Anaphedwa zitsulondi chitsulo chomwe chatenthedwa kotheratu ndi kuwonjezeredwa kwa wothandizira musanaponye kotero kuti palibe kusintha kwa gasi panthawi yolimba. Amadziwika ndi mlingo waukulu wa mankhwala homogeneity ndi kumasuka ku mpweya porosities.

Chitsulo chophedwa pang'onopang'ono chimakhala chitsulo chosasunthika kwambiri, koma mpweya wa monoxide umasiya mtundu wa porosity womwe umagawidwa mu ingot. Porosity imachotsa chitoliro chopezeka muzitsulo zophedwa ndikuwonjezera zokolola pafupifupi 90% polemera. Chitsulo chophedwa ndi theka chimagwiritsidwa ntchito ngati chitsulo chokhazikika chokhala ndi kaboni pakati pa 0,15 ndi 0.25% ya kaboni, chifukwa chimakulungidwa, chomwe chimatseka porosity.

Chitsulo chachitsulo, yomwe imadziwikanso kuti chitsulo chojambula bwino, imakhala ndi mankhwala ochepa kwambiri omwe amawonjezedwa pamene akuponya zomwe zimapangitsa kuti carbon monoxide isinthe mofulumira kuchokera ku ingot. Izi zimapangitsa tibowo tating'onoting'ono pamtunda tomwe timatsekeka pakatentha kwambiri. Chitsulo chochuluka chokhala ndi mpweya chimakhala pansi pa 0.25%, manganese ali pansi pa 0.6%, ndipo sichimapangidwa ndi aluminiyamu, silicon, ndi titaniyamu.