The time super glue takes to dry on steel depends upon environmental conditions as well as the amount used on the steel surface. For example, applying a thin layer of super glue on the steel and letting a fan dry it out will probably dry out much quicker than applying a thick layer and letting it dry out without a fan. But in any case, it should not take more than twenty-four hours to dry the super glue on the steel completely. The same goes for the superglue in the bottle; if exposed to air, it will dry out quickly.