6061 Aluminum Round Bar Stock
6061 Aluminum Round Bar Stock
6061 Aluminum Round Bar (UNS A96061) offers high strength, good corrosion resistance, and excellent machinability in T6 temper. Suitable for structural components, precision-machined parts, and industrial equipment, with custom diameters and cut lengths available.
- Mill Test Certificate Provided
- Strict Quality Inspection
- Custom Sizes Available
- On-Time Global Delivery
6061 Aluminum Round Bar, designated UNS A96061, is a heat-treatable aluminum-magnesium-silicon alloy known for its excellent machinability in the T6 condition, good strength-to-weight ratio, and corrosion resistance. It is widely used in precision-machined components, structural parts, transportation equipment, and industrial machinery where mechanical strength and dimensional accuracy are important.
Grade 6061 develops increased strength through solution heat treatment and artificial aging. The T6 temper provides good machining performance, while stress-relieved conditions such as T651, where applicable to the product form, help reduce residual stresses and improve dimensional stability during subsequent machining. However, welding may reduce strength in the heat-affected zone (HAZ), and prolonged exposure to aggressive marine environments requires careful material evaluation.
Sky Steel Group supplies 6061 aluminum round bars for machinery manufacturers, metal fabricators, and industrial distributors. ASTM B211/B211M applies to rolled or cold-finished bars, while ASTM B221 covers extruded bars. Available tempers, diameters, and lengths depend on the manufacturing process and supplier capabilities. Custom cutting, dimensional inspection, and material test certificates (MTC) can be arranged upon request, subject to order confirmation.
Key Features of 6061 Aluminum Round Bar
- High Strength-to-Weight Ratio: Provides good mechanical strength with relatively low density, making it suitable for structural components and weight-sensitive industrial applications.
- Excellent Machinability: Offers good chip formation and surface finish in the T6 condition, supporting CNC turning, milling, drilling, and precision machining.
- Good Corrosion Resistance: Resists corrosion in many atmospheric and general industrial environments, while aggressive marine conditions require additional protection or material evaluation.
- Heat-Treatable Alloy: Develops increased strength through solution heat treatment and artificial aging, with mechanical properties depending on the selected temper.
- Good Weldability: Supports TIG and MIG welding with appropriate filler materials and procedures, although welding may reduce strength in the heat-affected zone (HAZ).
- Flexible Supply Options: Available in supplier-confirmed diameters, lengths, and applicable tempers, including T6 and stress-relieved conditions where available, with custom cutting and material certification options upon request.
Technical Specifications of 6061 Aluminum Round Bar
| Parameter | Specification |
|---|---|
| Product Name | 6061 Aluminum Round Bar |
| Alloy Grade | 6061 |
| UNS Designation | A96061 |
| Material Type | Aluminum-Magnesium-Silicon Alloy (6xxx Series) |
| Aluminum Content | Balance |
| Magnesium Content | 0.8–1.2% |
| Silicon Content | 0.4–0.8% |
| Material Standards | ASTM B211/B211M / ASTM B221 (as applicable) |
| Common Tempers | T6, T651, T6511 (depending on product form) |
| Diameter | Custom sizes available |
| Length | Standard or custom cut lengths |
| Density | Approx. 2.70 g/cm³ |
| Tensile Strength | Approx. 310 MPa (typical T6 reference) |
| Yield Strength | Approx. 276 MPa (typical T6 reference) |
| Elongation | Approx. 8–17% (size and temper dependent) |
| Brinell Hardness | Approx. 95 HB (typical T6 reference) |
| Thermal Conductivity | Approx. 167 W/m·K (typical T6 reference) |
| Electrical Conductivity | Approx. 40–43% IACS (typical T6 reference) |
| Corrosion Resistance | Good in atmospheric and general industrial environments |
| Machinability | Good to Excellent in T6 Condition |
| Weldability | Good (TIG / MIG; HAZ strength reduction possible) |
| Surface Finish | Mill Finish / As Supplied |
| Processing Options | Cutting, CNC Turning, Milling, Drilling |
| Material Certification | MTC available upon request, subject to confirmation |
| Applications | Precision Machinery, Structural Components, Transportation Equipment, Industrial Tooling |
Properties shown are typical reference values, not guaranteed acceptance limits. Confirm mechanical properties, permitted tempers and tolerances against the applicable product standard and material certificate.
Applications of 6061 Aluminum Round Bar Stock
01. Aerospace & Aviation Components
6061 aluminum round bars are used to manufacture aircraft brackets, fittings, mounting hardware, and selected non-critical structural components. In T6 temper, the alloy provides a practical balance of strength, corrosion resistance, and machinability for lightweight aerospace parts.
02. Automotive & Transportation
6061 aluminum round bars are machined into suspension brackets, mounting components, spacers, and lightweight vehicle hardware. The T6 temper provides good mechanical strength at a lower weight than steel, making it useful for automotive components where weight reduction matters.
03. Industrial Machinery & Equipment
6061 aluminum round bars are used for machine spacers, shafts, fixtures, mounting blocks, and custom CNC-machined parts. T6 and suitable stress-relieved tempers offer good machinability, while residual stress should be considered when substantial material removal is required.
04. Construction & Architectural Applications
6061 aluminum round bars can be fabricated into railing connectors, handrail fittings, structural brackets, and architectural hardware. Their corrosion resistance suits many indoor and outdoor installations. For welded assemblies, the possible reduction in strength around the heat-affected zone should be considered.
Frequently Asked Questions About 6061 Aluminum Round Bar Stock
1. What is 6061 aluminum round bar?
6061 aluminum round bar is a heat-treatable aluminum-magnesium-silicon alloy, designated as UNS A96061. It offers a practical balance of mechanical strength, corrosion resistance, and machinability. Common uses include machine brackets, spacers, fixtures, shafts, and CNC-machined components. T6 is frequently specified where higher strength is needed.
2. What is the difference between 6061 and 7075 aluminum round bar?
7075-T6 has substantially higher tensile and yield strength than 6061-T6, making it suitable for heavily loaded machined parts. However, 6061 generally offers better weldability, corrosion resistance, and lower material costs. For welded assemblies and general industrial components, 6061 is often the more practical choice. Grade 7075 is typically selected when higher strength justifies the additional cost.
3. What ASTM standards apply to 6061 aluminum round bar?
ASTM B221/B221M covers extruded aluminum bars, while ASTM B211/B211M applies to rolled or cold-finished bars. The correct standard depends on the manufacturing process and product form. Buyers should confirm the required diameter, length, temper, and dimensional tolerances. Projects involving critical components may also require additional inspection records or material certifications.
4. What is the difference between 6061-T6, T651, and T6511?
All three tempers involve solution heat treatment and artificial aging. T651 and T6511 include additional stress relief by controlled stretching, which helps reduce residual stresses and machining distortion. T6511 also permits minor straightening after stretching. These designations apply to specific product forms and should not be treated as interchangeable. For extruded round bars, T6511 may be specified where supported by the applicable material standard.
5. Is 6061 aluminum round bar suitable for CNC machining?
Yes. 6061-T6 is commonly used for turned and milled components because it offers good machinability and predictable cutting performance. It can produce clean surfaces with suitable tools and cutting parameters. For parts requiring heavy material removal or tight tolerances, residual stress may cause dimensional changes, making temper selection and machining sequence important.
6. Can 6061 aluminum round bar be welded?
Yes. 6061 aluminum can be welded using TIG or MIG processes with suitable filler metals and welding procedures. However, welding softens the heat-affected zone (HAZ), reducing local strength in T6 material. Restoring the original T6 properties may require full solution heat treatment, quenching, and artificial aging, which can introduce distortion and may not be practical for finished assemblies.
7. Is 6061 aluminum round bar corrosion-resistant?
6061 aluminum provides good corrosion resistance in many atmospheric and general industrial environments. It is used for outdoor fittings, machinery components, and architectural hardware. However, prolonged chloride exposure, contact with dissimilar metals, and aggressive chemicals can increase corrosion risks. Anodizing or other protective finishes may be specified when additional surface protection is needed.
8. What information is required when ordering 6061 aluminum round bar?
For an accurate quotation, provide the diameter, cut length, quantity, temper, and applicable ASTM specification. Machining projects should also identify critical dimensional tolerances, straightness requirements, and inspection needs. Sky Steel Group can review requests for custom cutting, material test certificates (MTC), and export packaging before confirming supply details.
