Ali, S., Muhammad, K., Channa, A.S., Channa , F.H. , Memon , I.A. , Abro, M., Memon, G.M., Iqbal, A., Laghari, A.Q. and Noonari, S.A. 2026. Investigation of morphological and mechanical properties of hardened and tempered AISI 4340 steel. Journal of the Serbian Chemical Society. (Jun. 2026). DOI:https://doi.org/10.2298/JSC251123012A.