bainite
noun
bain·ite
ˈbā-ˌnīt
plural -s
: a transformation product in solid steel developed from austenite at temperatures intermediate between those where pearlite and martensite form
bainitic adjective
ˌbā-ˈni-tik
"The microstructure in the worn surfaces of a failed bainitic steel railway crossing was investigated using optical microscopy … " scientists in Qinhuangdao, People's Republic of China report. 
Journal Of Technology & Science, 11 July 2010
Journal Of Technology & Science, 11 July 2010 
Word History
Etymology
Edgar C. Bain, born 1891 American physicist and metallurgist + English -ite
First Known Use
1930, in the meaning defined above