The congress proceedings will be indexed by Scopus and Google Scholar. MCM is aimed to become one of the leading international annual congresses in the fields of mechanical, chemical, and material engineering. The congress is composed of 4 conferences. While each conference consists of an individual and separate theme, the 4 conferences share considerable overlap, which prompted the organization of this congress. HTFF'22 - 9th International Conference on Heat Transfer and Fluid Flow ICMIE'22 - 11th International Conference on Mechanics and Industrial Engineering MMME'22 - 9th International Conference on Mining, Material and Metallurgical Engineering ICCPE'22 - 8th International Conference on Chemical and Polymer Engineering This Mechanical Congress 2021 will provide excellent opportunities to the scientists, researchers, industrial engineers, and university students to present their research achievements and to develop new collaborations and partnerships with experts in the field.