STUDI EKSPERIMENTAL VARIASI KUAT ARUS LISTRIK PENGELASAN TERHADAP KEKUATAN TARIK DAN IMPACT

Abstract

This study aims to determine the tensile strength and impact on the variation of the current strength 55-65 A, 70-80 A, 85-95 A, 100-110 A by using Las SMAW (Shield Metal Arc Welding) AC. This study uses a low carbon steel. Material treated with a variety of powerful welding current 55-65 A, 70-80 A, 85-95 A, 100-110 A. With menggunalan SMAW welding electrode RB26 AC with a diameter of 2.6 mm. Seam types used are hem V with a 70^o angle. Specimens testing the tensile and impact. The tensile strength is highest in current variation 100-110 amperes is equal to 449 MPa, which dropped by 12.5 MPa of raw material. The highest yield strength at current variation 100-110 amperes is equal to 333.6 MPa which is an increase of 23.6 MPa of raw material. On testing the impact energy value is highest impact on current variation 85-95 Ampere is equal to 57.02 Joule is an increase of 9.63 Joules of raw material. Value price is highest impact on the variation of the current 85-95 ampere is equal to 1,007 Joules / mm2 which increased by 0.065 Joules / mm² of raw material.