Egburu ígwèbụ ígwè e deoxidized kpam kpam site n'ịgbakwụnye onye nnọchi anya tupu nkedo nke na ọ fọrọ nke nta ka ọ dịghị evolushọn nke gas n'oge solidification. A na-eji ya dị elu nke homogeneity kemịkalụ na nnwere onwe pụọ na porosities gas.

Igwe eji egbu egbu na-abụkarị nchara deoxidized, mana carbon monoxide na-ahapụ ụdị porosity nke na-ekesa n'ime ingot. Porosity ahụ na-ewepụ ọkpọkọ a chọtara n'ime ígwè e gburu egbu ma mee ka mkpụrụ ya dị ihe dịka 90% site n'ịdị arọ. A na-ejikarị ígwè arụrụ arụ ọrụ nke nwere ihe dị n'etiti 0.15 na 0.25% carbon, n'ihi na a na-atụgharị ya, nke na-emechi porosity.

Nchara rimmed, nke a makwaara dị ka ịbịaru nchara dị mma, enweghị obere ihe na-eme ka ọ ghara imebi ihe a na-agbakwunye na ya n'oge nkedo nke na-eme ka carbon monoxide pụta ngwa ngwa site na ingot. Nke a na-ebute obere oghere n'elu nke na-emecha mechie na usoro ntụgharị ọkụ. Ọtụtụ nchara nchara nwere carbon dị n'okpuru 0.25%, ọdịnaya manganese dị n'okpuru 0.6%, ọ bụghịkwa ya na aluminom, silicon, na titanium.