Effect of Heat Treatment and Tempering Process on the Hardness of S55c Steel as A Cutting Blade Material for Plastic Shredding Machines. Integrated Science Education Journal, [S. l.], v. 7, n. 1, p. 127–136, 2026. Disponível em: https://cahaya-ic.com/index.php/ISEJ/article/view/2461. Acesso em: 22 may. 2026.