Precipitation hardening stainless steels have moderate to good corrosion resistance in a range of environments. They have a better combination of strength and corrosion resistance than when compared with the heat treatable 400 series martensitic alloys. Corrosion resistance is similar to that found in grade 304 stainless steel.

Condition	Hardening	Hardening	Type of Cooling	Hardness
	Temperature	Time		Brinell	Rockwell C
A	1038°C	1/2	Oil/Air (to below 32°C)	363 max.	39 max.
H900	480°C	1	Air	420	44
H925	594°C	4	Air	409	42
H1025	55°C	4	Air	352	38
H1075	85°C	4	Air	341	36
H1100	595°C	4	Air	332	35