Singumvelisi onikezela ngezixhobo ezahlukeneyo (i-grey iron, i-ductile iron, i-carbon steel, i-alloy steel, i-stainless steel, i-aluminium, ubhedu, i-nickel bronze, njl.

Ngokubanzi ziintsuku ezili-1-15 ukuba iimpahla zikhona. okanye malunga neentsuku ezingama-30-45 ukuba iimpahla azikho kwisitokhwe, ngokuxhomekeke kubungakanani.

Iindleko zokuhambisa zixhomekeke kwindlela okhetha ukufumana ngayo iimpahla. Ukucacisa yeyona ndlela ikhawulezayo kodwa enexabiso kakhulu. Ngokuloba elwandle sesona sisombululo sisiso semali enkulu. Ngokuchanekileyo amaxabiso ezinto sinokukunika kuphela ukuba siyazazi iinkcukacha zesixa, ubunzima kunye nendlela. Nceda unxibelelane nathi ngolwazi oluthe kratya.