SAE AMS2662A-2025 PDF

Full title and description

SAE AMS2662A — Brazing, Gold‑Nickel Alloy Filler Metal. This aerospace material specification defines the engineering requirements for producing brazed joints in parts made of steels, iron alloys, nickel alloys and cobalt alloys using a gold‑nickel alloy filler metal; it covers filler‑metal composition and form, thermal and flow characteristics, recommended brazing practice and acceptance/inspection requirements.

Abstract

AMS2662A specifies the properties and production/acceptance criteria for gold‑nickel brazing filler metals intended for use on a broad range of ferrous and non‑ferrous aerospace alloys. The standard addresses material chemistry and physical characteristics, recommended brazing temperature ranges and joint clearances, basics of surface preparation and fluxing or atmosphere requirements, marking/identification, and the tests and inspection criteria required to accept brazed filler‑metal material and assemblies. The document is a focused material specification (short technical standard) intended to ensure consistent performance of gold‑nickel filler metals in aerospace brazing applications.

General information

• Status: Revised (current revision AMS2662A).
• Publication date: Revised July 16, 2025 (AMS2662A). The original AMS2662 was issued November 1998 and reaffirmed November 4, 2019.
• Publisher: SAE International (SAE/MS Mobilus product code AMS2662A).
• ICS / categories: Aerospace material specification; brazing/filler metals; joining and heat‑processes; metallurgy and alloys.
• Edition / version: AMS2662A (2025 revision A).
• Number of pages: 8 pages (material specification length).

Scope

This specification covers gold‑nickel alloy filler metals used to produce brazed joints in components fabricated from steels, iron alloys, nickel alloys and cobalt alloys. It defines the filler‑metal form(s) and identification, chemical and physical requirements, brazing temperature/flow characteristics, handling/packaging and the tests/inspection needed for acceptance. The scope is limited to filler‑metal material specification and does not replace customer‑specific joint design or full assembly process specifications unless referenced.

Key topics and requirements

• Defined filler‑metal chemistry and limits for gold‑nickel alloy(s) intended for brazing use.
• Physical characteristics: melting/solidus‑liquidus behavior and recommended brazing temperature ranges and joint clearances for reliable capillary flow.
• Surface preparation, fluxing or controlled‑atmosphere guidance and cleanliness requirements for successful brazing.
• Identification, marking and packaging requirements to ensure traceability of filler‑metal lots.
• Required test methods and acceptance criteria (chemical verification, melting behavior, and other material acceptance tests typical for AMS material specs).
• Compatibility guidance with common aerospace base alloys (steels, Ni‑based and Co‑based alloys) and notes on post‑brazing handling/heat treatment where applicable.

Typical use and users

Used by aerospace manufacturers, repair and overhaul facilities, metallurgists, brazing shops and quality/inspection engineers specifying or procuring filler metals for controlled brazing of engine, airframe and auxiliary components. Typical applications include brazed joints in gas‑turbine components, heat exchangers, fuel system fittings and other assemblies where gold‑nickel fillers are selected for metallurgical compatibility, corrosion resistance or specific flow characteristics.

Related standards

Related AMS and SAE joining/material standards commonly used alongside AMS2662A include AMS2675 (nickel alloy brazing filler metals), AMS2663 (silver brazing filler metals) and AMS3411 (brazing flux specifications); AMS process and pyrometry standards (e.g., AMS2750) and other AMS filler‑metal specifications may also be referenced depending on application.

Keywords

brazing, gold‑nickel, filler metal, AMS2662A, SAE, aerospace material specification, brazed joints, filler chemistry, melting range, joint clearance, flux, brazing inspection

FAQ

Q: What is this standard?

A: SAE AMS2662A is an aerospace material specification that defines requirements for gold‑nickel alloy filler metals used in brazing applications. It is a focused material/filler‑metal specification rather than a full process procedure.

Q: What does it cover?

A: It covers filler‑metal chemistry and physical characteristics, recommended brazing temperature/flow behavior, handling, marking/traceability, and tests/acceptance criteria for gold‑nickel brazing filler metals used with steels, nickel and cobalt base alloys.

Q: Who typically uses it?

A: Aerospace OEMs, MRO (maintenance/repair/overhaul) shops, brazing specialists, procurement and quality engineers who specify, buy or inspect filler metals for brazing applications.

Q: Is it current or superseded?

A: AMS2662A is the revised (current) edition published July 16, 2025; it replaces or updates the prior AMS2662 editions (original issued 1998, reaffirmed 2019). Check the issuing body for the absolute latest status at time of procurement.

Q: Is it part of a series?

A: Yes — it is part of the AMS family of material specifications covering brazing and filler metals; related AMS filler‑metal and brazing documents (e.g., AMS2675 for nickel filler metals, AMS2663 for silver filler metals, AMS3411 for flux) are commonly used together.

Q: What are the key keywords?

A: brazing; gold‑nickel; filler metal; AMS2662A; SAE; aerospace; brazed joint; melting range; filler chemistry; flux; inspection.