Iron Knob, current population 156 (2005), is a town in South Australia on the Eyre Highway across Eyre Peninsula. Iron ore was originally mined here for use as flux in the copper smelting industry. The iron ore was of such high quality that it started an iron smelting industry as well. It is referred to as the birth place of the steel industry in Australia. It gets its name for the fact that it has a large amount of iron ore and was a major contributor to Australia's iron industry.