The 7th International Conference on Material Science and Engineering Technology (ICMSET 2018) was held in Beijing, China during October 20-22, 2018 and was dedicated to new research developments and advances in the fields of materials science and engineering technology. We hope this collection of articles will be interesting and useful for the specialists in the area of materials science and technologies of materials processing. Steel, Alloys, Materials Processing Technologies, Polymers, Composites, Building Materials, Catalysts, Nanomaterials Materials Science, Mechanical Engineering, Manufacturing.