Types
There are four main types of free machining steel: leaded, resulfurized, rephosphorized and resulfurized, and super. Super free-machining steels are alloyed with tellurium, selenium, and bismuth.
| Type | SAE designation |
|---|---|
| Leaded | 12L13 |
| 12L14 | |
| Rephosphorized and resulfurized | 1211 |
| 1212 | |
| 1213 | |
| Resulfurized | 1117 |
| 1118 | |
| 1119 |
Read more about this topic: Free Machining Steel
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