As we can see in the table, with my own data I found the chemical composition of SN1604, and it is composed mainly of iron XVIII, 80%, and the part of silicon that is composed, 11%, is also significant. Acoording to Pilar RuizLapuente,Jonay González Hernández,Hugo Tabernero et al. This supernova is rich in nitrogen. In addition, they claim that the main compound is iron.