description Bututun ƙarfe (bututun da aka yi da ƙarfe) yana da ɓangaren giciye mai zurfi wanda ya fi tsayi da diamita ko kewayen ƙarfe.Dangane da siffar giciye, an raba shi zuwa madauwari, murabba'i, rectangular da bututun ƙarfe na musamman;bisa ga kayan, an kasu kashi carbon tsarin karfe bututu, low-alloy tsarin karfe bututu, gami karfe bututu da hada karfe bututu;Karfe bututu don thermal kayan aiki, petrochemical masana'antu, inji masana'anta ...