Heat Treatment Special Class by Assoc.Prof.Somnuk Watanasriyakul (President of Thai Heat Treating Association), Asst.Prof.Dr.Usanee Kitkamthon (Chair of Metallurgical Engineering, SUT) and Asst.Prof.Dr.Rattana Borrisutthekul (Lecturer of Metallurgical Engineering, SUT) 0n 29-Sep, 9-Oct and 23-Oct-2020.