Description / Abstract:
Form
This specification covers a premium aircraft-quality
corrosion-resistant steel in the form of bars, wire, forgings,
mechanical tubing, flash welded rings, and stock for forging or
flash welded rings.
Application
Primarily for parts requiring corrosion resistance approximating
that of 18-8 type steels and high strength exceeding that of 12Cr
martensitic type steels up to 700 °F (371 °C), but usage is not
limited to such applications. This steel can be used in the
solution heat treated condition and is capable of being
precipitation heat treated to tensile strengths as high as 180 ksi
(1241 MPa) with good ductility and strength in the transverse
directions in large section sizes.
Although this steel is relatively immune to stress-corrosion
cracking, reference should be made to ARP1110 for recommended
practices to minimize such conditions.
Classification
Steels covered by this specification are classified as
follows:
Type 1 – Multiple melted using electroslag process in the remelt
cycle.
Type 2 – Multiple melted using consumable electrode vacuum
practice in the remelt cycle.
Type 1 shall be supplied unless Type 2 is permitted by
purchaser.