AGUSTIAN, E., Somawardi and Sugianto 2021. Analysis of the Effect of Cooling Media and the Combination of Cooling Holding Time on the Hardness Value of AISI-1045 Steel in the Quenching Process. Manutech : Jurnal Teknologi Manufaktur. 13, 01 (Jun. 2021), 25-32. DOI:https://doi.org/10.33504/manutech.v13i01.169.