AMS 6257

SAE International: This specification covers a premium aircraft-quality, low-alloy steel in the form of bars, forgings, mechanical tubing, and forging stock.

AMS 6359

SAE International: This specification covers an aircraft-quality, low-alloy steel in the form of sheet, strip, and plate.

AMS 6415

SAI International: This specification covers a premium aircraft-quality, low-alloy steel in the form of bars, forgings, mechanical tubing, and forging stock. (Vac-Melt).

AMS 6414

SAE International: This specification covers a premium aircraft-quality, low-alloy steel in the form of bars, forgings, mechanical tubing, and forging stock. (Air-Melt).