Saragih, A.D. et al. 2023. Studi Perlakuan Panas Terhadap Sifat Kekerasan Pada Baja ST 60. Piston: Journal of Technical Engineering. 7, 1 (Aug. 2023), 12–19. DOI:https://doi.org/10.32493/pjte.v7i1.28872.