“Effect of Heat Treatment and Tempering Process on the Hardness of S55c Steel as A Cutting Blade Material for Plastic Shredding Machines”, In. Sci. Ed. J, vol. 7, no. 1, pp. 127–136, Jan. 2026, Accessed: May 22, 2026. [Online]. Available: https://cahaya-ic.com/index.php/ISEJ/article/view/2461