3004 Aluminum

Representative aluminum raw/semi-finished material photo; exact grade not verified

3004 Aluminum (AA 3004) is a wrought Al–Mn–Mg alloy developed for moderate strength, good corrosion resistance, and reliable sheet forming. Compared with 3003, its magnesium addition provides higher strength while retaining the work-hardening response and fabrication practicality associated with the 3xxx series. It is widely supplied as rolled sheet or coil, including mill-finish, painted, and stucco-embossed products. Because it is non-heat-treatable, strength is primarily selected through cold-work and stabilization temper rather than precipitation heat treatment.

Chemical Composition (wt.%)
Chemical Composition wt.%
Element	Min	Max
Silicon	—	0.30
Iron	—	0.70
Copper	—	0.25
Manganese	1.0	1.5
Magnesium	0.8	1.3
Zinc	—	0.25
Other elements, each	—	0.05
Other elements, total	—	0.15
Aluminum	Remainder

Composition notes

Silicon: Registered maximum.
Iron: Registered maximum.
Copper: Registered maximum.
Manganese: Registered range.
Magnesium: Registered range.
Zinc: Registered maximum.
Other elements, each: Maximum for each unspecified element.
Other elements, total: Maximum total of unspecified elements.
Aluminum: Registered balance.

Registered wrought composition limits are in weight percent. Aluminum is the remainder. “Others” applies to elements not individually specified: 0.05% maximum each and 0.15% maximum total.

Physical and mechanical values below are reported for 3004 rolled products by the cited datasheet. Mechanical values are temper-specific and should not be treated as universal minimum requirements for every product size or specification.

Use the button to switch between Metric and US Customary units.

Table of 3004 Aluminum Properties

Table of 3004 Aluminum Properties
Physical Properties	Metric
Density	2.72 g/cm³2.72 g/cm³
Mechanical Properties	Metric
Modulus of Elasticity	69 GPa
Modulus of Rigidity	24.5–26.5 GPa
Proof Strength (H14)	180 MPa
Tensile Strength (H14)	220–265 MPa
Proof Strength (H32)	145 MPa
Tensile Strength (H32)	190–240 MPa
Proof Strength (H34)	170 MPa
Tensile Strength (H34)	220–265 MPa
Proof Strength (H42)	130 MPa
Tensile Strength (H42)	185–240 MPa
Proof Strength (H44)	180 MPa
Tensile Strength (H44)	210–265 MPa
Proof Strength (H46)	200 MPa
Tensile Strength (H46)	230–285 MPa
Thermal Properties	Metric
Melting Range	630–655 °C
Thermal Capacity	840 J/(kg·°C)
Thermal Conductivity	163 W/(m·°C)
Coefficient of Thermal Expansion	23.9 × 10⁻⁶ /°C
Electrical Properties	Metric
Electrical Resistivity	42 nΩ·m

Test conditions & data notes

Density: At 20°C.
Melting Range: Reported physical-property range.
Thermal Capacity: Reported physical property.
Thermal Conductivity: Reported physical property.
Coefficient of Thermal Expansion: Reported physical property.
Electrical Resistivity: At 20°C.
Modulus of Elasticity: Reported physical property.
Modulus of Rigidity: Reported physical-property range.
Proof Strength (H14): 3004 H14 rolled product.
Tensile Strength (H14): 3004 H14 rolled product.
Proof Strength (H32): 3004 H32 rolled product.
Tensile Strength (H32): 3004 H32 rolled product.
Proof Strength (H34): 3004 H34 rolled product.
Tensile Strength (H34): 3004 H34 rolled product.
Proof Strength (H42): 3004 H42 rolled product.
Tensile Strength (H42): 3004 H42 rolled product.
Proof Strength (H44): 3004 H44 rolled product.
Tensile Strength (H44): 3004 H44 rolled product.
Proof Strength (H46): 3004 H46 rolled product.
Tensile Strength (H46): 3004 H46 rolled product.

Material Conditions & Tempers

3004 is a non-heat-treatable alloy. H tempers obtain strength principally through strain hardening; H3 tempers are stabilized after cold work, while H4 tempers are lacquered or painted variants. Exact availability, gauge range, and guaranteed properties depend on the relevant product standard and mill agreement.

Condition	Tensile Strength	Yield / Proof Strength	Notes
H14	220–265 MPa	180 MPa proof strength	Strain-hardened rolled-product temper with moderate strength. Minimum elongation reported as 3%; minimum 90° bend radius 1T.
H32	190–240 MPa	145 MPa proof strength	Strain-hardened and stabilized temper offering a lower-strength, more formable condition than H34. Minimum elongation reported as 3%; minimum 90° bend radius ½T.
H34	220–265 MPa	170 MPa proof strength	Strain-hardened and stabilized temper for higher strength in rolled products. Minimum elongation reported as 4%; minimum 90° bend radius 1T.
H42	185–240 MPa	130 MPa proof strength	Lacquered or painted temper designation based on H2-type strain hardening. Minimum elongation reported as 5%; minimum 90° bend radius 0T.
H44	210–265 MPa	180 MPa proof strength	Lacquered or painted temper designation based on H4-type strain hardening. Minimum elongation reported as 4%; minimum 90° bend radius 1T.
H46	230–285 MPa	200 MPa proof strength	Higher-strength lacquered or painted rolled-product temper. Minimum elongation reported as 4%; minimum 90° bend radius 1T.

Advantages & Limitations

Advantages	Limitations
Higher work-hardened strength than 3003 due to its 0.8–1.3% magnesium addition. Good formability for roll forming and general sheet-metal fabrication, particularly in moderate H tempers. Moderate-to-good corrosion resistance for building, painted-sheet, and general engineering service. Good compatibility with coil coating, powder coating, and spray coating. Suitable for MIG, TIG, laser, and high-frequency welding according to the cited rolled-product datasheet. Low density, with a reported nominal density of 2.72 g/cm³ at 20°C.	3004 cannot be strengthened by precipitation heat treatment; mechanical strength is controlled mainly by cold work and temper. Its corrosion resistance is useful for many atmospheric applications but should be evaluated for aggressive chemical, marine, or galvanically coupled environments. Highly work-hardened tempers offer less forming latitude than softer tempers; bend radius and forming trials should reflect the selected temper and sheet thickness. It is not normally selected where the high strength of 5xxx or heat-treatable 6xxx/7xxx alloys is required. Welded-joint properties and coating performance depend on filler selection, joint design, thermal input, and the particular product condition.

Advantages

Limitations

Higher work-hardened strength than 3003 due to its 0.8–1.3% magnesium addition.
Good formability for roll forming and general sheet-metal fabrication, particularly in moderate H tempers.
Moderate-to-good corrosion resistance for building, painted-sheet, and general engineering service.
Good compatibility with coil coating, powder coating, and spray coating.
Suitable for MIG, TIG, laser, and high-frequency welding according to the cited rolled-product datasheet.
Low density, with a reported nominal density of 2.72 g/cm³ at 20°C.

3004 cannot be strengthened by precipitation heat treatment; mechanical strength is controlled mainly by cold work and temper.
Its corrosion resistance is useful for many atmospheric applications but should be evaluated for aggressive chemical, marine, or galvanically coupled environments.
Highly work-hardened tempers offer less forming latitude than softer tempers; bend radius and forming trials should reflect the selected temper and sheet thickness.
It is not normally selected where the high strength of 5xxx or heat-treatable 6xxx/7xxx alloys is required.
Welded-joint properties and coating performance depend on filler selection, joint design, thermal input, and the particular product condition.

Processing & Fabrication

Process	Description
Forming and roll forming	3004 has good formability and is suitable for roll forming and general fabrication. Select temper to balance required strength against bendability; the cited H32 sheet condition has a reported minimum 90° bend radius of ½T, while H14 and H34 are reported at 1T.
Welding	The cited product datasheet identifies MIG, TIG, laser, and high-frequency welding as suitable methods. Clean surfaces and a qualified procedure are important, especially for coated stock and appearance-critical products.
Coating and finishing	3004 is suitable for coil coating, powder coating, and spray coating. Mill-finish, painted, and stucco-embossed forms are reported as available product finishes.
Strength selection	Use strain-hardened or stabilized H tempers rather than a solution-treatment-and-aging cycle. 3004 is a non-heat-treatable wrought alloy, so thermal aging is not the route used to develop its specified strength.

Applications

3004 is selected where rolled aluminum needs more strength than a basic Al–Mn sheet alloy while maintaining practical forming and coating behavior. Its combination of moderate strength, corrosion resistance, and availability in finished sheet products makes it especially useful for formed building and general-engineering components.

Roofing and cladding: Painted, stucco-embossed, and mill-finish sheet options, together with corrosion resistance and roll-forming capability, suit exterior building products.
Building products: The alloy provides moderate strength at low density and can be formed into panels, trims, and profiles.
Signage: Coating compatibility and sheet formability support painted sign faces and fabricated sign components.
General engineering sheet products: Hardened tempers provide useful proof and tensile strength for fabricated parts that do not require a heat-treatable alloy.

Standards & Designations

Designation	Value	Description
Aluminum Association / International Alloy Designation System	3004	Active registered wrought aluminum-alloy designation; composition limits are listed in the Aluminum Association Teal Sheets.
Aluminum Association	AA 3004	Common designation for the 3004 wrought alloy.
Declaration of Accord / ISO cross-reference	AlMn1Mg1	The Aluminum Association cross-reference table identifies 3004 as AlMn1Mg1; the document notes that ISO 209 references the Teal Sheets as the normative source for international alloy designations.

Frequently Asked Questions

What is the principal difference between 3004 and 3003 aluminum?

Both are wrought 3xxx Al–Mn alloys, but 3004 also contains 0.8–1.3% magnesium. This addition gives 3004 greater work-hardened strength than 3003 while retaining good formability and corrosion resistance.

Can 3004 aluminum be heat treated to increase strength?

No. 3004 is non-heat-treatable; it develops strength principally through cold work. H tempers identify strain-hardened conditions, and H3 tempers include stabilization after strain hardening.

Is 3004 suitable for painted architectural sheet?

Yes. The cited 3004 rolled-product datasheet states that it is suitable for coil coating, powder coating, and spray coating, and identifies building products, roofing, cladding, and signage as applications. Coating-system selection should still match the exposure and substrate-preparation requirements.

References & Data Notes

(n.d.). International Alloy Designations and Chemical Composition Limits for Wrought Aluminum and Wrought Aluminum Alloys (Teal Sheets), December 2025. https://www.aluminum.org/sites/default/files/2026-01/Teal%20Sheets%20December%202025.pdf
(n.d.). 3004 Datasheet, Hulamin Rolled Products. https://www.hulamin.com/sites/default/files/downloads/3004%20Datasheet.pdf
(n.d.). 3004, Alclad 3004, and 3104: Al-Mn-Mg Alloy, ASM Handbook. https://dl.asminternational.org/handbooks/edited-volume/91/chapter/2088123/3004-Alclad-3004-and-3104Al-Mn-Mg-Alloy

Composition values are registered limits for wrought alloy 3004 from the Aluminum Association Teal Sheets. Physical and mechanical values are source-reported rolled-product data and are conditional on the stated temper; verify the controlling product specification, thickness range, and supplier certification before design or procurement.