Typical Chemistry Data:
| Grade | Classification | C. | Mn. | P.Max | S.Max | Si. | Ni. | Cr. | Mo. |
| 1018 | Low Carbon | .18 | .75 | .04 | .05 | .20 | — | — | — |
| 1045 | Medium Carbon | .45 | .75 | .04 | .05 | .20 | — | — | — |
| 1141 | Medium Carbon RS | .41 | 1.50 | .04 | .13 | .20 | — | — | — |
| 4140 | Chrome Moly | .40 | .87 | .04 | .04 | .20 | — | .95 | .20 |
| 4150 | Chrome Moly | .50 | .87 | .04 | .04 | .20 | — | .95 | .20 |
| 4150RS | Chrome Moly | .50 | .87 | .04 | .08 | .20 | — | .95 | .20 |
| 4340 | Nickel Chrome Moly | .40 | .70 | .04 | .04 | .20 | 1.82 | .80 | .25 |
| 8620 | Nickel Chrome Moly | .20 | .80 | .04 | .04 | .20 | .55 | .50 | .20 |