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1. Product Overview
The 7075-T6 Aluminum Round Bar is a high-strength, “aircraft-grade” aluminum alloy engineered for applications where superior strength-to-weight ratio and structural integrity are paramount . As a member of the 7000-series (aluminum-zinc-magnesium-copper alloy system), 7075 is renowned as one of the strongest commercially available aluminum alloys, delivering tensile strength comparable to many structural steels while maintaining the lightweight characteristics inherent to aluminum .
The T6 temper indicates that the material has undergone solution heat treatment followed by artificial aging, a process that achieves peak hardness and optimal mechanical properties . This makes the 7075-T6 aluminum round bar the preferred choice for mission-critical components across the aerospace, defense, automotive, and high-performance industrial sectors .
2. Key Features & Benefits
High Strength-to-Weight Ratio
7075-T6 delivers an exceptional balance of strength and lightness. With an ultimate tensile strength of 83 KSI (572 MPa) and a yield strength of 73 KSI (503 MPa), it provides the structural performance required for highly stressed applications while significantly reducing component weight .
Excellent Fatigue Resistance
The alloy withstands repeated stress cycles effectively, ensuring long service life under cyclic loading conditions commonly encountered in aerospace and high-performance mechanical systems .
Good Machinability
7075-T6 offers a machinability rating of approximately 70% (compared to 2011 alloy), enabling efficient turning, milling, drilling, and threading operations. It can be machined to tight tolerances with appropriate tooling and process control .
Superior Corrosion Resistance (with Treatment)
While the alloy’s high zinc content makes it more susceptible to corrosion than 6000-series alloys, proper surface treatments—such as anodizing, cladding (Alclad), or protective coatings—effectively mitigate environmental degradation .
Heat Treatable
The T6 temper is achieved through solution heat treatment and artificial aging, allowing for peak strength and hardness optimization .
3. Chemical Composition (7075 Aluminum)
| Element | Percentage |
|---|---|
| Aluminum (Al) | 90.0% |
| Zinc (Zn) | 5.1 – 6.1% |
| Magnesium (Mg) | 2.1 – 2.9% |
| Copper (Cu) | 1.2 – 2.0% |
| Chromium (Cr) | 0.18 – 0.28% |
| Silicon (Si) | 0.40% max |
| Iron (Fe) | 0.50% max |
| Manganese (Mn) | 0.30% max |
| Titanium (Ti) | 0.20% max |
Data sourced from industry standards ASTM B211 and AMS specifications
4. Mechanical Properties (Typical Values – T6 Temper)
| Property | Value (Imperial) | Value (Metric) |
|---|---|---|
| Ultimate Tensile Strength | 83,000 psi | 572 MPa |
| Yield Strength (0.2% offset) | 73,000 psi | 503 MPa |
| Elongation (in 2″) | 11% | 11% |
| Shear Strength | 48,000 psi | 331 MPa |
| Brinell Hardness | 150 HB | 150 HB |
| Rockwell Hardness (B Scale) | 87 HRB | 87 HRB |
| Fatigue Strength | ~23,000 psi | ~159 MPa |
Typical values per ASTM B211 and AMS 4122 standards
5. Physical Properties
| Property | Value |
|---|---|
| Density | 3.00 g/cm³ (0.108 lb/in³) |
| Melting Point | 890 – 1180°F (477 – 638°C) |
| Electrical Conductivity | 33% IACS |
| Machinability Rating | 70% of 2011 alloy |
| Elastic Modulus | 71 GPa (10,300 ksi) |
Physical properties of 7075 aluminum alloy
6. Specifications & Standards
Our 7075-T6 aluminum round bars are manufactured and tested in full compliance with major international standards:
- ASTM B211 – Standard Specification for Aluminum and Aluminum-Alloy Bar, Rod, and Wire
- ASTM B221 – Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Profiles, and Tubes
- AMS 4122 – Aluminum Alloy, 7075, Bar, Rod, and Wire
- AMS 4123 – Aluminum Alloy, 7075, Bar, Rod, and Wire (Cold Finished)
- QQ-A-225/9 – Federal Specification for Aluminum Alloy 7075 Bar, Rod, and Wire
- EN 573 / EN 755 – European Standards for Aluminum and Aluminum Alloys
Color Marking: Ends painted Black for easy identification
7. Size Range & Customization
| Parameter | Range |
|---|---|
| Diameter | 5 mm – 350 mm (0.20″ – 14″) |
| Length | 1,000 mm – 6,000 mm (custom lengths available) |
| Production Method | Extruded or Cold Finished |
| Surface Finish | Mill finish, anodized, or coated |
| Tolerance | Per ASTM standards; tighter tolerances available upon request |
Custom sizes and specifications available upon request.
8. Applications
The 7075-T6 aluminum round bar is the material of choice for high-stress, high-reliability environments :
Aerospace & Defense
- Aircraft structural components and airframes
- Fittings, gears, shafts, and fuse parts
- Missile components and landing gear parts
- High-stress airframe structures and bulkheads
Automotive & Motorsports
- High-performance chassis and suspension components
- Racing vehicle structural parts
- Drive shafts and transmission components
Industrial & Mechanical Engineering
- High-stress mechanical parts and precision molds
- Robotic arms and automation equipment
- Hydraulic valve bodies and regulating valves
- Tooling, fixtures, and jigs
Sporting Goods & Consumer
- High-performance bicycle frames and wheels
- Climbing equipment and golf club heads
Semiconductor & Medical Equipment
- Precision tooling for semiconductor manufacturing
- Medical device components requiring high strength and stability
9. Important Considerations
Machining Guidelines
7075-T6 has a machinability rating of approximately 70% of 2011 alloy . For automatic screw machine operations, 7075 in the T6 condition is rated between 75% and 85% of 2011 . Sharp tooling and proper coolant application are recommended to achieve optimal surface finishes and dimensional accuracy.
Weldability
Arc and gas welding are not recommended for 7075 aluminum due to its susceptibility to cracking and stress corrosion in the heat-affected zone . Spot or flash welding may be used in limited applications . For assemblies requiring joining, mechanical fastening or adhesive bonding are preferred alternatives.
Corrosion Protection
Due to its high zinc content, 7075-T6 has lower corrosion resistance than 6000-series alloys . For exposure to corrosive or high-moisture environments, protective anodizing, cladding (Alclad), or organic coatings are strongly recommended . The T6 (peak aging) temper is most susceptible to stress corrosion cracking; over-aged tempers such as T7351 offer improved SCC resistance at a moderate strength reduction .
Material Certification
Full material test reports (MTRs) with lot traceability are available upon request .
10. Why Choose Our 7075-T6 Aluminum Round Bar?
- Proven Quality – Manufactured to strict ASTM, AMS, and federal specifications with full traceability
- Wide Inventory – Extensive stock of diameters and lengths ensures fast delivery
- Technical Expertise – Our engineering team provides expert material selection and application support
- Custom Solutions – Flexible customization for diameter, length, tolerance, and surface treatment
- Competitive Pricing – Direct manufacturing and efficient supply chain deliver premium quality at competitive prices
- Reliability – 7075-T6 ensures long service life, lower failure risk, and reduced maintenance costs
11. Get a Quote Today
Contact our sales team to discuss your 7075-T6 aluminum round bar requirements. Whether you need standard stock sizes or custom specifications, we are ready to deliver the high-performance aluminum solutions your mission-critical applications demand.
All data and specifications are provided for reference purposes only and are not intended for design use. Mechanical properties are typical values and may vary with dimensions and processing. Please consult with our technical team for specific application requirements.
