PROGRÈS
Product Overview
6061-T6/T651 Aluminum Round Bar – The World‘s Most Versatile, Heat-Treatable Aluminum Alloy for Precision Engineering & Structural Applications
6061 aluminum round bar is the most widely used aluminum alloy in the world, renowned for its exceptional combination of strength, résistance à la corrosion, workability, and affordability. Available in T6 and T651 tempers, this heat-treatable aluminum alloy delivers reliable performance across aerospace, automobile, Marin, construction, and general manufacturing industries.
Le 6061 aluminum round bar offers good mechanical strength, moderate machinability, and outstanding corrosion resistance. Its surface is easily treated through processes such as anodizing, forming an attractive and durable protective layer. Whether used for precision structural components or appearance parts, le 6061 aluminum round bar is a reliable and cost-effective choice.
Key Features & Benefits
Exceptional Strength-to-Weight Ratio
With an ultimate tensile strength of 45,000 psi (310 MPa) and a yield strength of 40,000 psi (276 MPa), 6061 aluminum provides substantial structural integrity at only one-third the weight of steel. This lightweight characteristic translates to easier handling, reduced transportation costs, and improved fuel efficiency in end-use applications.
Outstanding Corrosion Resistance
6061 aluminum naturally forms a protective oxide layer that provides above-average resistance to corrosion. This makes it ideal for use in marine environments, chemically contaminated conditions, et applications extérieures, ensuring long service life with minimal maintenance.
Excellente machinabilité
6061-T6/T651 offers a machinability rating of 50%, enabling efficient turning, forage, fraisage, and threading operations. The alloy delivers good chip characteristics and can achieve tight dimensional tolerances.
Superior Weldability
6061 aluminum exhibits excellent weldability. Thinner sections can be welded using gas tungsten arc welding (GTAW/TIG), while heavier sections can be joined using gas metal arc welding (GMAW/MIG). Filler alloys such as 4043 ou 5356 are commonly recommended.
Good Formability & Workability
The alloy can be easily formed and worked, with standard methods used for bending, estampillage, emboutissage profond, et opérations de filage.
Heat Treatable for Enhanced Strength
6061 aluminum can be strengthened through heat treatment to achieve higher strength and hardness. The T6 and T651 tempers represent the solution heat-treated and artificially aged conditions, delivering optimal mechanical properties.
Versatile Surface Finishing
Available in mill finish, brillant, anodisé, or coated surfaces to meet specific aesthetic and functional requirements.
Composition chimique (6061 Aluminium)
| Élément | Percentage |
|---|---|
| Aluminium (Al) | 95.8 – 98.6% |
| Silicium (Et) | 0.40 – 0.80% |
| Magnésium (Mg) | 0.80 – 1.20% |
| Cuivre (Cu) | 0.15 – 0.40% |
| Chrome (Cr) | 0.04 – 0.35% |
| Fer (Fe) | 0.70% max |
| Zinc (Zn) | 0.25% max |
| Manganèse (Mn) | 0.15% max |
| Titane (De) | 0.15% max |
Composition information provided by the Aluminum Association
Propriétés mécaniques (Typical Values)
| Propriété | T6 Temper | T651 Temper |
|---|---|---|
| Ultimate Tensile Strength | 45,000 psi (310 MPa) | 46,000 psi (317 MPa) |
| Limite d'élasticité (0.2% offset) | 40,000 psi (276 MPa) | 39,000 – 40,000 psi |
| Elongation in 2″ | 12% | 11 – 12% |
| Résistance au cisaillement | 30,000 psi (207 MPa) | 30,000 psi |
| Brinell Hardness | 95 | 93 – 95 |
| Dureté Rockwell (B Scale) | 60 | 59 – 60 |
| Résistance à la fatigue | 14,000 psi (96.5 MPa) | 14,000 psi |
| Module d'élasticité | 10,000 ksi (68.9 GPa) | 10,000 ksi |
Data from Aluminum Association and industry standards
Propriétés physiques
| Propriété | Valeur |
|---|---|
| Densité | 2.70 g/cm³ (0.0975 lb/in³) |
| Melting Point | 1,080 – 1,205°F (582 – 588°C) |
| Conductivité thermique | 167 W/m·K |
| Coefficient of Thermal Expansion | 23.2 × 10⁻⁶ /K (20-100°C) |
| Conductivité électrique | 43% IACS |
| Poisson’s Ratio | 0.33 |
Physical properties of Aluminum 6061 alliage
T6 vs T651 Temper: Understanding the Difference
6061-T6 involves solution heat treatment followed by artificial aging. This temper delivers excellent strength and is the standard choice for most general applications.
6061-T651 undergoes the same heat treatment as T6 but includes an additional stress-relief stretching step (1% à 3% permanent set) after solution heat treatment. This process relieves internal stresses within the metal, mitigating warp and distortion during machining.
Key distinctions:
- T651 offers superior dimensional stability, making it the preferred choice for machining thin-walled or large components
- T651 exhibits lower residual stress compared to T6
- T6 is typically available in thicknesses under 0.25″, while T651 is common for plate stock and cold-finished bars
- Both tempers deliver nearly identical tensile and yield strength properties
Recommendation: Choose T651 when machining large, complex, or thin-walled parts where dimensional stability is critical. Choose T6 for general applications where standard strength and formability are sufficient.
Specifications & Normes
Our 6061-T6/T651 aluminum round bars are manufactured and tested in compliance with major international standards:
- ASTMB221 – Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes
- ASTM B211 – Standard Specification for Aluminum and Aluminum-Alloy Bar, Rod, and Wire
- MSA 4117 – Aluminum Alloy, Rolled or Cold Finished, Bars, Rods, and Wire
- QQ-A-200/8 – Aluminum Alloy 6061
- DANS 755 – Aluminum and Aluminum Alloys – Extruded Rod/Bar, Tube and Profiles
- GB/T 3191 – Aluminum and Aluminum-Alloy Extruded Bars
Other designations: UNS A96061, ISO AlMg1SiCu, AA6061
Size Range & Customization
| Parameter | Range |
|---|---|
| Diameter | 6.0 mm – 350 mm (0.25″ – 14″) |
| Longueur | 1,000 mm – 6,000 mm (custom lengths available) |
| Tolérance | Per ASTM B221 standards; tighter tolerances available upon request |
| Finition de surface | Mill finish, bright polished, rough turned, anodisé, coated |
Custom sizes and specifications available upon request.
Applications
6061 aluminum round bar is the most commonly used aluminum alloy in the world due to its positive characteristics. It is typically used in:
Aerospace
- Aircraft fittings and structural components
- Aircraft fasteners and connectors
- Landing gear components
- Reducing airframe weight
Automotive
- Engine parts and components
- Frames and chassis
- Brake pistons
- Suspension systems
- Enhancing vehicle performance and fuel efficiency
Marin
- Marine hardware and fittings
- Boat components and structures
- Above-average corrosion resistance in saltwater environments
General Manufacturing & Engineering
- Structural applications and frames
- Machine parts and components
- Hydraulic pistons and valves
- Couplings and connectors
- Épingles, brakes, and valve parts
Electrical & Électronique
- Electrical fittings and connectors
- Heat sinks and thermal management components
- Camera lens mounts
Construction & Architecture
- Building and curtain wall frames
- Decorative hardware and fittings
- Doors, les fenêtres, and structural framing
Why Choose Our 6061-T6/T651 Aluminum Round Bar?
Proven Quality
Manufactured to strict international standards (ASTM, MSA, DANS, GB/T) with full material traceability and mill test reports available upon request.
Wide Availability
Extensive inventory of diameters and lengths ensures fast delivery and reduced lead times.
Technical Expertise
Our experienced team provides professional selection guidance and application support to help you choose the right temper and specification for your project.
Custom Solutions
Flexible customization options for diameter, length, tolerance, and surface finish to meet your specific requirements.
Competitive Pricing
Direct manufacturing capabilities and efficient supply chain management deliver high-quality products at competitive prices.
Environmental Responsibility
Aluminum is infinitely recyclable, making it an environmentally friendly metal choice.
Get a Quote Today
Contact our sales team to discuss your 6061-T6/T651 aluminum round bar requirements. Whether you need standard sizes or custom specifications, we are ready to provide the high-quality aluminum products your projects demand.
All data and specifications are provided for reference purposes only and are not intended for design use. Please consult with our technical team for specific application requirements.
