AMS Specification 7050 Aluminum Alloy 7050 Series

AMS 4050

7050 Aluminum Alloy – High Strength Aerospace Plate

Aluminum Alloy Plate 6.2Zn – 2.3Cu – 2.2Mg – 0.12Zr (7050-T7451)
Solution Heat Treated, Stress Relieved, and Overaged

AS9100D / ISO 9001

Mill Test Reports

2–4 Week Delivery

877-237-6822

Quick Specification Facts

Spec Number AMS 4050 (AMS4050)

Material 7050 Aluminum Alloy

Spec Type AMS (Aerospace Material Specification)

Category 7050 Aluminum Alloy

Composition 6.2Zn – 2.3Cu – 2.2Mg – 0.12Zr

Temper T7451 – Solution Heat Treated, Stress Relieved, Overaged

Product Forms Plate

Certification AS9100D / ISO 9001 with full MTR traceability

Specification Overview

AMS 4050 (also referenced as AMS4050) covers 7050 aluminum alloy plate in the T7451 temper condition – solution heat treated, stress relieved by stretching, and overaged. This specification is issued by SAE International and is widely used in aerospace, aircraft, and military applications requiring an outstanding combination of high strength, fracture toughness, and resistance to stress corrosion cracking.

Aluminum alloy 7050 is a popular alloy for aerospace/aircraft and military applications. Known for high strength, toughness, and corrosion resistance, it can withstand extreme temperatures and harsh environments. AMS 4050 is particularly suited for heavy plate applications, making it a top choice for aircraft components such as fuselage panels, bulkheads, and wings. Because of its high strength-to-weight ratio, aluminum alloy 7050 lowers operating costs and increases fuel efficiency.

Available Product Forms

Plate

AMS 4050 material is supplied in the T7451 (Solution Heat Treated, Stress Relieved, and Overaged) condition. Plate is available in a wide range of thicknesses and widths to meet heavy-section aerospace requirements. Custom-cut sizes, discs, and blocks are available upon request. Contact our materials specialists for non-standard dimensions.

Nominal Chemical Composition

Element	Symbol	Nominal %	Notes
Zinc	Zn	6.2% (5.7–6.7)	Primary strengthening element
Copper	Cu	2.3% (2.0–2.6)	Enhances strength and toughness
Magnesium	Mg	2.2% (1.9–2.6)	Solid solution strengthener
Zirconium	Zr	0.12% (0.08–0.15)	Inhibits recrystallization; improves toughness
Aluminum	Al	Balance	Base metal
Silicon	Si	0.12% max	Impurity limit
Iron	Fe	0.15% max	Impurity limit

Chemical composition ranges are nominal. Consult the current issue of AMS 4050 for precise minimum/maximum requirements. Aero-Vac provides full mill test reports (MTRs) with certified chemistry for every order.

Key Properties & Specification Details

Property / Attribute	Details
Specification Number	AMS 4050 (AMS4050)
Issuing Organization	SAE International (Society of Automotive Engineers)
Material Type	High-Strength Aluminum Alloy Plate
Alloy Grade	7050 (UNS A97050)
Nominal Composition	6.2Zn – 2.3Cu – 2.2Mg – 0.12Zr
Temper / Condition	T7451 – Solution Heat Treated, Stress Relieved by Stretching, Overaged
Available Forms	Plate
Density	0.102 lb/in³ (2.82 g/cm³)
Tensile Strength (typical)	High – suitable for primary structural aerospace applications
Corrosion Resistance	Good – T7451 temper provides enhanced stress corrosion cracking resistance
Fracture Toughness	Excellent – superior to many other high-strength aluminum alloys
Weldability	Limited – not typically recommended for fusion welding
Machinability	Good – suitable for precision machined aerospace components
Certification Available	AS9100D / ISO 9001, Certificate of Conformance, MTR

Typical Applications

Aircraft Structural Components: Fuselage panels, bulkheads, wing spars, and primary structural members where a high strength-to-weight ratio is critical for performance and fuel efficiency.

Military & Defense: Military aircraft frames, armored vehicle components, and defense structures requiring outstanding toughness and resistance to fatigue in demanding operational environments.

Heavy Plate Applications: Large structural plates for aerospace assemblies, tooling plates, jigs and fixtures, and machined aerospace parts requiring tight dimensional tolerances and low residual stress.

Space & Launch Vehicles: Structural components for launch vehicles, satellite structures, and space exploration hardware requiring lightweight, high-strength materials capable of withstanding extreme environments.

Machined Aerospace Parts: Complex machined components including ribs, frames, floor beams, and brackets that benefit from 7050's superior machinability and stable, stress-relieved condition.

Frequently Asked Questions – AMS 4050

What is AMS 4050 and what does it cover?

AMS 4050 (also written AMS4050) is an SAE International aerospace material specification covering 7050 aluminum alloy plate in the T7451 temper condition – solution heat treated, stress relieved by stretching, and overaged. The nominal chemistry of 6.2% Zinc, 2.3% Copper, 2.2% Magnesium, and 0.12% Zirconium delivers an outstanding combination of high strength, fracture toughness, and resistance to stress corrosion cracking. It is widely used in aerospace, aircraft, and military applications for primary structural components such as fuselage panels, bulkheads, and wing structures.

What does the T7451 temper designation mean for AMS 4050?

The T7451 temper designation indicates that the material has undergone three key processing steps: (1) Solution Heat Treatment – the alloy is heated to a high temperature to dissolve alloying elements into solid solution; (2) Stress Relief by Stretching – the plate is stretched a controlled amount (typically 1.5–3%) to relieve residual stresses introduced during quenching, resulting in improved dimensional stability during machining; (3) Overaging – an artificial aging treatment beyond the peak strength condition to enhance corrosion resistance and fracture toughness, particularly stress corrosion cracking resistance. This combination makes T7451 the preferred temper for heavy plate aerospace applications where dimensional stability and corrosion resistance are critical.

Does Aero-Vac supply AMS 4050 with full mill test reports and certifications?

Yes. All AMS 4050 material supplied by Aero-Vac is fully traceable to mill test reports (MTRs) confirming chemical composition and mechanical properties 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. Electronic delivery of all documentation is available for fast turnaround. If your program requires additional special process certifications, our quality team can coordinate as needed.

What sizes and thicknesses of AMS 4050 plate does Aero-Vac stock?

Aero-Vac maintains inventory of AMS 4050 plate in a range of thicknesses, widths, and lengths suitable for heavy aerospace structural applications. We can provide custom-cut sizes, discs, blocks, and near-net-shape pieces from our in-house processing facility at the Port of Kalama. For non-standard dimensions or very large plate requirements, our team can source from our global supplier network. Contact us with your specific size requirements and we will provide a prompt quote with availability and lead time.

What are the typical lead times for AMS 4050 material?

In-stock AMS 4050 material 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. Specialty or large-format plate items requiring mill production may require 4–8 weeks depending on quantity and dimensions. We prioritize urgent aerospace and defense requirements and will always provide honest, upfront delivery estimates. Rush processing is available on select items.

Can Aero-Vac provide value-added processing for AMS 4050 material?

Yes. Aero-Vac operates a complete in-house processing facility at our Port of Kalama location. For AMS 4050 aluminum plate, we offer precision saw cutting (including disc and block cutting), surface grinding, trepanning, turning, and milling. We also provide comprehensive mechanical and non-destructive testing services in-house. The stress-relieved T7451 condition of 7050 aluminum makes it particularly well-suited for precision machining with minimal distortion, and our team can assist in optimizing the cut plan to minimize material waste. Having all capabilities under one roof allows for faster turnaround, tighter quality control, and reduced overall cost. Contact us to discuss your specific processing requirements.

Need AMS 4050 material or a custom quote?

Our aluminum specialists can provide fast pricing, availability, and technical guidance for your AMS 4050 / 7050 aluminum alloy requirements.