654877bd_erials_Science_and_Engineering__Significance
[Date] 300 BC (estimated) [Candidate Moment] Metal workers in south India develop crucible steel making. [Significance] 
Produces "wootz" steel which becomes famous as "Damascus" sword steel hundreds of years later, inspiring artisans, blacksmiths, and metallurgists for many generations to come.
Greatest Moments in Materials Science and Engineering
Significance