywords: ASME, base metal, filler metal, micro-hardness test, submerged arc welding.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.2571961

References:

[1] W. Chuaiphan, C. A. Somrerk, S. Niltawach, and B. Sornil. 2012. Dissimilar Welding between AISI 304 Stainless Steel and AISI 1020 Carbon Steel Plates. Applied Mechanics and Materials. 268-270: 283-290.
[2] H. Ki, C. S. Kim, Y. C. Jeon, and S. I. Kwun. 2008. Fatigue Crack Growth Characteristics in Dissimilar Weld Metal Joint. Materials Science Forum. 580-582: 593-596.
[3] P. Kah and M. S. Jukka Martikainen. 2013. Trends in Joining Dissimilar Metals by Welding. Applied Mechanics and Materials. 440: 269-276.
[4] A Ghosha, Somnath Chattopadhyayab, R. K. Dasb, P. K. Sarkar.2011. Assessment of Heat Affected Zone of Submerged Arc Welding Process through Digital Image Processing. Applied Mechanics and Materials. 10 (2011) 2782–2785.
[5] Ambuj Saxena, A. Kumaraswamy, G. Madhusudhan Reddy b, Vemuri Madhu b, Influence of welding consumables on tensile and impact properties of multi-pass SMAW Armox 500T steel joints vis-a-vis base metal.
[6] Karlo Seleš, Mato Perić, Zdenko Tonković, Numerical simulation of a welding process using a prescribed temperature approach.
[7] Magudeeswaran G, Sathyanarayanan S, Reddy GM, Moitra A, Venugopal S, Sasikala G, Balasubramanian V. Effect of welding consumables and processes on dynamic fracture toughness (J 1d) of armour grade Q&T steel joints. Iron mak Steel mak 2009; 36: 50e62.
[8] Magudeeswaran G, Balasubramanian V, Sathyanarayanan S, Reddy GM, Moitra A, Venugopal S, Sasikala G. Dynamic fracture toughness (JId) behavior of armor-grade Q&T steel weldments: effect of weld metal composition and microstructure. Met Mater Int 2009; 15: 1017e26.
[9] S. W. Wen, P. Hilton, D. C. J. Farrugia. Finite element modelling of a submerged arc welding process. 20 December 2001.
[10] Shashank Soni1, Ravindra Mohan1, Lokesh Bajpai1 and S K Katare1. Reduction of welding defects using six sigma techniques. 2013 ijmerr issn 2278.