cementite

[ si-men-tahyt ]

/ sɪˈmɛn taɪt /

an iron carbide, Fe3C, a constituent of steel and cast iron, sometimes with part of its iron replaced by another metal, as manganese.

Origin of cementite

First recorded in 1885–90; cement + -ite¹

The change from graphite into cementite is supposed to take place as we pass from left to right.

Encyclopaedia Britannica, 11th Edition, Volume 14, Slice 7 |Various
Lastly, there is a definite compound of iron and carbon, iron carbide or cementite, having the formula Fe3C.

The Phase Rule and Its Applications |Alexander Findlay
Ferrite and cementite, already described in 10, are the final products of the transformation of austenite in slow-cooling.

Encyclopaedia Britannica, 11th Edition, Volume 14, Slice 7 |Various
Here the mass consists of primary austenite, eutectic austenite and cementite interstratified and pro-eutectoid cementite.

Encyclopaedia Britannica, 11th Edition, Volume 14, Slice 7 |Various

The white-hot, solid, but soft mass is now a conglomerate of “primary” austenite, “eutectic” austenite and “eutectic” cementite.

Encyclopaedia Britannica, 11th Edition, Volume 14, Slice 7 |Various

cementite

/ (sɪˈmɛntaɪt) /

the hard brittle compound of iron and carbon that forms in carbon steels and some cast irons. Formula: Fe 3 C