You can read more about that in this paper: https://iopscience.iop.org/article/10.3847/PSJ/abf63b

"We find that the best matching mixture to Psyche consists of 82.5% metal, 7% low-Fe pyroxene, and 10.5% carbonaceous chondrite by weight, suggesting that the asteroid is less metallic than originally estimated (∼94%). "