Analysis Of The Effect Of Welding Flow Variations On The Physical Properties Of The Plate Materials

Strength is the ability of a metal to resist deformation due to external forces. Tensile ability test is performed to estimate material characteristics in the planning of a construction, and hardness is the resistance of metal to pressure penetration. The amount of hardness of a material can be known by conducting tests, so that the strength of the material is obtained. This study aims to analyze the current strength simulation system regarding the mechanical properties of plate material that undergoes a welding treatment process using electric welding and the effect of welding on strength, hardness and microstructure. The method used in this study is experimental research and literature review on the analysis of the effect of variations in current strength (65, 70, 75, 80) Amperes as an effort to determine the strength and hardness of the material. The conclusion in this study states that the main metal material is steel with the following mechanical properties Tensile strength: 43.8 Kg/mm2, Broken strain: 4.8% , Reduction of broken cross-section: 6.5%, Rockwall Hardness: 132.4 Characters fracture: Brittle fracture, then the hardness that occurs due to the influence of welding is distributed according to the distance from the center point of the weld. The farther from the center of the weld the smaller the effect, this happens because the influence of heat in this area is also smaller, the greater the current used when welding, the rougher the shape of the metal grains