AMS6551B Steel Bars, Forgings, Mechanical Tubing and Forging Stock 1.75Cr - 4.0Ni - 0.5Mo - (0.35 - 0.40C) Premium Aircraft Quality Consumable Electrode Vacuum Remelted
Revised
9/10/2026
- Content
- This specification covers a premium aircraft-quality, low-alloy steel in the form of bars, forgings, mechanical tubing, and forging stock.
- Citation
- SAE International Material Specification, Steel Bars, Forgings, Mechanical Tubing and Forging Stock 1.75Cr - 4.0Ni - 0.5Mo - (0.35 - 0.40C) Premium Aircraft Quality Consumable Electrode Vacuum Remelted, SAE Standard AMS6551B, Revised September 2026, Issued February 2013, https://doi.org/10.4271/AMS6551B.