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Steel 4140
4140 is a chromium, molybdenum, manganese containing low alloy steel. Its known for its high fatigue strength and its impact and abrasion resistance. It also contains a high toughness and torsional strength.
| Component Element Properties | Percent |
| Iron | 96.785 – 97.77% |
| Chromium | .8 – 1.1% |
| Manganese | .75 – 1% |
| Carbon | .38 – .43% |
| Silicon | .15 – .30% |
| Molybdenum | .15 – .25% |
| Sulfur | .04% |
| Phosphorous | .035% |
Select AMS
| AMS Number | Alloy | Type | UNS | Cross Ref. Spec | Misc./Shape | |
|---|---|---|---|---|---|---|
| AMS 6349 | 4140 | Steel | G41400 | MIL-S-5626 | Bar |
|
| AMS 6381 | 4140 | Steel | G41400 | - | Tubing |
|
| AMS 6382 Bar | 4140 | Steel | G41400 | MIL-S-5626 | Bar |
|
| AMS 6382 Forging | 4140 | Steel | G41400 | MIL-S-5626 | Forging |
|
| AMS 6382 Ring | 4140 | Steel | G41400 | MIL-S-5626 | Ring |
|
| AMS 6390 | 4140 | Steel | G41400 | - | Tubing |
|
| AMS 6395 Plate | 4140 | Steel | G41400 | - | Plate |
|
| AMS 6395 Sheet | 4140 | Steel | G41400 | - | Sheet |
|
| AMS 6395 Strip | 4140 | Steel | G41400 | - | Strip |
|
| AMS 6452 | 4140 | Steel | G41400 | MIL-R-5632 | Wire |
|
| AMS 6457 | 4140 | Steel | K13147 | - | Wire |
|
| AMS 6529 | 4140 | Steel | G41400 | - | Bar |
|
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