4130 is a low alloy steel containing molybdenum and chromium as its strengthening agents. The carbon content is nominally 0.30% and is excellent from a weldability standpoint. The alloy can be hardened by heat treatment. Typical applications for 4130 low alloy steel include structural use such as aircraft engine mounts and welded tubing applications.
| Specification | Description |
|---|---|
| AMS 6345 | Steel Plates, Sheets, Strips and coil. Normalized. |
| AMS 6346 | Steel Bars. |
| AMS 6348 | Steel Bars. |
| AMS 6350 | Steel Plate Sheets, Strips.. |
| AMS 6351 | Steel PlateSheets, Steel Strips and coil. |
| AMS 6370 | Steel Bars, Forgings, and Rings. |
| AMS 6371 | Steel Tubing |
| AMS-S-6758 | Steel Bars and Forgings. |
| Cond. F-4 | Steel Bars. 125-145 KSI. |
| DMS 2284 | Steel Bars and Forgings. Quality Aircraft |
| MIL-S-18729 | Steel Plate, Sheet, And Strip. Aircraft Quality. |
| MIL-S-6758 | Steel Bars And Forgings. |
| MIL-T-6736 | Steel Tubing. |