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7075-T73 aluminum sheet plate is one of the highest-strength aluminum alloys widely used in aerospace, military, tooling, and precision engineering industries. Compared with standard 7075-T6 aluminum plate, the T73 temper provides significantly improved resistance to stress corrosion cracking while maintaining outstanding mechanical strength and fatigue performance.
At Xi'an Dongmeng Group Co., Ltd, we specialize in manufacturing and exporting aerospace-grade 7075-T73 aluminum sheet and plate for global industrial buyers, CNC machining companies, aerospace contractors, and heavy equipment manufacturers. Our products are produced under strict quality control systems and comply with international ASTM and AMS specifications.
As a professional aluminum alloy factory supplier, we provide:
Large inventory of 7075-T73 aluminum plates
Precision cut-to-size processing
CNC machining support
Mill test certification (MTC EN10204 3.1)
Third-party inspection
Export packaging solutions
Fast international shipment
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High Quality
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Advanced Equipment
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Professional Team
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Custom Service
What is 7075-T73 Aluminum?
7075-T73 aluminum is a heat-treated wrought aluminum-zinc alloy developed for applications requiring extremely high strength and enhanced corrosion resistance. The T73 temper is an over-aged condition specifically designed to reduce susceptibility to stress corrosion cracking.
Compared with 7075-T6:
| Property | 7075-T6 | 7075-T73 |
|---|---|---|
| Tensile Strength | Higher | Slightly Lower |
| Stress Corrosion Resistance | Moderate | Excellent |
| Structural Stability | Good | Superior |
| Aerospace Reliability | High | Very High |
This makes 7075-T73 aluminum plate particularly suitable for aircraft structural parts, aerospace tooling, military equipment, and high-load CNC machined components.
Products Specification
| Category | Specification |
|---|---|
| Product Name | 7075-T73 Aluminum Sheet / Plate |
| Alloy Series | 7xxx Series Aluminum Alloy (Al-Zn-Mg-Cu) |
| Temper | T73 (Solution Heat-Treated & Naturally Aged) |
| Standards | ASTM B209 · EN AW-7075 · AMS 4045 |
| Form | Sheet / Plate / Cut-to-Size |
| Thickness Range | 0.5 – 200 mm (0.020″ – 7.87″) |
| Width Range | 500 – 2500 mm (19.7″ – 98.4″) |
| Length Range | Up to 15,000 mm (≤ 590″) |
| Thickness Tolerance | Per ASTM B209 / EN AW-7075 |
| Flatness Tolerance | Standard mill tolerances |
| Surface Finish | Mill Finish · Bright Annealed · Polished / Brushed |
| Edge Condition | Mill Edge · Trimmed Edge |
| Density | 2.81 g/cm³ |
| Ultimate Tensile Strength | 524 MPa |
| Yield Strength | 455 MPa |
| Elongation | 11% |
| Brinell Hardness | 140 HB |
| Fatigue Strength | 150 MPa |
| Chemical Composition (% Typical) | Zn 5.1–6.1 · Mg 2.1–2.9 · Cu 1.2–2.0 · Cr 0.18–0.28 · Fe ≤0.5 · Si ≤0.4 · Mn ≤0.3 · Ti ≤0.2 · Al Balance |
| Key Properties | High Strength · Excellent Stress Corrosion Resistance · Good Fatigue Resistance · Machinable |
| Processing Capability | CNC Machining · Cutting · Bending · Milling · Precision Fabrication |
| Typical Applications | Aerospace Components · Military Equipment · High-Stress Structural Parts · Automotive High-Performance Parts · Marine & Offshore Structures |
| Inspection & Certification | Mill Test Certificate (EN 10204 3.1) · Optional Third-Party Inspection (SGS / BV / TUV) |
| Packaging & Delivery | Export-Grade Wooden Pallets / Crates · Protective Film · Cut-to-Size Service Available |
| Customization | Thickness · Width · Length · Surface Finish · Processing Services |
Executive Standards
| Standard | Description |
|---|---|
| ASTM B209 | Aluminum and Aluminum-Alloy Sheet and Plate |
| AMS 4045 | Aerospace Aluminum Alloy Plate |
| AMS QQ-A-250/12 | Aerospace Aluminum Alloy Specification |
| EN 485 | Aluminum Sheet & Plate Standards |
| GB/T 3880 | Chinese Aluminum Alloy Standard |
Chemical Composition (% Typical)
| Element | Zn | Mg | Cu | Cr | Fe | Si | Mn | Ti | Al |
|---|---|---|---|---|---|---|---|---|---|
| Content | 5.1–6.1 | 2.1–2.9 | 1.2–2.0 | 0.18–0.28 | ≤0.5 | ≤0.4 | ≤0.3 | ≤0.2 | Balance |
Mechanical Properties – T73 Temper
| Property | Value | Unit |
|---|---|---|
| Ultimate Tensile Strength | 524 | MPa |
| Yield Strength | 455 | MPa |
| Elongation | 11 | % |
| Brinell Hardness | 140 | HB |
| Fatigue Strength | 150 | MPa |
Physical Properties
| Property | Value |
|---|---|
| Density | 2.81 g/cm³ |
| Melting Range | 477 – 635°C |
| Thermal Conductivity | 130 W/m·K |
| Electrical Conductivity | 33% IACS |
| Elastic Modulus | 71.7 GPa |
| Thermal Expansion | 23.6 µm/m·°C |
Processing Performance Analysis
Excellent CNC Machining Performance
7075-T73 aluminum plate is highly preferred in CNC machining industries because of its:
High dimensional stability
Low deformation after machining
Excellent chip formation
High-speed cutting capability
Superior surface finish
The alloy is widely used for:
Aerospace precision components
High-strength tooling plates
Mold bases
Robotics structural parts
Defense equipment components
Heat Treatment Stability
The T73 temper provides improved microstructural stability after aging treatment, making it ideal for precision-machined industrial applications exposed to cyclic loads or harsh environments.
Welding Performance Analysis
7075 series aluminum alloys are generally not recommended for conventional fusion welding due to potential hot cracking and reduced mechanical properties in welded zones.
However, 7075-T73 aluminum can still be processed through:
Friction stir welding (FSW)
Mechanical fastening
Riveting systems
Aerospace structural assembly
For critical structural applications, machining and bolted assembly are preferred over welding.
Corrosion Resistance Analysis
Compared with 7075-T6 aluminum, 7075-T73 aluminum sheet plate provides significantly enhanced resistance to:
Stress corrosion cracking
Exfoliation corrosion
Atmospheric corrosion
Marine industrial environments
This makes the alloy highly suitable for:
Aerospace exterior structures
Offshore mechanical systems
Military equipment
High-humidity industrial environments
Industry Applications of 7075-T73 Aluminum Sheet Plate
Aerospace Industry
Applications
Aircraft wing structures
Fuselage frames
Aerospace fasteners
Landing gear support components
Structural reinforcement plates
Benefits
Exceptional strength-to-weight ratio
Improved fatigue resistance
Long-term structural reliability
CNC Machining Industry
Applications
Precision machined parts
CNC tooling plates
Robot structural components
High-load machine frames
Benefits
Stable machining performance
Reduced material deformation
Excellent surface finish quality
Defense & Military Industry
Applications
Armored vehicle components
Military structural systems
Tactical equipment frames
Defense aerospace assemblies
Benefits
High impact resistance
Lightweight structural efficiency
Excellent mechanical reliability
Mold & Tooling Industry
Applications
Plastic mold bases
Fixture tooling
Precision industrial molds
High-strength support plates
Benefits
Dimensional stability
Long tooling lifespan
Excellent machinability
Production Capability
Xi'an Dongmeng Group Co., Ltd maintains advanced aluminum processing and inspection systems to support global industrial supply requirements.
Our Manufacturing Advantages
Large-scale aluminum inventory
Aerospace-grade production control
Precision leveling equipment
CNC processing support
Strict dimensional tolerance control
Export-oriented packaging systems
Supply Capacity
Monthly Production Capacity: 5,000+ Tons
Fast Delivery for Standard Sizes
Custom Processing Available
OEM/ODM Industrial Support
Inspection & Quality Assurance
Incoming Material Inspection: Chemical composition, raw material verification, supplier qualification.
In-Process Inspection: Thickness, flatness, surface quality, and hardness checks.
Mechanical Testing: Tensile, yield, elongation, and fatigue tests per ASTM/EN standards.
Final Inspection: Visual and dimensional inspection, packaging verification, Mill Test Certificate (EN 10204 3.1).
Third-Party Inspection: Optional inspection by SGS, BV, or TUV.
Why Choose Us
Factory-Direct Aluminum Supplier
Professional industrial metal manufacturer
Stable raw material supply chain
Competitive factory pricing
Rich Export Experience
Global export service
Familiar with ASTM/AMS requirements
International logistics coordination
Precision Processing Capability
CNC cutting support
Custom dimensions available
Tight tolerance machining
Reliable Quality System
Aerospace-grade inspection standards
Third-party testing support
Full traceability management
Fast Response for B2B Buyers
Technical consultation
Rapid quotation service
Engineering support
Contact Us
If you are interested in 7075-T73 Aluminum Sheet / Plate or want to request a custom size, thickness, or processing service, please contact us directly. Our professional sales and technical team is ready to provide fast quotes, detailed specifications, and support for your project.
Our address
Room 4107, Runfeng Building, Sanqiao New Street, Weiyang District, Xi'an City, Shaanxi Province
Phone Number
+86 15769214734
FAQ
Q1: What is 7075-T73 aluminum sheet?
A: 7075-T73 is a high-strength aluminum alloy with enhanced stress corrosion resistance. It is slightly lower in tensile strength than T6 but offers better durability in harsh environments.
Q2: Which standards does 7075-T73 meet?
A: ASTM B209, EN AW-7075, AMS 4045. Mill Test Certificates (EN 10204 3.1) are available.
Q3: Can 7075-T73 be welded?
A: Welding is not recommended due to stress corrosion concerns. Mechanical fastening or adhesive bonding is preferred.
Q4: Can it be machined?
A: Yes. 7075-T73 is machinable using CNC, milling, turning, or drilling methods.
Q5: What thicknesses and sizes are available?
A: Thickness 0.5–200 mm, width 500–2500 mm, length up to 15,000 mm. Custom sizes are available.
Q6: What is the corrosion resistance?
A: 7075-T73 has excellent stress corrosion resistance, suitable for aerospace, marine, and outdoor applications. Protective coatings are recommended for extreme environments.
Q7: What are typical applications?
A: Aerospace components, military equipment, high-stress automotive parts, industrial machinery, and marine/offshore structures.
Q8: How is it packaged and shipped?
A: Export-grade wooden pallets or crates, waterproof paper, plastic film protection, and secure strapping.
Q9: Can it be customized?
A: Yes. Thickness, width, length, surface finish, and processing services can be customized per project requirements.
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