Thamizhmanii, S., and S. Hasan. “Machinability Characteristics of Hard SCM 440 Alloy Steel using CBN and PCBN Tools by Turning Process”. Applied Science and Engineering Progress 4, no. 1 (September 9, 2013): 15–21. accessed February 9, 2025. https://ph02.tci-thaijo.org/index.php/ijast/article/view/67375.