| This reduces the amount of pearlite and improves toughness, ductility, and weldability. |
| Perhaps the most familiar structure in steels is that of the eutectoid pearlite, usually a lamellar mixture of ferrite and cementite. |
| The properties obtained subsequently depend on the coarseness of the pearlite and ferrite and their relative distribution. |
| The harder pearlite is comprised of alternating thin layers or shells of ferrite and cementite, a very hard substance. |
| It is important to note that higher silicon contents can promote pearlite and may increase the nickel requirement. |
| Ductility and impact properties are principally determined by the proportions of ferrite and pearlite in the matrix. |
