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This is to certify that your paper entitled «Investigation and comparison of microstructure and mechanical properties of similar joints of ۳۱۶ stainless steel and ۲۲۰۵ duplex steel by laser welding» was indexed with 1 pages, in the CIVILICA citation database, code COI:INCWI25_032, after evaluation and approval of the referees of the "7th International Conference on Welding and Non Destructive Testing & 25th National Conference on Welding & Inspection & 14th National Conference on NDT & 3nd National Conference on Additive Manufacturing held in Tehran 2025.

While offering our congratulations on the indexation of your paper, please be informed that this certificate is prepared based on the information submitted by the secretariat of the above conference and the information contained in the CIVILICA database, and the accuracy of its content can be inquired at any time through link provided at the bottom of the page or scanning the code image.