This specification covers age-hardening stainless steels that are used primarily for parts requiring high strength, good corrosion resistance, and good mechanical properties at both ambient and elevated temperatures.
The most widely used grade under this specification is , commonly known as 17-4 PH . Other specialized grades provide varying balances of toughness, strength, and corrosion resistance. astm a564 pdf
Standard Specification for Hot-Rolled and Cold-Finished Age-Hardening Stainless Steel Bars and Shapes. good corrosion resistance