Boeing Material Specification 2324 Aluminum Alloy Aluminum Plate

BMS 7-254

2324 Aluminum Alloy – Plate

High Strength Aluminum Alloy Plate – 2324-T39/T351 Al-Cu-Mg Alloy – per Boeing Material Specification BMS-7-254 – Aircraft Quality Aluminum Plate for Aerospace Structural Applications

AS9100D / ISO 9001

Mill Test Reports

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Quick Specification Facts

Spec Number BMS-7-254

Material 2324 Aluminum Alloy Plate

Spec Type Boeing Material Specification (BMS)

Category Aluminum / 2324

Composition Al-Cu-Mg (3.8–4.9Cu, 1.2–1.8Mg, 0.3–0.9Mn)

Also Known As 2324-T39, 2324-T351 Aluminum Plate

Product Forms Plate

Temper T39, T351

Certification AS9100D / ISO 9001 with full MTR traceability

Specification Overview

BMS-7-254 is a Boeing Material Specification covering 2324 aluminum alloy in plate form. 2324 is a high-strength Al-Cu-Mg (aluminum-copper-magnesium) alloy developed specifically for aerospace structural applications where superior strength, fracture toughness, and fatigue resistance are required. The alloy features tighter compositional controls compared to the standard 2024 alloy, resulting in improved fracture toughness and resistance to fatigue crack growth—properties that are critical for lower wing skin and fuselage panel applications in commercial and military aircraft.

2324 aluminum alloy plate per BMS-7-254 is typically supplied in the T39 or T351 temper, which provides an optimized combination of tensile strength, yield strength, and fracture toughness. The T39 temper is a controlled stretch temper that provides higher strength with good toughness characteristics. This specification is widely used throughout commercial and military aerospace programs requiring certified, traceable aluminum plate with consistent, repeatable mechanical properties. Aero-Vac supplies BMS-7-254 2324 aluminum plate with full mill test reports, certificates of conformance, and AS9100D/ISO 9001 certification.

Available Product Forms

Plate

BMS-7-254 material is supplied as Plate per specification requirements. 2324 aluminum plate is available in a range of thicknesses, widths, and lengths to suit aerospace structural applications. Custom-cut plate, precision-sawn blanks, and close-tolerance plate are available upon request. Contact our materials specialists for non-standard dimensions or special processing requirements.

Nominal Chemical Composition

Element	Symbol	Nominal %	Notes
Copper	Cu	3.8–4.9%	Primary strengthening element; enables precipitation hardening
Magnesium	Mg	1.2–1.8%	Enhances strength through solid solution and precipitation hardening
Manganese	Mn	0.30–0.9%	Improves strength and corrosion resistance; refines grain structure
Silicon	Si	0.10% max	Controlled to low levels for improved fracture toughness
Iron	Fe	0.12% max	Controlled to low levels to maximize fracture toughness and fatigue resistance
Chromium	Cr	0.05% max	Controlled to low levels
Zinc	Zn	0.25% max	Residual element; controlled for consistency
Titanium	Ti	0.15% max	Grain refiner; added for microstructure control
Aluminum	Al	Balance	Base metal

Chemical composition ranges are nominal. Consult the current issue of BMS-7-254 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	BMS-7-254
Issuing Organization	Boeing Commercial Airplanes (Boeing Material Specification)
Material Type	2324 Aluminum Alloy Plate – High Strength Al-Cu-Mg Alloy
Alloy Name	2324 Aluminum (also known as 2324-T39, 2324-T351)
Nominal Composition	Al-Cu-Mg: 3.8–4.9% Cu, 1.2–1.8% Mg, 0.30–0.9% Mn
Available Forms	Plate
Typical Tempers	T39, T351
Tensile Strength	High – superior tensile and yield strength compared to standard 2024; optimized for aerospace structural applications
Fracture Toughness	Excellent – tighter Fe and Si controls versus 2024 result in improved fracture toughness and fatigue crack growth resistance
Machinability	Good – machines well with proper tooling and cutting parameters standard for aluminum alloys
Corrosion Resistance	Moderate – clad or anodized surface treatments recommended for corrosion-sensitive environments
Weldability	Limited – not generally recommended for fusion welding; mechanical fastening preferred in aerospace structures
Density	~2.78 g/cm³ (0.100 lb/in³)
Certification Available	AS9100D / ISO 9001, Certificate of Conformance, MTR

Typical Applications

Lower Wing Skins & Wing Covers: 2324 aluminum plate per BMS-7-254 is widely used for lower wing skin panels on commercial and military aircraft, where the combination of high tensile strength, superior fracture toughness, and fatigue crack growth resistance are critical for structural integrity and damage tolerance compliance.

Fuselage Structural Panels: Primary and secondary fuselage skin panels and structural components where high strength-to-weight ratio and fracture toughness performance are essential for meeting aerospace structural requirements and damage tolerance criteria.

Aerospace Structural Members: Longerons, stringers, frames, and other primary structural members requiring certified aluminum plate with consistent, traceable mechanical properties and full compliance to Boeing BMS-7-254 specification requirements.

Commercial & Military Aircraft Structures: Certified structural plate for Boeing commercial aircraft programs and military aircraft applications requiring high-performance aluminum alloy plate with full documentation, traceability, and compliance to BMS-7-254.

Machined Structural Parts & Blanks: Close-tolerance machined structural components, brackets, fittings, and blanks produced from BMS-7-254 compliant 2324 plate where dimensional accuracy and certified material properties are required.

Frequently Asked Questions – BMS-7-254

What is BMS-7-254 and what does it cover?

BMS-7-254 is a Boeing Material Specification covering 2324 aluminum alloy in plate form. 2324 is a high-strength Al-Cu-Mg alloy that is closely related to 2024 aluminum but produced with tighter controls on iron and silicon content to improve fracture toughness and fatigue crack growth resistance. The specification defines requirements for chemical composition, mechanical properties, temper, and testing to ensure consistent, reliable performance in aerospace structural applications. BMS-7-254 2324 aluminum plate is typically supplied in the T39 or T351 temper and is used extensively in commercial and military aircraft structural programs, particularly for lower wing skins and fuselage panels where damage tolerance is critical.

What is 2324 aluminum alloy and how does it differ from 2024?

2324 aluminum is an Al-Cu-Mg alloy that shares a similar base chemistry with the well-known 2024 alloy but is produced with significantly tighter controls on impurity elements—particularly iron (Fe ≤ 0.12%) and silicon (Si ≤ 0.10%), versus higher limits in standard 2024. These tighter controls reduce the formation of coarse intermetallic particles that act as crack initiation sites, resulting in significantly improved fracture toughness and fatigue crack growth resistance compared to standard 2024. The result is an alloy that is better suited for damage-tolerant design requirements in modern commercial and military aircraft structures. 2324 is typically supplied in the T39 or T351 temper, both of which provide high strength with enhanced toughness characteristics. For aerospace applications governed by BMS-7-254, 2324 plate offers a superior combination of strength and damage tolerance over standard 2024 plate.

Does Aero-Vac supply BMS-7-254 with full mill test reports and certifications?

Yes. All BMS-7-254 2324 aluminum plate 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 Boeing-specific or customer-specific documentation, our quality team can coordinate as needed to support your procurement requirements.

What sizes of BMS-7-254 2324 aluminum plate does Aero-Vac stock?

Aero-Vac maintains inventory of BMS-7-254 (2324 aluminum) plate across a range of thicknesses and dimensions. We stock standard plate sizes and can provide custom-cut blanks and close-tolerance plate from our in-house processing facility at the Port of Kalama. For special dimensions, thicknesses, or quantities, our team can source and coordinate production through our global supplier network. Contact us with your specific thickness, width, length, quantity, and required temper and we will provide a prompt quote with availability and lead time.

What are the typical lead times for BMS-7-254 2324 aluminum plate?

In-stock BMS-7-254 2324 aluminum plate 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 mill production may require 4–8 weeks depending on thickness, dimensions, and quantity. 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 requirement and we will give you a straight answer on availability.

Can Aero-Vac provide value-added processing for BMS-7-254 2324 aluminum plate?

Yes. Aero-Vac operates a complete in-house processing facility at our Port of Kalama location. For BMS-7-254 2324 aluminum plate, we offer precision saw cutting, surface grinding, milling, and custom-cut blank services. 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. Our team is experienced with the specific processing requirements of aerospace aluminum plate. Contact us to discuss your specific processing and testing requirements for BMS-7-254 material.

Need BMS-7-254 material or a custom quote?

Our aluminum specialists can provide fast pricing, availability, and technical guidance for your BMS-7-254 / 2324 aluminum plate requirements.