Alireza Mokhtari Hemami from Iran claimed a gold medal in the men's shot put F53 Friday night.
Mokhtari Hemami won the gold medal with a record of 8.35m.
America's Scot Severn came second with 8.13m and Mokhtari Hemami's compatriot Asadollah Azimi finished third with 7.96m.
Iranian para athletes had already won one gold, seven silver and four bronze medals in the competition.
The World Para Athletics Championships will run through July 23 in London.
More than 1,150 athletes from 90 countries are competing in 202 medal events.