AMS Specification 7075 Aluminum Alloy Aluminum

AMS 4045

7075 Aluminum Alloy – Sheets and Plate

Aluminum Alloy, Sheets and Plate
5.6Zn – 2.5Mg – 1.6Cu – 0.23Cr | 7075-T6 / 7075-T651 | Solution and Precipitation Heat Treated

AS9100D / ISO 9001

Mill Test Reports

2–4 Week Delivery

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Quick Specification Facts

Spec Number AMS 4045 (AMS4045)

Material 7075 Aluminum Alloy

Spec Type AMS (Aerospace Material Specification)

Category 7075 Aluminum Alloy

Composition 5.6Zn – 2.5Mg – 1.6Cu – 0.23Cr

Condition 7075-T6 / T651, Solution and Precipitation Heat Treated

Product Forms Sheets, Plate

Certification AS9100D / ISO 9001 with full MTR traceability

Specification Overview

AMS 4045 (also referenced as AMS4045) covers 7075 aluminum alloy in the form of sheets and plate in the solution and precipitation heat treated condition (T6 and T651 temper). This specification is issued by SAE International and conforms to ASTM B209. It is widely used in aerospace, defense, and high-performance structural applications requiring the highest strength-to-weight ratio available in aluminum alloys.

The nominal composition of 5.6% Zinc, 2.5% Magnesium, 1.6% Copper, and 0.23% Chromium gives 7075 aluminum its exceptional strength characteristics. The T6 temper (solution heat treated and artificially aged) and T651 temper (stress-relieved by stretching) deliver tensile strengths comparable to many structural steels at a fraction of the weight, making AMS 4045 a go-to material for aircraft structural components, wing skins, fuselage frames, and high-stress tooling applications.

Available Product Forms

Sheet

Plate

All product forms are supplied in the Solution and Precipitation Heat Treated condition (T6 / T651) per AMS 4045 and ASTM B209 requirements. Custom sizes, thicknesses, and cut-to-size blanks are available upon request. Contact our materials specialists for non-standard dimensions.

Nominal Chemical Composition

Element	Symbol	Nominal %	Notes
Zinc	Zn	5.6% (5.1–6.1%)	Primary strengthening element
Magnesium	Mg	2.5% (2.1–2.9%)	Contributes to precipitation hardening
Copper	Cu	1.6% (1.2–2.0%)	Enhances strength and hardness
Chromium	Cr	0.23% (0.18–0.28%)	Improves corrosion resistance and stress-corrosion cracking resistance
Aluminum	Al	Balance	Base metal
Iron	Fe	0.50% max	Controlled impurity
Silicon	Si	0.40% max	Controlled impurity
Manganese	Mn	0.30% max	Controlled impurity

Chemical composition ranges are nominal. Consult the current issue of AMS 4045 and ASTM B209 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 4045 (AMS4045)
Issuing Organization	SAE International (Society of Automotive Engineers)
Cross Reference Standard	ASTM B209
Material Type	High-Strength Aluminum Alloy
Alloy Grade	7075 (UNS A97075)
Nominal Composition	5.6Zn – 2.5Mg – 1.6Cu – 0.23Cr
Temper / Condition	T6 and T651 – Solution and Precipitation Heat Treated
Available Forms	Sheets, Plate
Tensile Strength (typical)	83 ksi (572 MPa) min
Yield Strength (typical)	73 ksi (503 MPa) min
Density	0.101 lb/in³ (2.80 g/cm³)
Machinability	Excellent – one of the most machinable aluminum alloys
Weldability	Limited – generally not recommended for structural fusion welding
Corrosion Resistance	Moderate – often anodized or clad for improved protection
Certification Available	AS9100D / ISO 9001, Certificate of Conformance, MTR

Typical Applications

Aerospace & Defense: Aircraft wing skins, fuselage frames, bulkheads, spars, ribs, and structural panels requiring the highest strength-to-weight ratio. A primary structural alloy in commercial and military aircraft programs.

Tooling & Fixture Plates: Precision machined tooling plates, jigs, fixtures, and mold bases where dimensional stability, machinability, and high strength are required.

Military & Defense: Armor plate, military vehicle components, weapons systems, and equipment housings requiring high strength at low weight in demanding operational environments.

High-Performance Industrial: Structural components in transportation, marine, and automotive racing applications where maximum strength and lightweight construction are critical.

Electronics & Semiconductor: Heat sinks, chassis, enclosures, and precision machined components for electronics, robotics, and semiconductor manufacturing equipment.

Frequently Asked Questions – AMS 4045

What is AMS 4045 and what does it cover?

AMS 4045 (also written AMS4045) is an SAE International aerospace material specification covering 7075 aluminum alloy in the form of sheets and plate supplied in the solution and precipitation heat treated condition (T6 and T651 temper), in accordance with ASTM B209. The nominal composition of 5.6% Zinc, 2.5% Magnesium, 1.6% Copper, and 0.23% Chromium delivers one of the highest strength-to-weight ratios available in aluminum alloys. It is widely used in aerospace, defense, military, and high-performance structural applications where maximum strength at minimum weight is essential.

What is the difference between 7075-T6 and 7075-T651?

Both 7075-T6 and 7075-T651 are covered by AMS 4045 and undergo solution heat treatment followed by artificial aging (precipitation heat treatment). The key difference is stress relief: T6 refers to sheet material that is not stress-relieved after heat treatment, while T651 designates plate material that has been stress-relieved by controlled stretching (approximately 1–3% permanent set). The T651 temper results in improved dimensional stability during machining and is preferred for precision plate applications where residual stress must be minimized. For most structural applications, both tempers provide equivalent mechanical properties.

Does Aero-Vac supply AMS 4045 with full mill test reports and certifications?

Yes. All AMS 4045 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 forms and sizes of AMS 4045 does Aero-Vac stock?

Aero-Vac maintains inventory of AMS 4045 in both sheet and plate form across a range of standard thicknesses and dimensions. We can provide custom-cut blanks, precision-sawn sections, and specific size requirements from our in-house processing facility at the Port of Kalama. For non-standard dimensions or special orders, our team can source from our global supplier network. Contact us with your specific thickness, width, length, and quantity requirements and we will provide a prompt quote with availability and lead time.

What are the typical lead times for AMS 4045 material?

In-stock AMS 4045 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 non-standard sizes may require 4–8 weeks depending on quantity and availability. 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 4045 material?

Yes. Aero-Vac operates a complete in-house processing facility at our Port of Kalama location. For AMS 4045 aluminum sheet and plate, we offer precision saw cutting (including blanks and custom shapes), surface grinding, milling, trepanning, and turning. We also provide comprehensive mechanical and non-destructive testing services in-house. Having all capabilities under one roof allows for faster turnaround, tighter quality control, and reduced overall cost compared to using multiple vendors. Contact us to discuss your specific processing requirements.

Need AMS 4045 material or a custom quote?

Our aluminum specialists can provide fast pricing, availability, and technical guidance for your AMS 4045 / 7075 aluminum alloy requirements.