3104-H18 Aluminum Sheet and Coil

3104 H18 aluminum alloy is based on the 3104 aluminum alloy in the H18 temper, which is one of the highest strength states obtained through work hardening.

Haomei Aluminum supplies 3104-H18 aluminum sheet and coil for applications that require high strength, good corrosion resistance and consistent dimensional performance. As a fully strain-hardened temper, H18 provides higher strength than softer 3104 tempers and is commonly selected for formed components, packaging-related products and general sheet-metal applications.

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3104-H18 aluminum sheet manufactured by Haomei Aluminum

3104-H18 aluminum sheet supplied by Haomei Aluminum

Alloy Aluminum-Magnesium-Manganese
Strengthening Cold Working / Strain Hardening
Product Forms Sheet, Coil, Strip
Processing Slitting, Cut-to-Length

What Is 3104-H18 Aluminum?

3104-H18 aluminum is a high-strength aluminum-magnesium-manganese alloy that achieves its maximum hardness and strength entirely through cold working, also known as strain hardening, rather than heat treatment.

3104 belongs to the 3xxx aluminum alloy series. Magnesium and manganese are the principal alloying elements, helping the material achieve a useful balance of strength, anti-rust performance, corrosion resistance and process stability.

In the H18 temper, 3104 aluminum is fully strain-hardened after substantial cold rolling. This condition provides a higher strength level than softer tempers such as H14 or H16. Typical tensile strength is generally 275 MPa or higher, subject to thickness, applicable standard and final delivery condition.

The main distinction of 3104-H18 is not a heat-treatment process. The H18 temper is achieved through controlled cold working, giving the alloy a harder and stronger condition than softer 3104 tempers.

3104-H18 Aluminum Specifications

Haomei supplies 3104-H18 aluminum in sheet, coil and slit-strip forms. Dimensions and processing details can be customized according to the application, equipment and downstream production requirements.

Item	Typical / Available Range
Alloy	3104
Temper	H18
Product Form	Sheet, Coil, Slit Strip
Thickness	Customized according to production requirements
Width	Customized according to production requirements
Surface	Mill Finish
Processing	Slitting, Cut-to-Length, Edge Trimming
Application	Packaging, Automotive, Lighting, General Fabrication

For more information on 3104 aluminum plate and sheet sizes, product forms and available dimensions, see our 3104 Aluminum Plate Sheet. For coil processing, custom widths and slit strip requirements, visit our 3104 Aluminum Coil & Strip page.

Why Choose 3104-H18 Aluminum?

High strength produced by strain hardening
Good resistance to atmospheric and industrial corrosion
Stable performance for sheet metal fabrication
Good weldability with suitable welding procedures
Smooth surface options for industrial finishing
Available in coil, slit coil and sheet formats
Non-heat-treatable alloy with consistent cold-worked properties
Suitable for applications requiring rigidity and deformation resistance

H18 is a fully hardened temper. Although 3104 alloy has good general forming characteristics, 3104-H18 has lower elongation and reduced formability compared with O, H14 or H16 material. It is not normally the first choice for severe deep drawing or demanding bending operations.

3104-H18 Aluminum Alloy Composition

3104 aluminum alloy belongs to the aluminum-manganese alloy series. The main components typically include aluminum, manganese, silicon (Si), iron (Fe), copper (Cu), magnesium (Mg), etc.

Aluminum (Al): Makes up the majority, approximately 97.5%-99%
Manganese (Mn): 0.8%-1.4% (Improves strength and corrosion resistance)
Other elements such as silicon (Si), iron (Fe), copper (Cu), and magnesium (Mg) are present in smaller amounts.

Elements	Si	Fe	Cu	Mn	Mg	Zn	Others	Al
Content	0.6	0.8	0.05～0.25	0.8～1.4	0.8～1.3	0.25	0.05	Remain

3104-H18 Aluminum Mechanical Properties

Yield strength: The yield strength of 3104-H18 aluminum is typically between 200-270 MPa, which gives it higher load-bearing capacity compared to other softer aluminum alloy states.
Tensile strength: The tensile strength is generally between 275-320 MPa, making it suitable for applications requiring higher strength.
Ductility: Despite the high strength, the ductility of 3104-H18 is relatively low due to the cold processing, meaning it does not easily deform like aluminum alloys in other states.

Applications of 3104-H18 Aluminum

Packaging and Can-Stock Related Components

3104 alloy is widely associated with beverage can applications. However, temper selection must match the production route. For can body stock and higher-strength can-stock requirements, 3104 H19 aluminum sheet coil may be more suitable depending on required strength and forming conditions.

Lighting Components

Used for lamp housings, holders, caps and related lighting components where corrosion resistance, surface quality and dimensional stability are important.

Automotive and Transportation Parts

Suitable for selected automotive sheet components, fuel-related parts, protective covers and fabricated assemblies where corrosion resistance is required.

Slit Coil Processing

For narrow-width materials, continuous feed production or strip processing lines, please see our 3104 Aluminum Coil Strip supply options.

Industrial Sheet Metal Components

Suitable for fabricated panels, housings, covers and structural sheet metal parts that require better rigidity and deformation resistance than softer aluminum tempers.

General Fabrication

The material can be processed into stamped parts, welded structures, equipment enclosures and other aluminum sheet products with moderate forming requirements.

3104-H18 Aluminum Workability

Weldability: Due to the work-hardened nature of the H18 temper, the weldability of 3104-H18 aluminum is poor. Cracks or deformations may occur during welding, so it is generally not recommended for welding applications.
Formability: In the H18 temper, 3104 aluminum alloy has poor formability. Unlike soft-temper aluminum alloys, it cannot undergo large-scale forming processes like stamping and bending. After cold processing, the material’s high hardness makes further forming difficult.
Machinability: Despite its higher hardness, 3104-H18 aluminum can still be machined, but more durable tools and slower processing speeds are required.

3104-H18 Aluminum Corrosion Resistance

3104 aluminum alloy has good corrosion resistance, especially in atmospheric and marine environments. The addition of manganese enhances the corrosion resistance of the alloy, preventing oxidation and pitting, making it suitable for applications that require excellent corrosion protection.

Quality Control at Haomei Aluminum

As an aluminum sheet and coil manufacturer, Haomei Aluminum focuses on stable quality from raw material selection to final packaging.

Chemical composition inspection
Thickness and width tolerance control
Surface inspection
Flatness and coil-shape evaluation
Mechanical-property testing
Coil weight and packaging verification
Mill Test Certificate support
Pre-shipment inspection according to customer requirements

3104-H18 aluminum sheet inspection and packaging at Haomei Aluminum

For export orders, 3104-H18 aluminum products can be packed with moisture-proof protection, edge protection and seaworthy wooden pallets. Customized packaging solutions are also available for sea, rail and road transportation.

Why Source 3104-H18 Aluminum from Haomei Aluminum?

Haomei Aluminum supplies aluminum sheet, plate, coil and strip for industrial customers, distributors, fabricators and project buyers. Purchasing aluminum is not only about the alloy designation. Thickness tolerance, flatness, coil handling, forming route, surface requirements and delivery reliability also affect the final production result.

Manufacturer-direct supply
Sheet, coil and slit coil options
Customized width, length and coil weight
Technical support for alloy and temper selection
Export packaging for sea, rail and road transportation
Material documentation available upon request
Support for trial orders and repeat production orders
Applicable standards including ASTM, EN, JIS and GB/T

Request a Quote for 3104-H18 Aluminum

Send Haomei Aluminum your required product form, thickness, width, temper, quantity and destination port. Our team will provide a quotation and technical confirmation based on your project requirements.

Contact Haomei Aluminum

3104-H18 Aluminum vs. Other Tempers

The 3104 alloy can be supplied in different temper conditions. The primary difference is the amount of strain hardening and the resulting balance between strength and formability.

Temper	Relative Strength	Formability	Typical Consideration
O	Lower	Excellent	Deep forming and applications requiring high ductility
H14 / H16	Moderate	Moderate	General fabrication and balanced strength/formability
H18	High	Lower	Higher strength, hardness and rigidity
H19	Very High	Lower	Can stock and selected high-strength applications

If your application requires a harder 3104 temper for can-stock or other high-strength applications, see our 3104 H19 Aluminum Sheet & Coil for a closer comparison.

FAQ – 3104 H18 Aluminum

What does H18 mean in 3104 aluminum?

H18 indicates that 3104 aluminum has been strain hardened to a high level through cold working, resulting in a relatively high-strength and hard condition.

What is 3104-H18 aluminum used for?

3104-H18 aluminum can be considered for packaging-related components, selected automotive parts, lighting products, holders and general sheet-metal applications where strength, corrosion resistance and dimensional stability are required.

Is 3104-H18 suitable for deep drawing?

The H18 temper has lower ductility than softer tempers. For extensive deep drawing, the forming depth, bend geometry and required final properties should be reviewed before selecting H18.

Can Haomei supply 3104-H18 aluminum coil and sheet to custom sizes?

Haomei Aluminum can supply 3104-H18 aluminum sheet, coil and slit strip according to specified alloy, temper, thickness, width, quantity, surface and processing requirements.

What is the difference between 3104-H18 and 3104-H19 aluminum?

Both are high-strength strain-hardened tempers. H19 is generally an extra-hard condition and may be specified for applications requiring a higher strength level. The final choice should be based on thickness, forming process and the applicable product standard.

Can Haomei Aluminum provide customized 3104-H18 coil widths?

Yes. Haomei Aluminum can provide customized width, thickness, coil weight, coil ID, slit coil and sheet cutting services according to production requirements.

What information is needed for a 3104-H18 aluminum quotation?

Please provide the product form, alloy and temper, thickness, width, sheet length or coil weight, surface requirement, quantity, required standard, destination port and intended application if temper confirmation is needed.

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