| 1 | The cementite phases still increase with the increase of carbon content. | |
| 2 | The stable phases in soft steel at room temperature are ferrite and cementite . | |
| 3 | The steel shall not be surface carburized . Where it is suspected that there is surface carburization the method described in appendix C shall be used for detection. | |
| 4 | For the iron and steel industry in the quenching of cutting tools for the steel of carburization . | |
| 5 | The tempering operation may be described as one of precipitation and agglomeration or coalescence of cementite. |