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Irin àlàfo
Awọn eekanna oni jẹ deede ti irin, nigbagbogbo bọ tabi ti a bo lati ṣe idiwọ ipata ni awọn ipo lile tabi lati mu ilọsiwaju pọ si.Awọn eekanna ti o wọpọ fun igi nigbagbogbo jẹ rirọ, erogba kekere tabi irin “iwọnwọn” (nipa 0.1% erogba, irin iyokù ati boya itọpa silikoni tabi manganese).Eekanna fun kọnja ni lile, pẹlu 0.5-0.75% erogba.
