A na-ewere ọkwa nchara 304 na-ewerekarị igwe anaghị agba nchara. O nwere ọdịnaya Nickel dị elu, na-abụkarị pasent dị arọ 8 na 10,5, na nnukwu chrim gburugburu 18 ruo 20. Isi ihe ndị ọzọ dị mkpa gụnyere manganese, silicon na carbon. Ihe mejupụtara kemịkal bụ tumadi iron.