5083 Aluminum Flat Bar

5083 aluminum flat bar from Haomei Aluminum is a high-strength, magnesium-alloyed metal product known for exceptional marine corrosion resistance, excellent weldability, and a non-heat-treatable structure. It is a dependable choice for welded structures, saltwater exposure, transportation equipment, tanks, and industrial fabrication.

Alloy: 5083
Common Temper: H111
Form: Extruded Flat Bar
Alloy Series: 5xxx Aluminum-Magnesium
Weldability: Excellent
Marine Corrosion Resistance: Excellent

Unlike heat-treatable aluminum alloys, 5083 gains its mechanical properties through strain hardening and temper control. This makes it especially suitable for applications where corrosion resistance, welded-joint reliability, and long-term structural performance are more important than a decorative surface finish.

Whether your project requires standard stock dimensions or custom-cut material, Haomei Aluminum can support your order with size confirmation, technical consultation, export packaging, and global delivery arrangements.

Why Choose 5083 Aluminum Flat Bar?

5083 is one of the strongest non-heat-treatable aluminum alloys. Its magnesium content gives it excellent corrosion resistance, particularly in seawater and marine atmospheres. Compared with general-purpose aluminum grades, 5083 is often specified where welding, salt spray, moisture, and demanding service conditions are part of the design requirement.

Excellent marine corrosion resistance for saltwater and coastal environments.
High strength among non-heat-treatable 5xxx aluminum alloys.
Outstanding weldability for MIG and TIG welded fabrication.
Good chemical resistance for industrial tanks and equipment.
Non-heat-treatable structure with properties based on temper control.
Reliable low-temperature performance for cryogenic service conditions.

For plate-based shipbuilding and heavy marine fabrication, please see our 5083 aluminum plate product page.

5083 Aluminum Flat Bar Specifications

Item	Specification
Alloy	5083 Aluminum
Aluminum Grade	AA 5083 / EN AW-5083 / AlMg4.5Mn
Product Form	Aluminum Flat Bar / Flat Extruded Bar
Temper	H111, H112, H116, H321 (available upon request)
Manufacturing Process	Extruded, Cut-to-Length
Thickness	3 mm – 100 mm (custom sizes available)
Width	10 mm – 300 mm (custom sizes available)
Length	1000 mm – 6000 mm (custom lengths available)
Surface Finish	Mill Finish, Anodized Finish (optional)
Standard	ASTM B221, ASTM B211, EN 573, EN 755
Quality Documents	MTC, Chemical Composition Report, Mechanical Test Report, Third-Party Inspection (upon request)
Packaging	Export-standard seaworthy wooden cases, wooden pallets, protective film, moisture-proof wrapping, and secure strapping to prevent damage during transportation
Delivery Time	Normally 15–30 working days after order confirmation; customized sizes or large-volume orders may require additional production time
MOQ (Minimum Order Quantity)	1000 kg (negotiable based on size, specification, and order requirements)

Chemical Composition of 5083 Aluminum Flat Bar

Chemical Element	% Present
Aluminium (Al)	Balance
Magnesium (Mg)	4.00 – 4.90%
Manganese (Mn)	0.40 – 1.00%
Silicon (Si)	0.00 – 0.40%
Chromium (Cr)	0.05 – 0.25%
Titanium (Ti)	0.05 – 0.25%
Zinc (Zn)	0.00 – 0.10%
Copper (Cu)	≤ 0.10%
Iron (Fe)	≤ 0.40%
Other Elements (Each)	0.00 – 0.05%
Others (Total)	0.00 – 0.15%
Standard	BS EN 573-3 / EN AW-5083

Mechanical Properties of 5083 Aluminum Flat Bar & Extrusion

Mechanical Property	Typical Value
Product Form	Extruded Flat Bar / Aluminum Extrusion
Temper	H111 (Typical)
Proof Stress	145 MPa
Tensile Strength	300 MPa
Elongation A50 mm	23%
Shear Strength	175 MPa
Vickers Hardness	75 HV

General Physical Properties of 5083 Aluminum Alloy

Physical Property	Value
Density	2.65 g/cm³
Melting Point	570 °C
Thermal Expansion	25 × 10⁻⁶ /K
Modulus of Elasticity	72 GPa
Thermal Conductivity	121 W/m·K
Electrical Resistivity	0.058 × 10⁻⁶ Ω·m

5083 Aluminum Flat Bar Properties

The following table provides a general overview of 5083 aluminum flat bar characteristics. Final specifications should be confirmed according to the requested temper, dimensions, production route, and applicable material standard.

Property	Typical Characteristic
Alloy Series	5xxx Aluminum-Magnesium Alloy
Main Alloying Element	Magnesium
Heat Treatment	Non-heat-treatable
Corrosion Resistance	Excellent, especially in marine environments
Weldability	Excellent
Machinability	Fair; proper tooling and lubrication are recommended
Formability	Good, depending on temper and section size
Strength Level	High for a non-heat-treatable aluminum alloy
Typical Temper	H111

About 5083-H111 Temper

The H111 temper indicates that the material has been strain-hardened slightly through processing and then stabilized. It is commonly used for structural, marine, and welded applications where moderate strength, workable formability, and stable performance are required.

Actual mechanical properties may vary according to thickness, width, manufacturing method, and applicable standard. If your project has minimum yield strength, tensile strength, dimensional tolerance, inspection, or certificate requirements, please confirm them with Haomei Aluminum before placing an order.

5083-H111 Aluminum Flat Bar Stock Sizes

Haomei Aluminum maintains a range of 5083-H111 aluminum flat bar sizes for marine, transportation, and industrial fabrication applications. The inventory below shows commonly requested extruded flat bar dimensions, listed as thickness × width.

If you require a specific size, cutting length, quantity, or inspection document, our team can check current availability and provide a suitable supply solution.

5083-H111 Aluminum Flat Bar Size	Product Form
0.250" × 0.500" 5083-H111 Extruded Flat Bar	Aluminum Flat Bar
0.250" × 1.750" 5083-H111 Extruded Flat Bar	Aluminum Flat Bar
0.250" × 2.000" 5083-H111 Extruded Flat Bar	Aluminum Flat Bar
0.250" × 8.000" 5083-H111 Extruded Flat Bar	Aluminum Flat Bar
0.500" × 1.000" 5083-H111 Extruded Flat Bar	Aluminum Flat Bar
0.750" × 2.500" 5083-H111 Extruded Flat Bar	Aluminum Flat Bar
1.000" × 2.000" 5083-H111 Extruded Flat Bar	Aluminum Flat Bar
1.000" × 3.000" 5083-H111 Extruded Flat Bar	Aluminum Flat Bar
1.000" × 3.500" 5083-H111 Extruded Flat Bar	Aluminum Flat Bar
1.500" × 2.500" 5083-H111 Extruded Flat Bar	Aluminum Flat Bar
1.500" × 5.500" 5083-H111 Extruded Flat Bar	Aluminum Flat Bar
2.500" × 3.000" 5083-H111 Extruded Flat Bar	Aluminum Flat Bar
3.000" × 6.000" 5083-H111 Extruded Flat Bar	Aluminum Flat Bar
5.000" × 7.000" 5083-H111 Extruded Flat Bar	Aluminum Flat Bar

Need a different size? Available inventory may vary depending on production schedules and current orders. Please provide the required alloy, temper, dimensions, quantity, cutting length, destination, and any certification requirements for a fast availability confirmation.

5083 Aluminum Flat Bar Applications

Haomei Aluminum supplies 5083 flat bar for projects requiring a strong, weldable, and corrosion-resistant structural material. Typical end uses include marine construction, welded industrial equipment, transportation structures, and specialized fabricated parts.

Marine and Offshore Equipment

5083 aluminum flat bar is widely used for fabrication exposed to seawater and salt-laden air.

Boat and vessel structural members
Hull reinforcement components
Deck supports and frames
Marine brackets and fittings
Dock hardware and coastal structures
Offshore platform accessories

Industrial Structures

The alloy’s weldability and corrosion resistance make it practical for demanding industrial fabrication.

Storage tanks
Pressure vessel components
Chemical processing equipment
Welded frames and supports
Heavy-duty brackets
Material handling structures

Transportation and Defense

5083 provides a favorable strength-to-weight ratio for structures where weight reduction and durability are important.

Railcar components
Truck and trailer body structures
Vehicle chassis parts
Vehicle body components
Armor-related applications
Heavy transportation frames

Marine 5083 Aluminum Flat Bar Applications

If your project prioritizes general machining performance and heat-treatable strength, you may also consider our 6061 aluminum bar.

Custom 5083 Flat Bar Supply from Haomei Aluminum

Not every project can use a standard stock section. Haomei Aluminum supports customers requiring made-to-order 5083 aluminum flat bar for specific marine, industrial, and structural fabrication requirements.

Custom thickness and width
Fixed lengths or cut-to-length service
Metric or imperial dimensions
H111 and other suitable temper requirements
Mill finish or project-specific surface requirements
Small trial orders and bulk-volume supply
Export seaworthy packaging
Material documentation based on agreed order requirements

Information Needed for a Fast Quotation

To help our sales team prepare an accurate quotation, please provide:

Required alloy and temper, such as 5083-H111
Thickness × width × length
Quantity, number of pieces, or total weight
Application and operating environment
Required standard, inspection requirement, or material certificate
Delivery destination and preferred shipping terms

For broader alloy information, please visit our 5083 aluminum alloy guide or contact the Haomei Aluminum technical sales team.

Request a Quote for 5083 Aluminum Flat Bar

Haomei Aluminum supplies 5083-H111 aluminum flat bar for marine, industrial, transportation, and custom fabrication projects worldwide. Send us your required size, temper, quantity, and delivery location for a practical quotation based on current material availability.

Fabrication Notes for 5083 Aluminum Flat Bar

Welding

5083 is well suited to MIG and TIG welding. It is frequently used in welded structures because it can retain good strength and corrosion performance after welding when the correct procedure and compatible filler wire are selected.

For critical marine, pressure vessel, or load-bearing projects, the welding procedure, filler metal, joint design, and inspection requirements should be determined by the fabricator or project engineer.

Machining

5083 can be machined, although it is generally less free-machining than alloys such as 6061 or 2011. Sharp cutting tools, suitable feeds and speeds, chip control, and adequate lubrication can help improve surface quality and reduce built-up edge.

Forming

Flat bar forming depends on the section size, bend radius, temper, and fabrication method. Larger sections may require additional force or carefully planned bend radii. Where an exact formed profile is needed, sample bending is recommended before full production.

Corrosion Protection

In many marine and industrial applications, 5083 performs well in mill finish. However, when aluminum will contact dissimilar metals, appropriate isolation methods should be considered to help reduce the risk of galvanic corrosion.

5083 vs. 6061 Aluminum Flat Bar

Both 5083 and 6061 are widely used structural aluminum alloys, but each alloy is suited to different fabrication priorities and operating environments.

Feature	5083 Aluminum Flat Bar	6061 Aluminum Flat Bar
Marine Corrosion Resistance	Excellent	Good
Weldability	Excellent	Good
Heat Treatability	No	Yes
Typical Use	Marine, tanks, welded structures	General structures, machinery, precision parts
Strength After Welding	Often preferred for welded marine structures	Heat-affected zone may lose strength

Choose 5083 aluminum flat bar when seawater resistance, welded construction, and non-heat-treatable alloy performance are the main priorities. Choose 6061 aluminum flat bar where machining, heat treatment, and versatile general engineering performance are more important.

Recommended for you

5083 5383 O H112 Marine Grade Aluminum Bars

5083 5383 O H112 Marine Grade Aluminum Bars are certified by CCS, DNV, NK, CCS, ABS, BV, LR, KR and other classification societies, and their quality fully complies with world marine grade standards.
5083 Aluminum Bar

Specialized in producing 5083 aluminum bars, offering multiple tempers such as H112 and O, supporting custom machining with outer diameters ranging from Φ15mm to 450mm. Ample stock and fast delivery.
5083 Aluminum Round Bar

Haomei Aluminum supplies 5083 aluminum round bar and 5083-H111 round rod for marine, available from 3/8 inch to 8 inch diameter with custom cutting and mill test certification.
5083 5383 Marine Grade Aluminium Hex Bar

The 5083 and 5383 aluminum hex bars produced by Haomei comply with multiple international and industry standards to ensure product quality and performance meet global application requirements.
5083 5383 O H112 Marine Aluminum Square Bar

Haomei Aluminum is capable of producing marine-grade 5083 and 5383 aluminum square bars in O and H112 tempers, certified by major international classification societies including DNV, NK, CCS, ABS, BV, LR, and KR.

Other content readers are interested in

5083 marine grade aluminium checkered tread plate sheet

5083 pattern aluminum plate is widely used in decoration, shipbuilding and construction fields. Aluminum pattern plate has good forming, drilling and welding capabilities, is easy to manufacture, and its raised diamond lug pattern provides good slip resistance.
5083 Marine Grade Aluminum Pipe Tube

5083 Marine Grade Aluminum Pipe is commonly used in various marine applications such as shipbuilding, ship construction, offshore platforms and marine structures.
5083 Marine Grade Aluminum Plate Sheet

5083 marine grade aluminum is an aluminum alloy specifically designed for use in marine environments. It is known for its excellent corrosion resistance and high strength, making it ideal for applications such as shipbuilding, hulls, offshore structures and other marine components.
5083 H321 Aluminum Plate

As a trusted aluminum plate manufacturer, we specialize in producing high-quality 5083 H321 aluminum plates suitable for marine, transportation, and industrial applications.
5083 H116 Aluminum Plate

Our company offers 5083-H116 aluminum plates certified by classification societies (CCS/BV/DNV), featuring excellent corrosion resistance, weldability, and medium strength. They are widely used in ship decks, hull outer plates, LNG storage tanks, and other fields.
Aluminium 5083 H111

5083-H111 aluminum is a non-heat-treatable strain-hardened aluminum-magnesium alloy, known for its exceptional corrosion resistance in marine and industrial environments and its ability to maintain high strength even after welding.
Aluminum 5083 H112

With 20 years of experience in marine-grade aluminum production, our products are all certified by classification societies (such as CCS, DNV, etc.), and we offer customized solutions upon request.
5083 Aluminum Square Tubes

We specialize in the production of 5083 aluminum square tubes, supporting customization of outer diameter (10–2500mm), wall thickness (0.4–100mm), and length (5–2000mm). Certified by ISO, SGS, BV, and other international standards to ensure stable and reliable mechanical properties.
5083 H131 Aluminum Plate

Specializing in the production of 5083 H131 aluminum plates, we offer customized production with thicknesses from 0.2 to 350mm and widths from 30 to 2600mm. Global export supported, original factory warranty, and 30-day delivery.
5083 H32 Aluminum Plate

5083-H32 aluminum plate plays a key role in shipbuilding due to its excellent performance. Whether used for structural components in large vessels or critical parts of high-performance speedboats, it delivers reliable performance and long-term durability.
5083 O Aluminum

5083 O aluminum is a special state aluminum material based on 5083 aluminum alloy, formed through an annealing process.
5083 H22

5083-H22 is an aluminum-magnesium alloy plate, belonging to the 5xxx series of non-heat-treatable aluminum alloys.
5083 H34

5083 H34 is a strain-hardened and stabilized aluminum alloy in the 5000 series, known for its high strength, excellent corrosion resistance, and good weldability.