This specification covers a corrosion-resistant steel in the form of bars, wire, forgings, flash welded rings, extrusions, and stock for forging, flash welded rings, or extruding.
These products have been used typically for parts requiring corrosion resistance and high strength up to 600 °F (316 °C) with 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.
Rationale: AMS5659N identifies a new procedure for ordering bars in the precipitation heat treated condition (1.1.1), includes a restriction on bar being cut from plate (184.108.40.206), revises macrostructure requirements (220.127.116.11), clarifies thickness of bars (18.104.22.168), removes the requirement for hardness testing after precipitation heat treatment (22.214.171.124, 4.4.2), revises Heat Treatment (3.4) and time tolerances for precipitation heat treatment (Table 3), clarifies tensile orientation for transverse tests (126.96.36.199.1.3), includes tolerances for extrusions (3.7), revises reports (4.4) and ordering data (8.6).
Also known as: SAE AMS 5659
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