SAE AMS6270P

This specification covers an aircraft-quality, low-alloy steel in the form of bars, forgings, mechanical tubing, and forging stock.

These products have been used typically for carburized parts which require low minimum core hardness and allow wide hardness range in sections 0.375 inch (9.52 mm) and under in nominal thickness, but usage is not limited to such applications. The core should be machinable after hardening.