Steel, Corrosion-Resistant, Bars, Wire, Forgings, Rings, and Extrusions 13Cr - 8.0Ni - 2.2Mo - 1.1Al Vacuum Induction Plus Consumable Electrode Melted Solution Heat Treated, Precipitation Hardenable
|Publication Date:||1 April 2021|
This specification covers a premium aircraft-quality corrosion-resistant steel in the form of bars, wire, forgings, flash welded rings, and extrusions up to 12 inches (305 mm) in nominal diameter, or least distance between parallel sides in the solution heat treated condition (see 8.4), and stock of any size for forging, flash welded rings, or extrusion (see 8.8).
For purchase of solution treated and aged product, use the applicable AMS slash specification (see 8.4). If a slash sheet description is not specified, solution annealed material shall be supplied. A specific example of a slash specification is:
AMS5629/H1000 - Precipitation Hardened to H1000 condition
These products have been used typically for parts requiring corrosion resistance, stress-corrosion resistance, high strength up to 600 °F (316 °C), and good ductility and strength in the transverse direction in large section sizes, but usage is not limited to such applications.
Certain design and processing procedures may cause these products to become susceptible to stress-corrosion cracking; ARP1110 recommends practices to minimize such conditions.
Product covered by this specification is classified as follows:
Type 1 - Steel multiple melted using vacuum consumable electrode remelting.
Type 2 - Steel multiple melted using electroslag remelting.
When a type is not specified, Type 1 shall be supplied.
Maximum Delta Ferrite Content
Class A - 0.5% max., free ferrite.
Class B - 1.0% max., free ferrite.
Class C - 2.0% max., free ferrite.
When no class is specified, any class may be supplied.