The ASTM A693 specification covers precipitation-hardening stainless steel plate, sheet, and strip. The mechanical properties of these steels are developed by suitable low-temperature heat treatments generally referred to as precipitation hardening. Some of the steels can be extremely useful for moderate to severe drawing and forming in a solution-treated condition, while others are capable of mild forming only. These steels are suitable for machining in the solution-annealed condition, after which they can be hardened to the mechanical properties required, without danger of distortion or cracking.
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Please see the ASTM Site for additional information regardng this specification