AMS Specification Heat Treatment Controls & Processes

AMS 2774

Heat Treatment Wrought Nickel Alloy & Cobalt Alloy Parts

Heat Treatment of Wrought Nickel Alloy and Cobalt Alloy Parts – Solution, Stabilization, and Precipitation/Age Hardening Heat Treatment per SAE Aerospace Material Specification

AS9100D / ISO 9001

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Quick Specification Facts

Spec Number AMS 2774 (AMS2774)

Material Wrought Nickel Alloy and Cobalt Alloy Parts

Spec Type AMS (Aerospace Material Specification) – Controls & Processes

Category Controls & Processes / Heat Treatment

Spec Covers Heat Treatment of Wrought Nickel Alloy and Cobalt Alloy Parts

Treatment Types Solution Heat Treatment, Stabilization Treatment, Precipitation / Age Hardening

Applicable To Wrought Nickel Alloy and Cobalt Alloy Parts and Components

Issuing Body SAE International

Certification AS9100D / ISO 9001 with full MTR traceability

Specification Overview

AMS 2774 (also referenced as AMS2774) is an SAE International Aerospace Material Specification covering the heat treatment of wrought nickel alloy and cobalt alloy parts. As a process specification—classified under Controls & Processes—AMS 2774 establishes the requirements for heat treatment cycles applied to wrought nickel-based and cobalt-based superalloy components used in aerospace, defense, and high-temperature industrial applications. The specification defines procedures for solution heat treatment, stabilization treatment, and precipitation (age) hardening to develop the required mechanical properties in finished parts.

AMS 2774 is widely referenced in conjunction with material specifications such as AMS 5706, AMS 5707, AMS 5708, AMS 5709 (Waspaloy), and numerous other nickel and cobalt alloy AMS specs. Compliance with AMS 2774 heat treatment requirements is typically mandated for critical aerospace turbine engine components, structural parts, and other applications where precise thermal processing is necessary to achieve the specified microstructure and mechanical properties. Aero-Vac supplies AMS 2774-compliant material with full documentation, mill test reports, and AS9100D-certified quality assurance.

Applicable Material Forms

Bars

Forgings

Rings

Billets

Machined Parts

Wrought Components

AMS 2774 applies to wrought nickel alloy and cobalt alloy parts in all product forms including bars, forgings, rings, billets, and finished machined components. The heat treatment processes defined within AMS 2774 are applied to ensure that wrought nickel and cobalt alloy parts achieve the required mechanical properties for demanding aerospace and high-temperature service environments. Contact our materials specialists to discuss heat treatment requirements for your specific components.

Heat Treatment Types Covered by AMS 2774

Treatment Type	Purpose	Typical Application	Notes
Solution Heat Treatment	Dissolve secondary phases; homogenize microstructure	Initial processing of nickel/cobalt alloy parts	Followed by rapid quench to retain solid solution
Stabilization Treatment	Stabilize microstructure prior to aging; reduce residual stress	Intermediate step between solution and precipitation treatment	Improves dimensional stability and stress-rupture properties
Precipitation / Age Hardening	Develop gamma-prime (γ') precipitates for high-temperature strength	Final heat treatment for turbine engine components	Controls size and distribution of strengthening precipitates
Stress Relief	Reduce residual stresses from forming or machining operations	Post-fabrication treatment of wrought parts	Performed at sub-solvus temperatures

Specific temperature ranges, hold times, heating rates, and cooling requirements are defined within the current issue of AMS 2774. Consult the specification directly for precise process parameters. Aero-Vac provides full mill test reports (MTRs) and certificates of conformance confirming heat treatment compliance for every order.

Key Properties & Specification Details

Property / Attribute	Details
Specification Number	AMS 2774 (AMS2774)
Issuing Organization	SAE International (Society of Automotive Engineers)
Specification Type	Controls & Processes – Heat Treatment Process Specification
Applicable Materials	Wrought Nickel Alloy and Cobalt Alloy Parts
Heat Treatment Processes Covered	Solution Heat Treatment, Stabilization Treatment, Precipitation/Age Hardening, Stress Relief
Purpose	Establish requirements for heat treatment cycles to develop required microstructure and mechanical properties in wrought nickel and cobalt alloy components
Temperature Control	Precise temperature uniformity requirements for furnace qualification and process control
Atmosphere Requirements	Defines acceptable furnace atmospheres to prevent surface contamination and intergranular attack
Quench Requirements	Specifies quench media, quench delay, and cooling rate requirements following solution treatment
Documentation Required	Heat treatment records, furnace charts, thermocouple calibration records, load documentation
Weldability	Heat treatment per AMS 2774 is often required post-welding of nickel and cobalt alloy components
Certification Available	AS9100D / ISO 9001, Certificate of Conformance, MTR

Typical Applications

Aerospace Turbine Engine Components: Heat treatment per AMS 2774 is required for critical nickel and cobalt alloy turbine discs, rings, blades, vanes, and compressor components where precise microstructure and mechanical properties are essential for safe, reliable operation at elevated temperatures.

Gas Turbine Hot Section Parts: Wrought nickel and cobalt alloy parts used in combustion hardware, nozzle guide vanes, turbine shrouds, and other hot section components requiring AMS 2774-compliant heat treatment to achieve the required creep and oxidation resistance properties.

Aerospace Structural Forgings and Bars: Forged and bar stock nickel and cobalt alloy components for aerospace structural applications where AMS 2774 heat treatment is specified to develop optimal strength, ductility, and fatigue resistance at operating temperatures.

High-Temperature Industrial Components: Industrial gas turbine parts, petrochemical processing hardware, furnace fixtures, and other high-temperature applications utilizing wrought nickel and cobalt alloys that require controlled heat treatment per AMS 2774.

Defense & Space Applications: Missile components, rocket propulsion hardware, and defense system parts fabricated from wrought nickel or cobalt alloys requiring AMS 2774-compliant heat treatment to meet demanding mechanical property and reliability requirements.

Frequently Asked Questions – AMS 2774

What is AMS 2774 and what does it cover?

AMS 2774 (also written AMS2774) is an SAE International aerospace material specification covering the heat treatment of wrought nickel alloy and cobalt alloy parts. Classified as a Controls & Processes specification, AMS 2774 establishes the requirements for solution heat treatment, stabilization treatment, and precipitation (age) hardening of wrought nickel-based and cobalt-based superalloy components. The specification defines process parameters including temperature ranges, hold times, heating rates, cooling methods, and atmosphere requirements to ensure parts achieve the required microstructure and mechanical properties for demanding aerospace applications.

What types of heat treatment does AMS 2774 cover?

AMS 2774 covers multiple heat treatment processes for wrought nickel and cobalt alloy parts, including: Solution Heat Treatment, which dissolves secondary phases and homogenizes the microstructure prior to quenching; Stabilization Treatment, which stabilizes the microstructure and reduces residual stresses before aging; Precipitation/Age Hardening, which develops the gamma-prime (γ') precipitate phases responsible for high-temperature strength; and Stress Relief treatments. The specification provides detailed requirements for furnace qualification, temperature uniformity, atmosphere control, quench media, cooling rates, and process documentation to ensure consistent, repeatable results.

Does Aero-Vac supply AMS 2774 material with full mill test reports and certifications?

Yes. All material supplied by Aero-Vac that references AMS 2774 heat treatment requirements is fully traceable to mill test reports (MTRs) confirming chemical composition, mechanical properties, and heat treatment compliance per the specification. We are AS9100D/ISO 9001 certified with a 99.6% quality rating. Every order ships with certificates of conformance, material certifications, and chemical/mechanical test reports including heat treatment records. Electronic delivery of all documentation is available for fast turnaround. If your program requires additional special process certifications or heat treatment documentation, our quality team can coordinate as needed.

Which nickel and cobalt alloy specifications reference AMS 2774?

AMS 2774 is referenced by numerous nickel alloy and cobalt alloy AMS material specifications as the governing heat treatment process specification. Common examples include AMS 5706, AMS 5707, AMS 5708, and AMS 5709 (Waspaloy bars and forgings), as well as many other nickel superalloy and cobalt superalloy specifications covering materials such as Inconel, Rene alloys, Hastelloy, and various other precipitation-hardenable nickel and cobalt alloys. When a material specification calls for heat treatment "per AMS 2774," the processor must follow the temperature, time, atmosphere, and cooling requirements defined in AMS 2774 for the applicable alloy group.

What are the typical lead times for AMS 2774-compliant material from Aero-Vac?

In-stock nickel and cobalt alloy material with AMS 2774-compliant heat treatment is typically available for same-day or next-day shipment. For custom-cut or specially processed orders, our standard lead time is 2–4 weeks—significantly faster than the industry average of 8–12 weeks. Items requiring additional processing, heat treatment, or testing may require 4–8 weeks depending on quantity, dimensions, and processing requirements. We prioritize urgent aerospace and defense requirements and will always provide honest, upfront delivery estimates. Rush processing is available on select items. Contact us with your specific requirements for a prompt availability and lead time quote.

Can Aero-Vac provide value-added processing for AMS 2774-compliant nickel and cobalt alloy material?

Yes. Aero-Vac operates a complete in-house processing facility at our Port of Kalama location. For nickel and cobalt alloy material requiring AMS 2774-compliant heat treatment, we offer precision saw cutting, surface grinding, turning, milling, and heat treatment services. We also provide comprehensive mechanical and non-destructive testing services in-house, including hardness testing, tensile testing, and dimensional inspection. Having all capabilities under one roof allows for faster turnaround, tighter quality control, and reduced overall cost compared to using multiple vendors. Our experienced team understands the demanding nature of nickel and cobalt superalloys and the critical importance of precise heat treatment compliance for aerospace applications. Contact us to discuss your specific AMS 2774 processing requirements.

Need AMS 2774 material or a custom quote?

Our nickel and cobalt alloy specialists can provide fast pricing, availability, and technical guidance for your AMS 2774-compliant heat treatment requirements.