The history of the ironware relics of the Silla and Kaya age are discussed with the materials excavated from the ancient tombs at Kyongju area. The chemical analysis of the sample pieces obtained from the seven different kinds of the ironware relics were performed. The chemical elements analyzed are Mn, Cu, Ag, Pb, Zn, Cr, Ni, S, Si and C. The result shows that the high carbon steel had been used in that age for making the weapons, such as the sword, the helmet, and the arrowhead, etc.