5182 aluminum alloy is a high-performance aluminum material that is widely used in the automotive industry, particularly in the lightweight design of vehicle bodies, chassis, and other structural components. With its high strength, excellent workability, corrosion resistance, and lightweight properties, it has become an ideal choice for automotive lightweighting and energy-saving environmental protection.
5182 aluminum alloy is mainly composed of magnesium and manganese elements, with a relatively low content of silicon (Si). Its main characteristics include:
- Tensile Strength and Yield Strength: The tensile strength and yield strength of 5182 aluminum alloy are slightly superior to those of 5052 and 5083 aluminum alloys. This gives it better load-bearing capacity in components like vehicle bodies that need to withstand certain tensile forces and pressures.
- Strength and Toughness: While maintaining relatively high strength, 5182 aluminum alloy also possesses excellent toughness. Its tensile, compression, and bending properties are outstanding, effectively enhancing the stability and crash resistance of vehicle bodies.
5182 aluminum alloy (Al-Mg series) is a high-plasticity, corrosion-resistant aluminum material with moderate strength. Its excellent deep drawing performance and uniform physical and mechanical properties make it the preferred material for non-load-bearing automotive body panels. 5182 aluminum alloy is widely used in hood inner panels, door inner panels, trunk lid inner panels, and wheel housings, contributing to vehicle lightweighting and environmentally friendly manufacturing.
5182 Automotive Aluminum Sizes
| Alloy | Temper | Thickness(mm) | Width(mm) |
| 5182 | O/H111 | 0.5-3.5 | 1200-2650 |
Haomei Aluminum offers automotive inner plates, outer plates, automotive structural materials, covering all key components for automotive lightweighting.
5182 Aluminum Automotive Sheet / Plate Material Advantages
| Feature | Description |
| Formability | Excellent deep drawing and stamping performance, suitable for complex rib structures |
| Corrosion Resistance | High Mg content, providing excellent resistance to atmospheric corrosion |
| Uniformity | Good isotropy in tensile properties and elongation, facilitating stamping and forming |
| Weldability | Suitable for spot welding, arc welding, and riveting, compatible with conventional automotive body manufacturing processes |
| Lightweight | Approximately 40% lighter than steel, aiding vehicle lightweight design |
5182 Automotive Aluminum Plate Processing Performance
- Workability: 5182 aluminum alloy has excellent workability in the O state (annealed state), making it suitable for processes like punching, stretching, and other forming techniques. It is particularly suitable for producing complex-shaped automotive body components such as doors, roofs, side panels, etc. Through these forming processes, manufacturers can easily produce parts that meet precise requirements.
- Difficult to heat treat: This alloy cannot be strengthened through heat treatment, but its cold-working performance is excellent, allowing it to be processed into various shapes via cold rolling and cold extrusion.
- Welding performance: With a low silicon content, 5182 aluminum alloy has excellent welding properties, with a low tendency for cracking during welding, making it suitable for welding complex components.
5182 Automotive Aluminum Plate Corrosion Resistance
Corrosion resistance: 5182 aluminum alloy has excellent corrosion resistance, able to withstand oxidation, acid and alkali, salt spray, and other harsh environmental conditions. This makes it particularly suitable for automotive parts that are exposed to outdoor environments for extended periods, such as body panels, decks, and chassis. By extending the lifespan of automobiles, 5182 aluminum alloy helps reduce maintenance costs and replacement frequency.
Compared to traditional steel materials, 5182 aluminum alloy has a much lower density. Using this material can significantly reduce the vehicle's weight, thereby decreasing fuel consumption and carbon dioxide emissions, aligning with the industry's current trends in environmental protection and energy conservation.
The energy absorption capacity of 5182 aluminum alloy is twice that of steel plates, which provides better energy absorption during vehicle collisions, helping to improve the vehicle's safety, particularly for pedestrian and driver head protection.
Haomei Aluminum's 5182 Aluminum Alloy Products
Haomei Aluminum offers customized 5182 aluminum plates to meet the specific needs of customers. Their products have the following advantages:
- Thickness range: The thickness of 5182 aluminum plates ranges from 0.15mm to 600mm, meeting the needs of various applications.
- Width and length: The product width can reach up to 2600mm, and the length ranges from 500mm to 1600mm, ensuring sufficient material support for large-scale production.
- Surface quality: The 5182 aluminum plates produced by Haomei Aluminum have a defect-free, flat surface, ensuring that the final product meets high-quality standards.
With its excellent strength, toughness, workability, corrosion resistance, and lightweight properties, 5182 aluminum alloy plays a crucial role in automotive lightweighting and safety. It not only reduces energy consumption and extends the vehicle's service life but also enhances overall safety, meeting the modern automotive industry's demand for environmentally friendly, energy-efficient, and high-performance materials. Therefore, 5182 aluminum alloy is an indispensable material in automotive manufacturing.
5182 Automotive Aluminum Chemical Composition
| Alloy | Si | Fe | Cu | Mn | Mg | Cr | Zn | Ti | Standard |
| 5182 | 0.20 | 0.36 | 0.15 | 0.20-0.50 | 4.0-5.0 | 0.10 | 0.25 | 0.10 | EN/ASTM |
5182 Automotive Aluminum Mechanical Properties
| Alloy | Temper |
Tensile Strength Rm(Mpa) |
Yield Strength Rp0.2(Mpa) |
Elongation at Break A80% |
Uniform Elongation Ag(%) |
Plastic Strain Ratio |
Strain Hardening Exponent |
Yield Tensile ratio Rp/Rm |
| 5182 | O/H111 | ≥270 | 120-160 | ≥23 | ≥20 | ≥0.6 | ≥0.26 | ≦0.6 |
Specific Applications of 5182 Aluminum Sheet in Automotive Body Panels
5182 aluminum plate has wide applications in automotive manufacturing, especially in vehicle body lightweighting and safety enhancement. Particularly, 5182 O-tempered body aluminum plates, with their excellent strength and forming performance, are commonly used to produce various automotive components. These parts not only effectively reduce the vehicle's body weight but also improve the vehicle's stability and safety, providing superior energy absorption in collisions.
5182 aluminum alloy is commonly used in the production of automotive body panels, especially those components that require high strength and lightweight properties. By using 5182 aluminum alloy body panels, not only can the overall weight of the vehicle be reduced, but the vehicle’s impact resistance can also be improved, thereby enhancing overall safety and reducing harm to pedestrians and passengers in the event of a collision.
5182 aluminum alloy is mainly used for automotive door inner panels, hood inner panels, trunk lid inner panels, and other "non-load-bearing but complex-shaped" exterior body structures, and is not used for primary safety load-bearing structures.
The typical applications of 5182 aluminum alloy (AA5182 / EN AW-5182) in automobiles are exterior body panels and non-load-bearing structural components, not primary load-bearing safety structures.
The applications of 5182 aluminum in automotive bodies include doors, roofs, side panels, hoods, and trunk lids.
Typical application areas
| Automotive Part | Description |
| Hood Inner Panel | Supports the hood outer panel, absorbs energy, and reduces weight |
| Door Inner Panel | Limited load-bearing function, excellent deep drawing performance |
| Trunk Lid Inner Panel | Complex rib designs, easy to stamp and form |
| Wheel Housing | Mud and dust protection, with corrosion resistance |
| Dash Panel Local Parts | Heat insulation, sound insulation, local reinforcement |
Note: 5182 is not suitable for primary safety load-bearing structures (such as crash beams, B-pillars, suspension parts, or main battery pack beams), which require high-strength 6xxx or 7xxx series aluminum alloys.
5182 Aluminum for Hood Inner Panel
Most typical application
Function: Supports the hood outer panel, absorbs energy, reduces weight
Why use 5182
- Excellent formability (deep drawing)
- Moderate strength, good isotropy
- Better dent resistance than 3003
Common tempers:
- 5182-O
- 5182-H111
- Outer panels usually use 6016 / 6111, inner panels commonly use 5182
5182 Aluminum for Trunk Lid Inner Panel
Application form: Stamped part
Advantages:
- Complex rib structures, reinforcement design easy to form
- Good compatibility with welding and riveting
Tempers: 5182-O / H111
5182 Aluminum for Door Inner Panel
Large-scale usage scenario
Note distinction:
- Outer panel: 6016 / 6111
- Inner panel: 5182
Reasons:
- Deep drawing performance superior to 6xxx series
- Does not rely on paint baking for strengthening
- Common thickness: 0.9–1.2 mm
| Application Component | Description |
| Car Door | The car door is a critical component of the vehicle, providing entry and exit while protecting passengers from side collisions. 5182 aluminum alloy, known for its excellent workability and high strength, is often used as the inner panel material for car doors. The lightweight properties of aluminum help reduce the door's weight while improving its strength and impact resistance. |
| Mudguard | Mudguards help reduce the vehicle’s drag coefficient, improve driving stability, and prevent mud and water from splashing, protecting the body. 5182 aluminum alloy has excellent weather resistance and formability, perfectly meeting the requirements for mudguard production. Its high strength and lightweight properties improve the vehicle's stability and better withstand harsh weather conditions. |
| Hood Outer Panel | Traditionally, the hood outer panel was made of steel, but to meet the lightweighting demands, more and more vehicles are now using 5182 aluminum alloy. It not only reduces the vehicle’s weight but also provides sufficient strength and toughness, enhancing overall vehicle safety. |
| Truck Tailgate | 5182 aluminum alloy is suitable for large components such as truck tailgates. Whether it’s a cargo truck tailgate or a truck cover, 5182 aluminum alloy provides the required strength while reducing vehicle weight, meeting modern logistics transportation demands for lightweighting and high strength. |
In automotive manufacturing, especially in the application of body panels, 5182 aluminum alloy demonstrates excellent lightweight performance and safety. Whether it's car doors, mudguards, hoods, or truck tailgates, 5182 aluminum alloy helps achieve vehicle lightweighting and energy-saving goals by reducing weight and enhancing strength. Moreover, its excellent corrosion resistance and welding performance make it an indispensable material in the modern automotive industry.
Automotive Areas Where 5182 Aluminum is Not Suitable
| Part | Reason |
| Crash Beam | Insufficient strength |
| B-Pillar / Main Side Structure | Cannot meet crash regulations |
| Subframe | Cannot be heat treated, insufficient strength |
| Suspension Parts | Insufficient fatigue strength |
| Main Battery Pack Beam | Insufficient compressive and impact resistance |
These parts typically use 6082 / 6061 / 7003 / cast aluminum
5182 vs Common Automotive Aluminum Alloys
| Alloy | Application | Typical Part |
| 5182 | Formable structural components | Inner panels, cover panels |
| 6016 | Exterior appearance panels | Outer panels |
| 6111 | High-end exterior panels | Door outer panels |
| 6061 | Medium-strength structural components | Beams, brackets |
| 6082 | High-strength structural components | Crash beams |
Automotive Structural Aluminum Applications and Common Alloy Grades
| Aluminum Alloy Series | Typical Grades | Application Areas |
| 5xxx | 5083 / 5182 | Limited structural panels |
| 6xxx | 6016 / 6111 / 6061 / 6082 | Cover panels, structural components |
| 7xxx | 7003 | Crash beams |
| Cast Aluminum | AlSi10Mg / A356 | Subframes, suspension |
| Extrusions | 6063 / 6005A | Roof racks, battery packs |
5182 Aluminum for Car Body Structural Components
Door (Inner panel / Outer panel / Crash Beam)
Application Areas
- Door outer cover panel
- Door inner panel
- Door crash beam (some models)
Common Aluminum Alloys
- AA6016 / AA6111 (6xxx series) → Outer panel
- AA6022 / AA6061 → Inner panel
- AA6082 / AA7003 → Crash beam (extruded parts)
Door Frame / Side Structure
Application Form
- Aluminum profile welding assembly
- Aluminum sheet stamping
Common Aluminum Alloys
- AA6082-T6
- AA6063-T6
- AA7003-T5 (some high-end / new energy vehicles)
Hood / Trunk Lid
Application Areas
- Outer panel
- Inner reinforcement panel
Common Aluminum Alloys
- AA6016-T4
- AA6111-T4
- AA6022-T4
Roof Panel & Roof Rail
Application Areas
- Roof outer panel
- Roof reinforcement beams (cross beams, longitudinal beams)
Common Aluminum Alloys
- AA6016 / 6022 (sheet)
- AA6082 / 6063 (profile)
Chassis & Load-bearing Components
Front and Rear Crash Beams
Forms
- Extruded profiles
- Multi-chamber structures
Common Aluminum Alloys
- AA6082-T6 (most mainstream)
- AA6061-T6
- AA7003-T5 (high energy absorption)
Subframe / Cross Member
Application Methods
- Aluminum castings
- Aluminum welded structures
Common Aluminum Alloys
- AlSi10Mg (casting)
- A356-T6 (cast aluminum)
- AA6082 (welded profiles)
Control Arm / Suspension Arm
Common Forms
- Forged aluminum
- Cast aluminum
Common Aluminum Alloys
- AA6082 / 6061 (forged)
- A356 / AlSi7Mg (cast)
Battery Tray / EV Battery Pack Housing
Forms
- Aluminum profiles + aluminum sheet welding
- Aluminum die castings
Common Aluminum Alloys
- AA6063 / AA6005A (profiles)
- AA6082 (structural beams)
- AlSi10Mg (die casting)
Exterior & Functional Structural Components
Roof racks / Side steps
Common Aluminum Alloys: AA6063-T5 / T6, AA6005A