The global automotive and transportation industries are rapidly moving toward lightweight manufacturing. To reduce vehicle weight, save fuel, and meet strict emission standards, manufacturers are replacing heavy steel components with high-strength aluminum alloys.
For critical load-bearing structures like vehicle chassis, standard aluminum is not strong enough. This is where the 5083 medium and thick aluminum plate comes in. As a high-strength, non-heat-treatable alloy, 5083 offers an outstanding combination of high structural strength, excellent corrosion resistance, and superior welding performance. It is highly resistant to fatigue, meaning it can withstand the constant vibration, dynamic loads, and high pressure that a truck chassis or heavy machinery frame experiences every day.
Contact GNEE today to buy 5083 aluminum plate for your chassis production. We offer competitive pricing and factory-direct supply.
What is 5083 Aluminum Plate?
The 5083 aluminum alloy belongs to the Al-Mg (5xxx series) family. It is famous for its high Magnesium content, which gives the metal its impressive mechanical properties and extreme resistance to harsh environments.
This product specifically focuses on medium and thick plates, generally ranging from 6 mm to 200 mm in thickness. Because thick plates are used in safety-critical applications, they must possess high strength, absolute structural reliability, and no internal defects. The most common tempers for 5083 thick plates in chassis manufacturing are H111, H112, H116, and H321.
The chemical composition of 5083 aluminum for automotive body sheet panels
| Element | Composition (%) |
| Si | 0.40 |
| Fe | 0.40 |
| Cu | 0.10 |
| Mn | 0.40-1.0 |
| Mg | 4.0-4.9 |
| Cr | 0.05-0.25 |
| Ni | -- |
| Zn | 0.25 |
| Ti | 0.15 |
| Al | Remainder |
The mechanical property of 5083 automotive sheet metal body panels
| Alloy Temper | Thickness mm | Tension Strength Rm N/mm2 | Yield Strength R p0.2 N/mm2 | Elongation A 50 min % |
| 5083 O H111 | 6.30-12.50 | 270-345 | 115 | ≥16 |
| 5083 H32 | 0.70-1.50 | 305-380 | 215 | ≥6 |
Compared to another common automotive aluminum (like 5754), the 5083 alloy provides approximately 30% to 50% higher strength. This makes 5083 the mandatory choice for heavy-load structures where safety and durability cannot be compromised.
Temper Comparison
Choosing the right temper depends on how you plan to process the aluminum plate in your factory.
| Temper | Characteristics | Structural Role in Manufacturing |
| 5083 H111 | Moderate strength with good ductility. | Best for general structural parts that require some bending and forming before welding. |
| 5083 H112 | Hot-worked state, highly stable mechanical properties. | Ideal for thick plate CNC machining where internal stress must be stable to prevent warping. |
| 5083 H116 | High corrosion resistance, specially treated. | Used in chassis parts exposed to severe road salt, moisture, and harsh weather. |
| 5083 H321 | Stabilized state, excellent anti-corrosion properties. | Best for long-life, heavy-duty load-bearing structures. |
5083 Aluminum Plate and Sheet Specifications
| Category | Description |
| Alloy / Temper | 5083 Aluminum, 5083 H111, 5083 H116, 5083 H321, 5083 H32, 5083 H34, 5083 H22, 5083 O, AA5083, EN AW 5083, AL 5083 H112, AL 5083 O |
| Product Type | 5083 Aluminum Plate, 5083 Aluminum Sheet, 5083 Tooling Plate, 5083 Cast Aluminum Plate, 5083 Aluminum Tube, 5083 Aluminum Armor Plate |
| Applications | Welding components, Marine and Shipbuilding, Armor Plate, Tooling and Molds, Structural Components (tubes, frames, panels) |
| Standards / Certification | ASTM 5083, ASTM B928, EN 5083, EN AW 5083, QQ-A250/6 |
| Thickness (inches) | 0.01", 0.118", 0.236", 0.250", 0.5", 1" (customizable 1 mm – 200 mm) |
| Width (inches) | 36", 48", 60", 72" |
| Length (inches) | 48", 96", 118", 120", 144" |
| Finish | Mill Finish, Anodized, Color Coated, PVDF Coated, Mirror, Brushed, Embossed, Checkered, Stucco Embossed |
Read More:5083 Ultra-Wide Aluminum Plate For Tank Trucks
Surface Finish Options
For thick aluminum plates used in structural applications, surface integrity is directly tied to welding quality and safety. We offer the following surface treatments:
- Mill Finish: The standard raw finish directly from the rolling mill.
- Brushed Surface: Removes minor surface imperfections.
- Shot Blasting: Creates a uniform matte finish and relieves surface stress.
- Anti-Slip Surface: Optional CNC machining for walkable structural areas.
- Protective Film: Added upon request to prevent scratches during transport and handling.
Surface Quality Requirements:
Our quality control ensures that every plate has no cracks, no delamination (layer separation), no corrosion, and no oil stains. A perfectly clean and flat surface is guaranteed, ensuring your automated welding robots can work without interruption.
Do you need custom dimensions for your CNC machining or structural fabrication? As a professional 5083 aluminum plate supplier, GNEE can cut to your exact requirements
Common Applications of 5083 aluminum sheet for automotive body
The 5083 medium and thick aluminum plate is strictly engineered for environments with high pressure, high impact, and continuous vibration. Here are its most common real-world applications:
1. Automotive Industry
In modern passenger and commercial vehicles, 5083 is heavily used for truck chassis longitudinal beams and cross members. These parts are the "spine" of the vehicle and require massive tensile strength. Additionally, it is the primary material for new energy vehicle (NEV) battery tray structures, protecting the heavy battery pack from road impacts while saving significant weight.
2. Commercial Vehicles
Heavy-duty truck frames, flatbed trailer structural plates, and the heavy support brackets for liquid tankers are largely manufactured using 5083-H111 or H112 thick plates. The material easily handles the dynamic load of a fully loaded trailer moving at highway speeds.
3. Engineering Machinery
Look at a construction site. The heavy load-bearing plates on cranes, the rigid structural parts of an excavator's arm, and the reinforced chassis of mining dump trucks utilize 5083 plates ranging from 25mm to 80mm thick.
4. Fabrication Processing
For general metal fabrication, this alloy is widely used for CNC machining structural components and complex welding fabrication structures. Because 5083 retains excellent strength in the weld zone, engineers trust it for high-load fatigue-resistant parts.
Standard Sizes & Specifications
Different sections of a vehicle require different thicknesses. A battery tray needs medium thickness, while a heavy truck longitudinal beam requires much thicker material to carry heavy cargo.
| Thickness (mm) | Width (mm) | Length (mm) | Common Application |
| 6 – 12 | 1500 – 2500 | 3000 – 6000 | Light chassis parts, battery trays |
| 12 – 25 | 1500 – 3000 | 6000 – 12000 | Main structural beams, truck cross members |
| 25 – 80 | 2000 – 3500 | Custom | Heavy-duty commercial chassis, excavator parts |
| 80 – 200 | Custom | Custom | Extreme load structures, thick base plates |
Thickness Recommendations:
- Truck Chassis: 12 mm to 40 mm.
- Heavy Equipment/Machinery: 25 mm to 80 mm.
At GNEE, our production lines can handle extra-wide plates and fully customized thicknesses. We also support mixed batch orders so you can purchase all the required sizes for your project at once.
Upgrading your commercial trailer or heavy machinery designs? Reach out to our engineering sales team. We can recommend the perfect temper and thickness for your high-load structural parts.
Production and Quality Control
Manufacturing thick aluminum plates requires highly advanced technology. If a thick plate has internal defects, it will fail under heavy loads. GNEE takes quality control very seriously.
- Large-Scale Hot Rolling: We use advanced hot rolling mills that can press thick ingots into dense, high-strength plates.
- Ultrasonic Testing (UT): This is mandatory for thick plates. We use sound waves to scan the inside of the aluminum plate. If there are any hidden air pockets or internal cracks, the UT scan will catch them, and the plate is rejected.
- Residual Stress Control: When you machine a thick plate, built-up internal stress can cause the metal to warp. We use stretching and leveling equipment to eliminate this stress, ensuring the plate stays perfectly flat during your CNC machining.
- Mechanical & Chemical Testing: We test samples for tensile strength, yield point, and elongation, and use spectrometers to guarantee the Magnesium content is exactly within the 4.0-4.9% range.
Our production strictly follows ASTM B209, EN 485, and EN 573 standards. Marine-grade certifications are also available if your structural parts are used in port machinery.
Thickness deviation of 5083 O H111 H32 aluminum sheets and strips for body panels
| Thickness | Allowable thickness tolerance within the following width range | |||
| mm | ≤1500 | ＞1500-1700 | ＞1700-2000 | ＞2000-2400 |
| 0.30-0.50 | ±0.03 | ±0.04 | - | - |
| ＞0.50-0.80 | ±0.03 | ±0.04 | ±0.04 | - |
| ＞0.80-1.20 | ±0.04 | ±0.04 | ±0.05 | ±0.06 |
| ＞1.20-2.00 | ±0.05 | ±0.05 | ±0.06 | ±0.07 |
| ＞2.00-2.50 | ±0.06 | ±0.07 | ±0.07 | ±0.08 |
| ＞2.50-3.00 | ±0.07 | ±0.08 | ±0.08 | ±0.09 |
| ＞3.00-3.50 | ±0.08 | ±0.09 | ±0.10 | ±0.11 |
Width deviation of 5083 O H111 H32 aluminum sheets and strips for body structural parts
| Thickness mm | Width tolerances within the following width ranges | |||||||
| <100.0 | >100.0- 300.0 | >300.0 - 500.0 | >500.0- 800.0 | >800.0- 1 250.0 | >1 250.0-1 800.0 | >1 800.0-2 000.0 | >2 000.0- 2 400.0 | |
| 0.30-1.60 | + 0,3 0 | + 0,4 0 | + 1.0 0 | + 1.5 0 | + 2,0 0 | + 3.0 0 | - | - |
| >1.60-3.50 | - | - | - | + 2.0 0 | 4-3.0 0 | + 4.0 0 | + 5.0 0 | + 6.0 0 |
Unevenness of 5083 O H111 H32 aluminum sheets and strips for body panel
| Thickness mm | The unevenness of sheets and strips within the following width ranges shall not be greater than | Termination area, warpage height | ||||
| <500.0 | >500.0-1 000.0 | >1 000.0-1 500.0 | >1 500.0-2 000.0 | >2 000.0 | ||
| 0.30-0.50 | 3 | 4 | 4 | 4 | - | ≤25 |
| >0.50-0.80 | 3 | 4 | 4 | 7 | 8 | |
| >0.80-1.60 | 3 | 4 | 4 | 6 | 8 | |
| >1.60-2.00 | 3 | 4 | 4 | 6 | 8 | |
| >2.00-3.50 | 3 | 4 | 4 | 6 | 8 | |
Packaging and Shipping
Packaging Standards:
We use heavy-duty wooden pallets certified under ISPM15, making customs clearance easy worldwide.
Plates are separated by protective paper, wrapped in anti-moisture plastic film, and secured with heavy-duty steel strapping.
Hard edge protection is applied to prevent any damage to the plate corners.
Shipping Logistics:
We arrange sea freight via bulk vessels or heavy-duty containers. Because we have rich experience handling heavy structural aluminum, we ensure safe loading and unloading. Standard production and delivery lead times are usually 15 to 30 days.
Pricing Guide
The price of a 5083 thick aluminum plate changes based on global metal markets and the specific processing required for your order. We use a transparent pricing formula based on the Shanghai Metals Market (SMM).
Final Price Formula = SMM Aluminum Ingot Price + Processing Fee + Premium (Heat Treatment/Logistics)
- Aluminum Ingot Price: The daily market rate for raw aluminum.
- Processing Fee: Thick plates (like 50mm or 100mm) require more time, higher energy, and strict stress-relief processing, so the manufacturing fee is different from thin sheets.
- Heat Treatment / Leveling: Costs associated with H112/H321 tempering and ensuring perfect flatness.
- Logistics: Ocean freight based on total tonnage and destination port.
Message GNEE now with your target dimensions and quantity. We will provide a transparent and highly competitive quotation within 24 hours.
Why Choose GNEE?
- Strong Capability in Thick Plates: We specialize in medium and extra-thick aluminum plates (up to 200mm) that many standard mills cannot produce.
- Mixed Specifications Accepted: We accept multi-size, mixed-batch orders, allowing you to source all your chassis parts from one supplier.
- Strict UT Inspection: Every thick plate is ultrasonically tested. We guarantee zero internal defects.
- Competitive Pricing: Our SMM-based pricing ensures you get real-time, fair factory-direct rates.
- Global Export Experience: We know exactly how to pack, ship, and handle customs for heavy aluminum products.
Inspection & Certification
We provide complete transparency and traceability for every order.
- MTC (Mill Test Certificate): Provided with every shipment, showing exact chemical and mechanical test results.
- UT Reports: Proof of ultrasonic testing for thick plates.
- Third-Party Inspection: We support pre-shipment inspections by SGS, BV, or any agency of your choice.
Contact Us
Secure the highest quality structural materials for your automotive or machinery production lines. GNEE is your trusted 5083 aluminum plate supplier.
- Free material samples available for testing.
- Professional technical consultation for your engineering team.
- Fast and accurate quotations within 24 hours.
Do you want to discuss your next big fabrication project? Email the GNEE sales team today. Let us supply the high-strength aluminum you need to build better, lighter, and stronger vehicles!
