Grade has very high strength and 140 ksi (40HRC Maximum) and 150ksi (45HRC Maximum) yield strengths can be achieved with modified aging cycle as per API 6ACRA Issue 1 Addendum 3, excellent subzero impact properties even at higher strengths.
Excellent corrosion resistance and so is used in a range of severe corrosive environments for applications such as hangers, gates and stems.