5154A Aluminum

Representative aluminum material photo; exact grade not verified

5154A Aluminum is an active registered wrought Al–Mg alloy in the 5000 series, designated AlMg3.5(A) in the former ISO cross-reference. Its 3.1–3.9% magnesium content provides useful solid-solution strengthening while retaining the corrosion resistance, weldability and cold-forming character associated with non-heat-treatable aluminum-magnesium sheet alloys. The A suffix is part of the alloy designation: 5154A has its own registered composition and should not be specified interchangeably with 5154, 5154B or 5154C. Final strength is developed principally by strain hardening rather than precipitation heat treatment.

Chemical Composition (wt.%)
Chemical Composition wt.%
Element	Min	Max
Silicon	—	0.50
Iron	—	0.50
Copper	—	0.10
Manganese	—	0.50
Magnesium	3.1	3.9
Chromium	—	0.25
Zinc	—	0.20
Titanium	—	0.20
Manganese + Chromium	0.10	0.50
Others, each	—	0.05
Others, total	—	0.15
Aluminum	Remainder

Composition notes

Manganese: Also subject to the combined Mn + Cr requirement.
Chromium: Also subject to the combined Mn + Cr requirement.
Manganese + Chromium: Combined composition restriction.
Others, each: Unspecified elements.
Others, total: Unspecified elements.

Registered wrought composition limits, percent by mass. In addition to the individual manganese and chromium limits, the registered composition requires Mn + Cr to be 0.10–0.50%. “Others” limits apply to unspecified individual and total elements; aluminum is the remainder.

The Aluminum Association lists calculated nominal density for the active wrought 5154A designation. Mechanical values depend on product form, thickness and strain-hardened temper and are not stated in the supplied registered-alloy source.

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Table of 5154A Aluminum Properties

Table of 5154A Aluminum Properties
Physical Properties	Metric
Density (calculated nominal)	2.67 × 10³ kg/m³2.67 g/cm³

Test conditions & data notes

Density (calculated nominal): Active wrought 5154A designation; calculated nominal density.

Material Conditions & Tempers

5154A is a non-heat-treatable wrought alloy. It is normally supplied in annealed or strain-hardened conditions; the selected temper should be stated together with the applicable product standard, thickness range and required mechanical properties. No temper-specific mechanical-property table was provided in the supplied source.

Condition	Description	Notes
O	Annealed condition, selected where maximum forming latitude and ductility are more important than strain-hardened strength.	Mechanical requirements depend on the applicable product specification and thickness.
H1x / H2x	Strain-hardened tempers used to obtain higher strength in sheet, strip or other wrought products; H2x denotes material that is strain hardened and then partially annealed.	Specify the complete temper designation and product standard when ordering.
H3x	Strain-hardened and stabilized tempers may be used where a stabilized condition is specified for the product.	Availability and mechanical requirements are product-standard dependent.

Advantages & Limitations

Advantages	Limitations
Moderate magnesium content gives higher inherent strength than lower-magnesium decorative and general-purpose 5xxx sheet alloys while retaining good formability. Non-heat-treatable Al–Mg metallurgy provides dependable resistance to many atmospheric, fresh-water and marine service environments when the alloy and fabrication details are properly selected. Good fusion-welding suitability makes the alloy practical for fabricated sheet assemblies and welded structures. Low calculated nominal density, 2.67 × 10³ kg/m³, supports weight-efficient sheet and formed-component design. The distinct 5154A composition includes a 0.10–0.50% combined manganese-plus-chromium requirement, so it should be controlled as its own registered designation rather than substituted casually.	It cannot be strengthened by a conventional solution-and-age heat treatment; strength is primarily controlled by cold work and temper. Mechanical properties vary materially with temper, product form and thickness, so a bare alloy designation is insufficient for structural procurement. As with other magnesium-bearing 5xxx alloys, prolonged elevated-temperature service and sensitization considerations should be assessed for critical welded or corrosive-service applications. The specified 5154A chemistry is not identical to 5154, 5154B, 5154C, 5454 or 5754; substitution can change composition compliance and product-standard requirements.

Advantages

Limitations

Moderate magnesium content gives higher inherent strength than lower-magnesium decorative and general-purpose 5xxx sheet alloys while retaining good formability.
Non-heat-treatable Al–Mg metallurgy provides dependable resistance to many atmospheric, fresh-water and marine service environments when the alloy and fabrication details are properly selected.
Good fusion-welding suitability makes the alloy practical for fabricated sheet assemblies and welded structures.
Low calculated nominal density, 2.67 × 10³ kg/m³, supports weight-efficient sheet and formed-component design.
The distinct 5154A composition includes a 0.10–0.50% combined manganese-plus-chromium requirement, so it should be controlled as its own registered designation rather than substituted casually.

It cannot be strengthened by a conventional solution-and-age heat treatment; strength is primarily controlled by cold work and temper.
Mechanical properties vary materially with temper, product form and thickness, so a bare alloy designation is insufficient for structural procurement.
As with other magnesium-bearing 5xxx alloys, prolonged elevated-temperature service and sensitization considerations should be assessed for critical welded or corrosive-service applications.
The specified 5154A chemistry is not identical to 5154, 5154B, 5154C, 5454 or 5754; substitution can change composition compliance and product-standard requirements.

Processing & Fabrication

Process	Description
Cold forming	Use the O temper for demanding bends, draws and formed profiles. Strain-hardened tempers offer greater strength but lower forming margin, particularly in tight-radius or severe draws.
Welding	The Al–Mg alloy family is generally well suited to conventional fusion-welding fabrication. Use a qualified welding procedure and filler-metal selection appropriate to the joint, service environment and required corrosion performance.
Cutting and machining	Sheet and strip can be sheared, punched or formed using normal aluminum practices. Provide clearance and tooling appropriate to the selected temper to control edge quality and distortion.
Heat treatment	Do not specify solution heat treatment and artificial aging as a means of raising strength. If stress relief or thermal processing is contemplated, verify the resulting temper and properties against the governing product specification.
Surface preparation	Remove lubricants, oxides and shop contamination before welding, coating or bonding. Surface-treatment selection should reflect the intended coating system and exposure environment.

Applications

5154A is most relevant to wrought sheet, strip and formed fabricated parts where a medium-magnesium 5xxx alloy is desired for corrosion resistance, weldability and useful strain-hardened strength. Suitability should be confirmed against the governing product standard and the selected temper.

Corrosion-resistant sheet fabrications: The aluminum-magnesium composition supports lightweight formed assemblies intended for atmospheric or moisture-prone service.
Welded panels and enclosures: Non-heat-treatable 5xxx alloys are valued where formed sheet must be joined by fusion welding without relying on post-weld precipitation aging.
Transportation and equipment sheet components: Low density, cold-forming capability and available strain-hardened conditions support weight-conscious panels, guards and fabricated components.
Marine-adjacent fabricated items: The Al–Mg alloy family offers useful resistance in many marine and salt-laden exposures; design, weld procedure and service temperature must still be evaluated for the actual duty.

Standards & Designations

Designation	Value	Description
Aluminum Association International Alloy Designation System	5154A	Active registered wrought aluminum-alloy designation; the registered composition is listed in the Aluminum Association Teal Sheets.
Former ISO 209-1 cross-reference	AlMg3.5(A)	The supplied Teal Sheets cross-reference lists 5154A as AlMg3.5(A) and notes that ISO 209-1 has been withdrawn and replaced by ISO 209.
AA designation	AA 5154A	The A suffix is integral to the designation and identifies a composition distinct from unsuffixed 5154.

Frequently Asked Questions

Is 5154A the same alloy as 5154?

No. 5154A is a separately registered wrought designation. Although both are Al–Mg 5xxx alloys, their registered composition limits differ; 5154A, for example, permits up to 0.50% silicon and iron and has a 0.10–0.50% combined Mn + Cr restriction. Specify the exact suffix.

Can 5154A be strengthened by heat treatment?

No. 5154A is a non-heat-treatable aluminum-magnesium alloy. Its practical strength level is established mainly by cold work and the supplied temper, such as annealed O or a strain-hardened H temper.

What information should be included when ordering 5154A sheet or strip?

State 5154A, the required product form and dimensions, complete temper, applicable product specification, and any mechanical-property, corrosion, surface-finish or inspection requirements. The alloy name alone does not establish temper-specific mechanical properties.

References & Data Notes

(n.d.). The Aluminum Association, International Alloy Designations and Chemical Composition Limits for Wrought Aluminum and Wrought Aluminum Alloys (Teal Sheets), revised December 2025. https://www.aluminum.org/sites/default/files/2026-01/Teal%20Sheets%20December%202025.pdf

Composition limits and calculated nominal density are taken from the supplied Aluminum Association Teal Sheets source for the exact active wrought 5154A designation. No temper-specific mechanical, thermal or electrical numerical data were supplied; those values must be obtained from an applicable 5154A product standard or producer datasheet for the required form and temper.