INVESTIGASI PENGARUH HEAT TREATMENT TERHADAP KEKERASAN BAJA KARBON S40C PADA PROGRESSIVE DIES. Journal Foundry, [S. l.], v. 5, n. 1, p. 19–24, 2022. Disponível em: https://e-journal.polmanceper.ac.id/index.php/foundry/article/view/66. Acesso em: 1 jul. 2026.