International Journal of Engineering and Advanced Technology (IJEAT) ISSN: 2249 – 8958, Volume-5 Issue-1, October 2015 149 Published By: Blue Eyes Intelligence Engineering & Sciences Publication Pvt. Ltd. Abstract— Submerged arc welding (SAW) process is an essential metal joining processes in industry. The quality of weld is a very important working aspect for the manufacturing and construction industries, the challenges are made optimal process environment. Design of experimental using Taguchi method (L9 orthogonal array (OA)) considering three SAW parameter are (welding current, arc voltage and welding speed) and three levels (300-350-400 Amp. , 32-36-40 V and 26-28-30 cm/min). The study was done on SAW process parameters on the mechanical properties of steel type comply with (ASTM A516 grade 70). Signal to Noise ratio (S/N) was computed to calculate the optimal process parameters. Percentage contributions of each parameter are validated by using analysis of variance (ANOVA) technique. The experimental results were analyzed by using Minitab 16 software. Keyword-ANOVA, SAW, S/N, Taguchi Method, Welding Process Parameters I. INTRODUCTION The welding processes are used to joining different materials together. It is economical and faster process compared with other manufacturing process. SAW is the essential semiautomatic welding processes used firstly in 1930s to made good quality of weldment. The various parameters like welding current, arc voltage, wire feed speed, welding speed, torch angle and the electrode stick out are affecting on the weld quality. In this study, the welding process parameter was chosen as welding speed, arc voltage, and welding current. Welding current is a major factor that influences the penetration. Arc voltage and welding speed are also factors that can influence the penetration were studied by Syarul A. et al [1]. Shahnawaz alam et al. [2] Studied the effect of arc voltage, current, welding speed, wire feed rate and nozzle-to-plate distance on weld bead width. Chandel et al. [3] studied the increasing of deposited rate on the welded bead geometry of SAW. Yang et al. [4] studied the effects of SAW process parameters on the weld deposit pool. Optimal parameter combination for bead geometry was studied by Saurav datta et al [5]. Keshav Prasad [6] investigates the influence of the SAW process parameters (welding current and welding speed) on the microstructure, hardness, and toughness of HSLA steel weld joints. S. Kumanan et al. [7] applied Taguchi method and regression to calculate the optimal parameters for SAW. Ravinder Pal Singh et al. [8] present a comprehensive review of parameters of SAW and their effect on weld quality. Murugan et al. [9] studied the relationships between weld bead geometry and shape in SAW of pipes. Tarng and Yang [10] was studies the application of Revised Version Manuscript Received on November 02, 2015. Asst. prof. Dr. Zuhair Issa Ahmed, Mechanical Engineering Department, University of Baghdad, Baghdad, Iraq. Ali Malik Saadoon, Mechanical Engineering Department, University of Baghdad, Baghdad, Iraq. Taguchi technique in order to optimize the SAW process. Ankita Singh et al. [11] investigated the optimization of bead geometry of SAW using fuzzy based desirability function approach for SAIL Steel, IS 2062. The aim of this paper is to evaluate the effect of process parameters on mechanical properties of low carbon steel ASTM A516 Grade 70 steel, which is used for manufacturing of pressure vessel and boiler steel. It is widely used in nuclear piping systems. SUBMERGED ARC WELDING (SAW) SAW is a consumable electrode arc welding process in which the arc is shielded by a molten slag and the arc atmosphere are generated by decomposition of certain slag constituents. The filler material is a continuously fed wire and very high melting and deposition rates are achieved by using high currents with relatively small-diameter wires. The significant features of the process are: • High deposition rates. • Automatic operation. • No visible arc radiation. • Flexible range of flux/wire combinations. • Normally used for thicknesses above 6 mm. The main applications of SAW are on thick section plain carbon and low-alloy steels and it has been used on power generation plant, nuclear containment, heavy structural steelwork, offshore structures and shipbuilding. The process is also used for high-speed welding of simple geometric seams in thinner sections, for example in the fabrication of pressure containers for liquefied petroleum gas. (SAW) is a multi-objective, multi-factor metal joining technique. Major limitations of SAW are limitation in positions, primarily used for weld mild and HSLA steels [12]. The schematic illustrations of the SAW process and equipment are shown in Figure 1 [13]. Figure1 schematic illustrations of the SAW process and equipment [13]. TAGUCHI METHOD Taguchi’s method is an important tool for the design of experiment used for high quality product in manufacturing system. Orthogonal arrays are a special design by Taguchi method it used to study the process parameter space with only a small number of experiments. Taguchi’s S/N are Optimization Process Parameters of Submerged Arc Welding Using Taguchi Method Zuhair Issa Ahmed, Ali Malik Saadoon