Diversified Australian miner Astra Mining announced on Wednesday plans to list on the Frankfurt Stock Exchange before the end of August after two days earlier inking a deal to enter the Nigerian market and further expand its global presence. Deal-hungry Astra Mining’s global portfolio includes gold and tin interests in south east Asia and southern India, coal mines in Australia, iron ore in India, manganese in Africa and the commercialisation of a new high-strength steel technology from a base in Hungary.