Effects of Heat Treatment on the Impact and Hardness Properties of Mild Steel [ASTM 36] Lap Welded JointO. M. Ikumapayi, E. T. Akinlabi, V. O. Anyoha, I. D. Uchegbu, O. L. Rominiyi, H.A. Benjamin and S. A. AkinlabiE3S Web Conf., 309 (2021) 01078DOI: https://doi.org/10.1051/e3sconf/202130901078