Lead + Calcium Carbonate
| Chemical Formula | Available Form | Description of the Product |
| Pb – 95%, CaCO3 – 5% | Ingot, Granules, Powder, Shots, Cored wire | Lead is only slightly soluble in liquid or solid steel and, when added, some will be present as a dispersion of discrete but preferably submicroscopic metallic lead inclusions. Its sole function is to improve machinability. It is only added to steels for improving machinability. |