When a machined bracket depends on a 6082 bar that was actually shipped in T5 instead of T6, or a diameter that runs 0.3 mm over and never cleans up in one turning pass, the whole batch becomes scrap - and you find out at the CNC, not at incoming inspection.
What is 6082 Aluminum Round Bar
6082 is a 6xxx-series Al-Mg-Si alloy with manganese added to lift strength above 6061, and in round-bar form it is a solid cylindrical section produced by extrusion or cold drawing. It is the European-mainstream structural alloy: in T6/T6511 it carries higher yield than 6061 while keeping good weldability and corrosion resistance, which is why it shows up in bridges, crane booms, rail bodies, and machined fixtures. We supply it as-cut round bar in diameters typically from 6 to 500 mm, in lengths of 1–6 m or cut-to-length, and as mill finish or with anodizing / coating on request. Choose 6082 round bar when the part is load-bearing and must weld or machine cleanly.
Chemical Composition (AA 6082)
| Element | Min % | Max % | Role / Function |
|---|---|---|---|
| Silicon (Si) | 0.70 | 1.30 | Forms Mg₂Si with Mg; drives precipitation hardening in T6. |
| Iron (Fe) | - | 0.50 | Minor constituent; controlled to protect surface and anodizing. |
| Copper (Cu) | - | 0.10 | Kept very low to preserve weldability and corrosion resistance. |
| Manganese (Mn) | 0.40 | 1.00 | Grain refiner; the element that gives 6082 its edge over 6061. |
| Magnesium (Mg) | 0.60 | 1.20 | Primary strengthening element via Mg₂Si. |
| Chromium (Cr) | - | 0.25 | Controls recrystallization and grain structure. |
| Zinc (Zn) | - | 0.20 | Limited to avoid stress-corrosion sensitivity. |
| Titanium (Ti) | - | 0.10 | Grain refiner. |
| Others each / total | - | 0.05 / 0.15 | Residual control per AA 6082. |
| Aluminum (Al) | Remainder | Remainder | Base metal. |
Composition per ASTM B221 / EN 573-3 for AA 6082 (EN AW-6082, AlSi1MgMn).
Mechanical Properties
| Temper | UTS MPa | Yield MPa | Elong % | Hardness |
|---|---|---|---|---|
| T6 (main) | 310–340 | 270–280 | 8–12 | ~95 HB |
| T6511 (stress-relieved) | 295–330 | 260–290 | 8 | ~95 HB |
| T5 | 260–310 | 230–260 | 8–10 | ~90 HB |
| T4 | 205–260 | 110–170 | 14–16 | ~65 HB |
| O (annealed) | 130–180 | 55–90 | 18–22 | ~40 HB |
Typical reference values; actual tensile by diameter and standard shown on the MTC. T6/T6511 are the structural supply tempers.
Physical & Thermal Properties
| Property | Value | Imperial |
|---|---|---|
| Density | 2.70 g/cm³ | 0.0975 lb/in³ |
| Melting range (solidus–liquidus) | ≈ 555–650 °C | ≈ 1031–1202 °F |
| Elastic modulus | 70 GPa | 10.2 × 10⁶ psi |
| Thermal conductivity | 170–180 W/m·K | 980–1040 BTU·in/ft²·h·°F |
| Electrical conductivity | ≈ 40–42 % IACS | - |
| Coefficient of thermal expansion | 23.4 µm/m·°C | 13.0 µin/in·°F |
| Max continuous service temp | ≈ 170 °C | ≈ 338 °F |
6082 Aluminum Round Bar Specifications Table
| Item | Specification |
|---|---|
| Alloy | 6082 (AA 6082 / EN AW-6082) |
| Temper | T6 / T6511 (main); T5, T4, O on request |
| Shape | Round bar (square / hex available) |
| Diameter range | Ø 6–500 mm (larger on request) |
| Length | 1–6 m standard; cut-to-length / multiples on request |
| Manufacturing | Extruded (ASTM B221) or cold-drawn (ASTM B211) |
| Standards | ASTM B221, ASTM B211, EN 755, AMS 4117 (T6) |
| Surface | Mill finish; anodized / powder-coated on request |
| Tolerance | Per ASTM B221/B211 or confirmed drawing |
| MOQ | Flexible; small trial orders negotiable |
| Lead time | 15–30 days |
| Packaging | Seaworthy: bundle, interleaved paper, wooden case / pallet |
Heat Treatment & Temper Guide
6082 is heat-treatable, so temper is set by thermal process, not by cold work. The route for the structural tempers we supply is:
| Temper | Process |
|---|---|
| T6 | Solution heat treat 530±5 °C, quench, artificial age 175±5 °C × 8 h. Highest standard strength. |
| T6511 | T6 plus 1–3 % stretch for stress relief; best dimensional stability on long or machined parts. |
| T5 | Extrude, air-cool, then artificial age - no separate solution step; slightly lower strength, lower cost. |
| T4 | Solution heat treat + natural age; moderate strength, good formability. |
| O | Full anneal (~340–410 °C, furnace cool); soft, for forming or post-form heat-treat. |
Because 6xxx strength comes from ageing, the delivered temper must actually reach T6 - hardness plus tensile on the MTC is what separates T5 from T6.
Equivalent Designations
| System | Designation |
|---|---|
| AA | 6082 |
| UNS | A96082 |
| EN | EN AW-6082 (AlSi1MgMn) |
| DIN | 3.2315 (Werkstoff) |
| ISO | Al Si1MgMn |
| JIS | A6N01 (closest) |
Corrosion Resistance
Atmospheric: Good. A stable oxide film gives reliable performance in rural, urban, and industrial air with little maintenance.
Marine: Good general resistance; better than 7075 but below 5083 in aggressive seawater. For immersion or splash zones, add anodizing or cladding.
Galvanic: Like all aluminum, 6082 corrodes preferentially when coupled to less noble metals (carbon steel, copper) in an electrolyte - isolate with dielectric washers or coat the junction.
Stress-corrosion cracking (SCC): Low risk in 6xxx alloys and in T6/T6511; keep sustained tensile stress and aggressive chloride together only with proper design and temper control.
After finishing: Mill finish is fine indoors; anodizing or powder coating extends service life outdoors and in coastal sites.
Fabrication
Welding: 6082 round bar welds well by TIG and MIG. Use ER4043 for general fabrication and ER5356 where the joint needs higher strength or marine service. Expect the heat-affected zone to soften by roughly 30 % versus the base temper - design the joint, not the parent, as the limiting section. Machining: T6 and T6511 machine cleanly with good chip control and surface finish; O temper is soft and gummy, so use sharp tooling and positive rake. Formability: Best in O or T4; T6 needs larger bend radii and is not for severe cold forming. For formed-then-heat-treated parts, form in O/T4 and age to T6 after.
Surface Finishes
| Finish | Notes |
|---|---|
| Mill finish | As-extruded / as-drawn; standard for machining and welding stock. |
| Anodized | Clear or colored oxide; wear and corrosion protection, decorative. |
| Powder coated | Polyester or epoxy; architectural and outdoor color. |
| Brushed / polished | Directional or mirror finish for decorative parts. |
Applications
Bridges & infrastructure: Deck members, guardrails, structural connectors - T6 yield ~270–280 MPa carries the load.
Cranes & lifting: Jib, boom, and mast sections where strength-to-weight matters on every lift.
Rail: Body framing, couplers, bogie components - EN 755 mainstream alloy with good weldability.
Marine (classed): Class-certified marine structures and deck equipment when supplied with DNV/ABS certification.
Heavy machinery & shafts: Machine frames, spindles, and stressed parts; T6511 limits distortion on long bars.
Transport: Truck chassis and heavy-transport structures specified to EN 755 sections.
Machined fixtures & tooling bases: T6511 gives stable, predictable stock for CNC machining.
General structural fabrication: Welded frames, gussets, and brackets where 6061 would be marginal on strength.
6082 vs Other Aluminum Alloys
| Alloy (temper) | UTS MPa | Yield MPa | Elong % | Density g/cm³ | Cond % IACS | Why choose it |
|---|---|---|---|---|---|---|
| 6082-T6 | 310–340 | 270–280 | 8–12 | 2.70 | 42 | Top 6000-series strength + weldability; structural European mainstay. |
| 6061-T6 | 310–330 | 276 | 12 | 2.70 | 43 | Very similar; 6082 edges it on yield via Mn. |
| 7075-T6 | 540–570 | 480–505 | 11 | 2.81 | 33 | Much stronger but poor weldability; use where welding is absent. |
| 5083-O | 275–350 | 110–145 | 16–22 | 2.66 | 29 | Best marine corrosion; choose for seawater immersion. |
| 6063-T6 | 241–260 | 214 | 12 | 2.70 | 53 | Architectural; better anodizing, lower strength. |
Comparison values are typical; verify against the applicable standard before design sign-off.
Quality Control & Inspection
Risk we control: The failure that reaches your floor is grade mix-up (6061 sold as 6082) or a bar that never reached T6 - both look identical until the part is machined or loaded. Our checks target exactly those.
Actions & standards:
Dimensions: Diameter, ovality, straightness, length, and end squareness are checked per piece against ASTM B221/B211 or your drawing - so the bar cleans up in one pass and seats in the fixture.
Grade verification (PMI): A handheld XRF reads Si, Mg, Mn and the other elements on the piece and matches them to the MTC heat analysis, so 6082 is never confused with 6061.
Temper confirmation: Tensile per ASTM B557 plus Brinell hardness per ASTM E10 confirm the bar actually reached T6/T6511 - the check that separates T5 from T6.
Surface & document: Surface is inspected for seams, laps, and end burr; each lot ships with an EN 10204 3.1 MTC covering chemistry, tensile, and dimensions.
Result: You receive grade-, temper-, and dimension-verified bar with paper that matches the metal.
Delivery & Order Process
After you send the diameter, temper, length, and standard, we issue a quote that lists alloy, temper, tolerances, packaging, and the 15–30 day lead time. Before production we confirm the sign-off node: you approve the written specification and any sample/PPAP, so there is no ambiguity about diameter, temper, and end condition. If any bar fails incoming inspection - wrong grade, sub-T6 temper, out-of-tolerance, or surface defect - we quarantine that lot and ship a replacement from a verified heat; we do not mix suspect material into your order. Send your drawing for spec sign-off and we schedule production.
Why Choose GNEE
Documented, traceable material: Every 6082 bar ships with an EN 10204 3.1 MTC covering chemistry, tensile, and dimensions - the paper your QA and end customer require.
Real grade and temper control: XRF grade check and tensile-plus-hardness temper confirmation mean the bar you ordered is the bar you get, not a look-alike.
Custom sizes and tempers: Diameters 6–500 mm, lengths 1–6 m or cut-to-length, and T6 / T6511 / T5 / T4 / O on request - matched to your drawing.
Predictable lead time: 15–30 days with a confirmed sign-off before production, so you can plan the line instead of chasing the supplier.
Export-ready packaging: Bundled, interleaved, and seaworthy-cased for ocean freight to more than 100 countries.
FAQ
Q1: What is the difference between 6082-T5 and 6082-T6 round bar?
A: T6 is solution heat-treated then artificially aged, giving ~270–280 MPa yield versus ~230–260 MPa in T5. Choose T6 for structural load; T5 suits lightly stressed parts at lower cost.
Q2: Can you supply exact diameters and cut lengths?
A: Yes. We cut to length (1–6 m standard, shorter on request) and supply extruded or cold-drawn forms. State finished diameter, temper, and length and we confirm tolerance.
Q3: Which standard applies?
A: Supplied to EN 755 / ASTM B221 (extruded) or ASTM B211 (cold-drawn). If your project calls for a specific ASTM / EN / AMS, state it and we confirm.
Q4: Do you provide MTC and third-party inspection?
A: Yes - EN 10204 3.1 MTC as standard, and third-party inspection (e.g. SGS) can be arranged before shipment.
Q5: Is 6082-T6 weldable, and does welding weaken it?
A: Yes, with ER4043 or ER5356. The weld HAZ softens by ~30 % versus the base temper, so design the joint as the limiting section rather than the parent bar.
Request a Quote for 6082 Aluminum Round Bar
Send us your diameter, temper, length, and standard, and we will return a firm quote with MTC, packaging, and a 15–30 day lead time.
Hot Tags: 6082 aluminum round bar, China 6082 aluminum round bar manufacturers, suppliers, factory
