5052-H38 aluminum sheet is widely used for road traffic signs because it combines high strength (up to 260 MPa), excellent corrosion resistance, and good surface reflectivity. Compared with standard 3003 aluminum, it offers 30–50% higher strength and a significantly longer service life, making it the ideal base material for outdoor traffic signage exposed to high wind loads and harsh weather environments.
What is a 5052-H38 Aluminum Sheet?
5052 aluminum belongs to the 5000 series (Aluminum-Magnesium alloy). Magnesium is the primary alloying element, which gives this metal excellent resistance to rust and corrosion, especially in saltwater or industrial environments.
The "H38" refers to the temper (the hardness and state of the metal). H38 means the aluminum has been heavily strain-hardened and stabilized. In the non-heat-treatable aluminum family, H38 provides the highest level of strength and rigidity.
5052 Aluminum Sign Blanks Sheets Chemical Composition |
|||||||||||||
| Si | Fe | Cu | Mn | Mg | Cr | Ni | Zn | Ti | Ga | V | Others | Aluminum Min. | |
| Each | Total | ||||||||||||
| 0.25 | 0.4 | 0.1 | 0.1 | 2.2-2.8 | 0.15-0.35 | - | 0.10 | - | - | - | 0.05 | 0.15 | Remainder |
5052 Aluminum Sign Blanks Sheets Physical Property |
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| Temper | Thickness (mm) | Tension Strength Rm Mpa | Yield Strength Rp0.2 Mpa |
Elongation Min. % |
Bend Radius | Hardness HBW |
||||
| Over | Up to | Min. | Max. | Min. | Max. | A 50 mm | 180° | 90° | ||
| H38 | 1.5 | 3.0 | 270 | 210 | 3 | 81 | ||||
The Product Specification of 5052 Aluminum Sheet Plate
|
Alloy |
5052 aluminum sheet plate |
|
Temper |
F, O, H12, H14, H16, H18, H19, H22, H24, H26, H28, H32, H34, H36, H38, H111, H112, H114, etc. |
|
Thickness (mm) |
1.0-600 |
|
Width (mm) |
100-2650 |
|
Length (mm) |
500-16000 |
|
Surface treatment |
Rolled, patterned aluminum plate |
|
Package |
Export packaging (protective film, interleaved paper) |
|
Certificate |
CCS, DNV, ABS, BV |
|
Application |
Alumina plates, silos, automotive aluminum plates, molds, mask machines, electronic stamping parts, can lid materials, etc. |
Why 5052-H38 aluminum plate is Used for Traffic Signs
1. High Wind Resistance
Large highway overhead signs face massive wind pressure. If the metal is too soft, the sign will bend permanently under heavy wind. Because 5052-H38 has a high yield strength, it maintains its flat shape even during heavy storms, ensuring drivers can always read the directions clearly.
2. Outdoor Durability and Corrosion Resistance
Traffic signs are constantly exposed to rain, snow, UV rays, and road salt. Steel will rust, and lower-grade aluminum may oxidize quickly. 5052 aluminum has outstanding natural corrosion resistance. It does not require frequent replacement, saving thousands of dollars in maintenance labor.
3. Reflective Film Adhesion
5052-H38 aluminum sheets are manufactured with strict surface flatness controls. A completely flat, clean surface ensures that premium reflective films stick tightly without air bubbles or peeling.
4. Lightweight Structure
Although it is strong, 5052-H38 is still aluminum. It is incredibly lightweight compared to steel. This means construction workers can install large overhead signs faster and safely, and the structural support poles do not need to be massively over-engineered.
Thickness & Size Range
Different roads require different sign sizes. A small parking lot sign does not need the same thickness as a massive highway exit board. GNEE supplies a wide range of custom dimensions to fit your exact project requirements.
| Item | Available Range |
| Thickness | 0.8 mm – 4.0 mm |
| Width | 100 mm – 2000 mm |
| Length | Custom cut to your length |
| Flatness Tolerance | ≤2 mm/m (Strictly controlled) |
| Thickness Tolerance | ±0.02 – 0.05 mm |
Typical Thickness Guide:
- 0.8 mm – 1.2 mm: Small warning signs, indoor parking signs.
- 1.5 mm – 2.0 mm: Standard urban city road signs.
- 2.5 mm – 3.0 mm: Highway signs, large overhead guide boards.
Send us your required sizes and thicknesses today. GNEE accepts multi-size mixed orders with flexible MOQs. Contact us now for a fast factory-direct quotation.
5052 vs 3003 aluminum plate for Traffic Signs
| Property | 5052-H38 | 3003-H14 |
| Tensile Strength | 230 – 260 MPa | 120 – 150 MPa |
| Yield Strength | ≥200 MPa | ~110 MPa |
| Wind Resistance | Excellent (No bending) | Moderate (May bend under high wind) |
| Service Life | 8 – 12+ years | 5 – 8 years |
| Material Cost | Higher | Lower |
| Application | Signage for highways, coastal cities, high-wind areas, or high-quality infrastructure projects. | Temporary construction signs, indoor signs, or standard city signs. |
Applications in Infrastructure of 5052-H38 aluminum sheets
Road & Transportation:
- Highway and expressway overhead guide signs.
- Urban traffic direction signs.
- Stop signs, speed limit signs, and hazard warning signs.
Industrial & Infrastructure:
- Airport runway and terminal directional signage.
- Railway and train station safety markers.
- Commercial parking lot navigation systems.
- Mining site safety warning boards.
Every shipment from GNEE includes a detailed Mill Test Certificate (MTC), and we fully support third-party inspections like SGS. Email us today to get a sample for your quality testing lab.
Packaging & Shipping
We export wholesale aluminum for road signs worldwide. Proper packaging is essential to prevent edge damage and moisture oxidation during long ocean voyages.
Our standard export packaging includes:
- Surface Protection: A clear PVC film is applied to the front side to prevent scratches during transport and cutting.
- Moisture Barrier: The stacked sheets are wrapped completely in waterproof kraft paper and plastic shrink wrap.
- Structural Support: Loaded onto heavy-duty fumigated wooden pallets.
- Fixing: Strapped down with heavy steel strips and fitted with rigid corner protectors to prevent edge denting.
Shipping Lead Times:
Standard stock sizes: 7 – 15 days to the export port.
Custom cutting and large-volume orders: 20 – 30 days.
SMM Price Reference Example
Pricing Formula:
Raw Aluminum Price (SMM A00) + Factory Processing Fee = Final EXW Price
- SMM Price: The daily raw material base price from the Shanghai Metals Market.
- Processing Fee: The cost to roll, heat-treat, cut, and package the 5052-H38 aluminum.
Example Price Calculation:
- SMM Aluminum Ingot Price: 19,200 RMB / ton
- 5052-H38 Processing Fee: +3,000 RMB / ton
- Final Estimated Price: ≈22,200 RMB / ton (Convert to USD based on the daily exchange rate).
Note: The processing fee varies slightly depending on your required thickness and width. Thinner sheets require more rolling time and have a slightly higher processing fee.
Payment Terms
To build long-term trust with global contractors and sign manufacturers, GNEE offers standard international payment terms:
- T/T (Telegraphic Transfer): 30% deposit to start production, and 70% balance paid before shipment.
- L/C at Sight: For large-volume government project orders, we accept a 100% irrevocable Letter of Credit at sight.
- Flexible Terms: Available for our VIP long-term partner clients.
Why Choose GNEE as Your Supplier?
When you buy 5052-H38 aluminum sheet, you are buying the foundation of road safety. GNEE is a trusted manufacturing partner with over 18 years of aluminum export experience.
Our Core Advantages:
- Multi-Size Mixed Orders: Most sign makers need small, medium, and large panels. We allow you to mix different custom cuts into a single shipping container.
- Custom Slitting & Cutting: We cut the sheets to your exact drawing sizes, saving your factory time and reducing scrap waste.
- Global Reach: We have successfully supplied infrastructure projects in over 70 countries.
- Fast Response: Our global sales team provides detailed quotations within 24 hours.
FAQ
Q1: What thickness is best for traffic signs?
It depends entirely on the size of the sign and local wind loads. Typically, 1.5 mm to 2.0 mm is used for standard city roads, while 2.5 mm to 3.0 mm is strictly required for large highway overhead signs to prevent bending.
Q2: Why use 5052 aluminum instead of galvanized steel?
Aluminum is much lighter, making installation faster and safer. More importantly, aluminum has natural corrosion resistance. Even if the surface is scratched, it will not rust and cause the reflective film to fall off, whereas steel requires constant maintenance.
Q3: Can 5052 aluminum be used safely in coastal areas?
Yes, 5052 is an Aluminum-Magnesium marine-grade alloy. It performs exceptionally well in high-salt, high-humidity coastal environments, far outperforming 3003 aluminum and carbon steel.
Q4: Do you supply aluminum circles or triangle blanks for signs?
Yes, in addition to standard rectangular sheets, we can supply pre-cut aluminum blanks in circles, triangles, and octagons based on your specific traffic sign designs.
Looking for 5052-H38 Aluminum Sheet for Traffic Sign Projects?
Stop wasting budget on materials that bend under wind pressure or reject reflective films. Build long-lasting, readable, and safe road networks with premium 5052-H38 aluminum.
GNEE provides:
✔ Custom sizes and exact thickness control for different road standards.
✔ Stable, flat surface quality ready for premium reflective films.
✔ Highly competitive and transparent pricing based on the SMM.
Secure your material supply chain today. Send us your complete material list, and our engineers will provide exact thickness recommendations, the latest daily price, and arrange free samples for your testing. Contact GNEE now!
