AMS 5629 is an aerospace material specification for a premium quality corrosion resistant
precipitation hardenable steel alloy. Common names for the alloy are 13-8 or UNS S13800.
AMS 5629 includes material in the form of bars, wire,forgings, forging stock, tubing, extrusions,
and rings.
This alloy is typically used where a combination of strength and corrosion resistance is required
in applications with service temperatures up to 600 deg F.
AMS 5629 requires vacuum induction melting and consumable electrode remelting.
With the exception of forging stock, material to this standard is supplied in the solution heat
treated condition.
To assure the results of the final precipitation hardening treatment; samples of the product are
precipitation hardened and tensile tested for conformance to specification minimum

For more info on stainless steel grade 13-8 ph check out the long video here, and for the actual grade page for 13-8 click here.