Stainless Steel is defined in ASTM A 941 as follows:
A steel that conforms to a specification that requires, by mass percent, a minimum chromium content of 10.5 or more, and a maximum carbon content of less than 1.2
There are two main American designation systems for stainless steels:
- Three‑digit American Iron and Steel Institute (AISI) numbering system for wrought S.S.
- American Casting Institute (ACI) designation of cast S.S.
Below table is provided as an aid in selecting cast alloys that are similar in chemical composition to wrought alloys. It is not intended to imply that the cast alloy would have the same mechanical, physical, or corrosion properties as the indicated wrought alloy.
For more details please see ASTM A 781
