SAE AMS5663P-2022 PDF

Full title and description

SAE AMS5663P — Nickel alloy, corrosion- and heat-resistant: bars, forgings, rings, and stock for forgings and rings (nominal composition ~52.5% Ni, 19% Cr, 3.0% Mo, 5.1% Cb/Nb, 0.90% Ti, 0.50% Al, balance Fe); consumable-electrode or vacuum-induction melted; supplied in solution and precipitation heat-treated condition (1775 °F / 968 °C).

Abstract

This AMS material specification (AMS5663P, revision P, 2022) defines the chemical, metallurgical and heat‑treatment requirements for a precipitation‑hardening nickel‑chromium alloy commonly known as Alloy 718 (UNS N07718 / "Inconel 718") supplied as bars, forgings, flash‑welded rings and forging stock. It covers allowable sizes, melting routes (consumable electrode or VIM), required solution and aging heat treatments, and acceptance tests for chemical composition and mechanical properties.

General information

• Status: Active specification (revised, current revision P issued in 2022).
• Publication date: August 19, 2022 (AMS5663P revision).
• Publisher: SAE International (SAE AMS — Aerospace Material Specification).
• ICS / categories: Metallurgy / Non‑ferrous metals and products (ICS 77.120 / 77.150 — nickel and non‑ferrous metal products).
• Edition / version: AMS5663P (Revision P, 2022).
• Number of pages: 10 pages (material specification document).

Scope

This specification applies to a corrosion‑ and heat‑resistant nickel‑based precipitation‑hardening alloy (commonly called Alloy 718 / UNS N07718) in the forms of bars, forgings, and flash‑welded rings and to forging stock used to produce forgings or rings. Product size limits for supplied bars/forgings are specified (product limited to nominal diameters or maximum cross‑sectional dimensions up to 10.00 in / 254 mm, with stock for forging of any size permitted). The document prescribes melting practice (consumable electrode or vacuum induction melting), required solution and precipitation heat‑treat cycles (solution and aging, reference 1775 °F / 968 °C condition), chemical composition ranges and mechanical/property acceptance criteria.

Key topics and requirements

• Chemical composition and limits consistent with Alloy 718 (Ni ~50–55%, Cr ~17–21%, Nb ~4.75–5.50, Mo ~2.8–3.3, Ti and Al controlled for γ′/γ″ strengthening).
• Permitted melting routes: consumable‑electrode melting or vacuum induction melting (VIM) with controls on impurities and inclusion content.
• Specified heat treatment: solution treatment and precipitation (age) hardening to achieve required strength/ductility; typical solution/age temperature references (documented schedules and acceptance tests).
• Dimensional/size limits and product forms (bars, forgings, flash‑welded rings; stock for forging).
• Mechanical property and acceptance testing: tensile, hardness, and often supplemental tests (chemical analysis, microstructure checks, and mill test reports / MTRs).
• Marking, certification and traceability requirements (material certifications / MTRs required to demonstrate conformance).

Typical use and users

Alloy 718 per AMS5663P is used where high strength, good fatigue/creep resistance and corrosion resistance are required across cryogenic to elevated temperatures — e.g., jet engine and gas‑turbine components, structural and rotating parts, fasteners, pump and valve components, and downhole/oil & gas hardware. Typical users include aerospace and defense primes and subcontractors, turbine and engine manufacturers, forgings and specialty‑alloy mill producers, metallurgical engineers, and procurement/specification specialists.

Related standards

Commonly referenced / related documents include ASTM specifications for precipitation‑hardening nickel alloys (e.g., ASTM B637 for bars/rod), other AMS documents for nickel alloy forms and processing (AMS5662, AMS5664 and related AMS/ASTM material specifications), and UNS designation N07718 for Alloy 718. Users often cross‑reference AMS5663 with ASTM B637 and other AMS material specifications when specifying forms, testing and acceptance.

Keywords

AMS5663P, SAE AMS, Alloy 718, Inconel 718, UNS N07718, nickel alloy, precipitation‑hardening, solution and precipitation heat treatment, bars, forgings, rings, vacuum induction melting (VIM), consumable electrode melting, aerospace material specification.

FAQ

Q: What is this standard?

A: AMS5663P is an SAE Aerospace Material Specification covering a precipitation‑hardening nickel‑chromium alloy (commonly Alloy 718 / UNS N07718) supplied as bars, forgings, rings and forging stock; it sets composition, processing and acceptance requirements.

Q: What does it cover?

A: It covers allowable chemical composition, permitted melting routes (consumable electrode or VIM), solution and precipitation heat treatment requirements, size/form limits (bars/forgings/flash‑welded rings and stock for forging), and the mechanical and chemical acceptance tests and certification required for delivered material.

Q: Who typically uses it?

A: Aerospace and defense OEMs and suppliers, turbine and engine manufacturers, forging houses and specialty alloy mills, materials engineers, quality and procurement professionals who specify or supply Alloy 718 in forgings, bars or ring forms.

Q: Is it current or superseded?

A: The current revision is AMS5663P (revision P) issued August 19, 2022. Users should check SAE Mobilus or the issuing body for any subsequent revisions or amendments after that date.

Q: Is it part of a series?

A: Yes — AMS5663 is part of the AMS family of aerospace material specifications for nickel‑base precipitation‑hardening alloys; related AMS and ASTM documents address other forms, processing routes and complementary test methods (for example AMS5662/5664 and ASTM B637 for related product forms).

Q: What are the key keywords?

A: Alloy 718, Inconel 718, UNS N07718, precipitation hardening, solution + age heat treatment, bars, forgings, rings, AMS5663P, SAE AMS, nickel‑chromium‑niobium alloy.