When you need an aluminum alloy that matches the strength of many steel grades but weighs much less, 7075 aluminum is the top choice. Specifically, the 7075 T6 and T651 medium-thick aluminum plates (ranging from 8 mm to over 100 mm) are standard materials in the machining, mold-making, and equipment manufacturing industries.
As a reliable 7075 aluminum plate supplier, GNEE provides this guide to help you understand its properties, choose the right temper, and buy the exact sizes you need for your projects.
What is a 7075 Aluminum Plate?
7075 aluminum is a zinc-magnesium-copper alloy. The addition of zinc makes it one of the strongest aluminum alloys available on the market. Medium-thick plates usually refer to thicknesses between 8 mm and 100 mm (or thicker). The most commonly requested stock sizes are between 20 mm and 70 mm.
Because of its massive strength, excellent fatigue resistance, and good machinability, this aluminum grade is mainly used for high-load structural parts and precision tools.
Send us your required thickness, width, and length. GNEE will reply with a fast quote within 24 hours.
7075 Medium-Thick Aluminum Plate Chemical Composition
| Alloy | Si | Fe | Cu | Mn | Mg | Cr | Zn | Zr | Ti | Standard |
| 7075 | 0.40 | 0.50 | 1.2-2.0 | 0.30 | 2.1-2.9 | 0.18-0.28 | 5.1-6.1 | - | 0.20 | GB/AMS/EN |
Mechanical Properties of 7075 T6 vs. 7075 T651
| Property | 7075-T6 | 7075-T651 |
| Tensile Strength (MPa) | 510 – 570 | 510 – 570 |
| Yield Strength (MPa) | ≥ 430 | ≥ 430 |
| Elongation (%) | ≥ 8 | ≥ 8 |
| Stress Relieved? | No | Yes (Stretched) |
| Best For | General Strength | Heavy CNC Machining |
Why Buyers Choose 7075:
- High Strength-to-Weight Ratio: It offers steel-like strength but keeps the equipment lightweight.
- Stable Dimensions: Especially in the T651 temper, it stays flat during heavy CNC machining.
- Low Machining Allowances: Buying high-quality flat plates reduces the time and material wasted in face milling.
Common Thickness Specifications Table of 7075 Aluminum Plate
According to common market products, the standard thickness specifications of 7075 aluminum plate are as follows (unit: mm):
| Application Type | Common Thickness Specifications | Remarks |
| Thin Plate | 0.15, 0.2, 0.3, 0.4, 0.5, 0.6, 0.8, 1.0, 1.2, 1.5, 2.0, 2.5, 3.0, 4.0, 5.0, 6.0 | Mainly used for general structural parts, decoration, etc. |
| Medium Plate | 8.0, 10.0, 12.0, 15.0, 16.0, 20.0, 25.0 | Mainly used for mold manufacturing, mechanical parts, etc. |
| Thick Plate | 30.0, 40.0, 50.0, 60.0, 80.0, 100.0, 150.0, 200.0, 250.0, 300.0, 400.0, 500.0 | Mainly used for heavy structural parts, thick plate molds, etc. |
We supply standard mill finish. If requested, we can provide precision milled surfaces with PVC protective film applied on one or both sides to prevent scratches during transport.
7075 T6 vs. 7075 T651: Which Temper Do You Need?
7075 T6: This temper has been solution heat-treated and artificially aged to achieve peak strength. It is great for general high-strength applications. However, thick T6 plates hold internal stress. If you machine them heavily, they might warp or bend.
7075 T651: This temper goes through the same process as T6 but includes an extra step: stretching. The plate is stretched by 1.5% to 3% to relieve internal stress.
If your part requires heavy CNC milling, drilling, or pocketing, you must buy 7075 T651 aluminum blocks or plates. The stress relief ensures the plate stays perfectly flat after the material is removed.
Not sure if your machining process requires 7075 T6 or 7075 T651? Share your drawing or application with us. Our engineers will recommend the most cost-effective option.
Common Applications of 7075 T6 vs T651 Medium-Thick Aluminum Plate
Aerospace Industry
- 7075-T6 (For Static Load): Used for aircraft structural components. Typical parts include wing fittings, fuselage brackets, and structural reinforcement parts that do not require heavy material removal.
- 7075-T651 (For Stability): Preferred for aerospace tooling plates and precision assembly fixtures.
Mold & Tooling Industry
- 7075-T6 (For Basic Support): Used for general mold base structures or backup plates where high strength is needed, but the risk of machining deformation is low due to simple shapes.
- 7075-T651 (For Precision Machining): The choice for injection molds, blow molds, and die-casting mold components.
Mechanical Equipment Manufacturing
- 7075-T6 (For Heavy Frames): Ideal for high-load structural components, heavy-duty machine frames, and static brackets used in automation lines where minimal machining is required.
- 7075-T651 (For Moving Parts): Extensively used for precision-machined gears, driving shafts, robotic arms, and high-speed automation structures.
Automotive & Motorsport
- 7075-T6 (For Reinforcement): Common in high-strength chassis reinforcement plates and basic suspension components where extreme machining complexity is not a factor.
- 7075-T651 (For Racing Parts): Highly demanded by CNC shops making custom racing parts. T651 is used for lightweight precision hubs, adapters, and complex suspension geometries requiring perfect post-machining accuracy.
Defense & High-End Engineering
- 7075-T6 (For Impact & Support): Used in high-strength armor support structures, heavy load-bearing brackets, and basic mechanical supports for military vehicles.
- 7075-T651 (For Accuracy): Sourced for precision military components, weapon system mounts, and tactical equipment that demand high machining accuracy and long-term stability under harsh conditions.
| Application Scenario | Recommended Temper | Reason |
| Maximum strength, minimal machining | 7075-T6 | Higher cost-efficiency for simple shapes |
| Heavy CNC machining, tight tolerances | 7075-T651 | No internal stress, stays perfectly flat |
| Risk of deformation must be minimized | 7075-T651 | Stretched during production to prevent warping |
| Cost-sensitive, simpler static structures | 7075-T6 | Skips the stretching process, slightly lower cost |
As a premium aluminum supplier, GNEE stocks both tempers in various thicknesses. Send us your specs today and get a factory-direct quote!
Recommended Thickness for Different Uses
| Application | Recommended Thickness Range |
| CNC Machining Fixtures & Blocks | 20 mm – 70 mm |
| Precision Injection Molds | 20 mm – 60 mm |
| Aerospace & Military Structural Parts | 10 mm – 50 mm |
| Heavy Machinery Base Plates | 40 mm – 100 mm+ |
Note: GNEE supports multi-size orders. You can order various thicknesses and custom cut-to-size blocks in a single shipment.
7075 Aluminum Thin Plate Thickness Tolerance Table (unit: mm)
| Nominal Thickness | Width ≤ 1000 mm | 1000 mm < Width ≤ 1500 mm | 1500 mm < Width ≤ 2000 mm | 2000 mm < Width ≤ 2500 mm |
| 0.20-0.40 | ±0.04 | ±0.04 | ±0.05 | - |
| 0.40-0.50 | ±0.05 | ±0.05 | ±0.05 | ±0.09 |
| 0.50-0.60 | ±0.05 | ±0.05 | ±0.05 | ±0.09 |
| 0.60-0.80 | ±0.06 | ±0.06 | ±0.08 | ±0.10 |
| 0.80-1.00 | ±0.07 | ±0.08 | ±0.09 | ±0.11 |
| 1.00-1.20 | ±0.08 | ±0.09 | ±0.10 | ±0.14 |
| 1.20-1.50 | ±0.10 | ±0.11 | ±0.13 | ±0.15 |
| 1.50-1.80 | ±0.12 | ±0.13 | ±0.14 | ±0.15 |
| 1.80-2.00 | ±0.13 | ±0.14 | ±0.16 | ±0.17 |
| 2.00-2.50 | ±0.15 | ±0.16 | ±0.18 | ±0.19 |
| 2.50-3.00 | ±0.18 | ±0.20 | ±0.22 | ±0.24 |
| 3.00-4.00 | ±0.22 | ±0.25 | ±0.27 | ±0.29 |
| 4.00-5.00 | ±0.25 | ±0.28 | ±0.30 | ±0.33 |
| 5.00-6.00 | ±0.30 | ±0.33 | ±0.35 | ±0.38 |
7075 Aluminum Medium and Thick Plate Thickness Tolerance Table (unit: mm)
| Nominal Thickness | Width ≤ 1000 mm | 1000 mm < Width ≤ 1500 mm | 1500 mm < Width ≤ 2000 mm | 2000 mm < Width ≤ 2500 mm |
| 6.0-8.0 | ±0.35 | ±0.40 | ±0.45 | ±0.50 |
| 8.0-10.0 | ±0.45 | ±0.50 | ±0.55 | ±0.60 |
| 10.0-12.0 | ±0.50 | ±0.60 | ±0.65 | ±0.75 |
| 12.0-15.0 | ±0.60 | ±0.70 | ±0.75 | ±0.85 |
| 15.0-20.0 | ±0.75 | ±0.85 | ±0.90 | ±1.00 |
| 20.0-25.0 | ±0.90 | ±1.00 | ±1.10 | ±1.20 |
| 25.0-30.0 | ±1.00 | ±1.10 | ±1.20 | ±1.30 |
| 30.0-40.0 | ±1.20 | ±1.30 | ±1.40 | ±1.50 |
| 40.0-50.0 | ±1.30 | ±1.40 | ±1.50 | ±1.60 |
Quality Control & Inspection
To ensure 100% reliability, GNEE performs strict quality checks:
- Chemical Spectrometer Testing: Ensures the Zinc and Magnesium levels are exact.
- Mechanical Testing: We test tensile strength and hardness before delivery.
- Ultrasonic Testing (UT): Every thick plate (especially above 40mm) undergoes UT scanning to guarantee there are no internal cracks or air holes.
- Flatness Inspection: Checked with precision straight edges and laser tools.
We provide a Mill Test Certificate (MTC) for every single batch of 7075 aluminum plate we ship.
Do you require a sample MTC or specific ultrasonic testing reports before placing an order? Email our sales team to get all the documents you need.
Request MTC & Quality Documents
Packaging and Delivery
- Packaging: Every aluminum plate is wrapped in waterproof plastic film and kraft paper. Desiccants are added to absorb moisture. The plates are then strapped tightly onto export-standard fumigated wooden pallets. Edge protectors are added to prevent corner damage.
- Delivery: We hold a strong inventory of 20mm–70mm plates. For stock sizes, we can arrange fast delivery to the port. We support sea freight, air freight, and land transport depending on your location and urgency.
How the Price is Calculated
Buyers always want to know the 7075 aluminum plate price. In the international trade market, the price is not fixed; it fluctuates daily.
GNEE bases pricing on the SMM (Shanghai Metal Market) aluminum ingot price. Our formula is transparent:
Total Price = SMM Aluminum Ingot Price + Alloy & Temper Premium (7075 T651) + Processing/Cutting Fee
Factors that affect your final quote include:
- Order Volume: Full container loads (FCL) get better per-kilogram prices than Less than Container Loads (LCL).
- Processing: Buying full standard sheets (e.g., 1500mm x 3000mm) is cheaper per kg than buying 50 different small cut-to-size blocks.
- Temper: T651 is slightly more expensive than T6 due to the extra stretching process.
Why Choose GNEE as Your Supplier?
- Mixed Multi-Size Orders: We don't force you to buy one size. You can mix 20mm, 45mm, and 60mm plates in a single order. Ideal for project-based procurement.
- Fast Inventory Response: We keep heavy stock of standard thicknesses (20mm to 70mm) for immediate cutting and shipping.
- Precision Processing: Our in-house heavy duty panel saws ensure clean cuts, leaving you with minimal machining allowance.
- Complete Export Experience: From secure wooden packing to handling customs documents, we ensure your metal arrives safely at your factory door.
