Speeds
Aluminium allows very high surface speeds with carbide; rigidity, clamping and chip evacuation are usually the limits.
Round rod for shafts and turned parts
6082 Aluminium Round Bar & Rod
6082-T6 round bar is the standard aluminium rod for turned parts, shafts, pins and structural fittings wherever drawings follow European or Indian standards. It combines the highest strength of the common 6xxx alloys with good machining and corrosion resistance. Metline supplies 6082 rod from about 6 to 300 mm diameter, extruded, drawn, peeled or ground, cut to length and certified to EN 755-2, worldwide.
- Alloy
- EN AW-6082 (AlSi1MgMn)
- Tempers
- T6, T6511, T4, O
- Diameter
- about 6 – 300 mm
- Standards
- EN 755-2 · EN 755-3 · EN 754-2
What 6082 round bar is used for
A turned component is only as good as the rod it starts from. For 6082 round bar the things that decide cost and quality are the diameter tolerance (how much stock you must remove), straightness (whether the bar runs true in a bar feeder), internal stress (whether a bored part stays round) and the strength that is actually reached at the bar centre.
6082-T6 performs well on all of these. It reaches a minimum tensile strength of 310 MPa and proof stress of 260 MPa between 20 and 150 mm diameter under EN 755-2, it machines with short broken chips in T6, and stretched T6511 bar keeps residual stress low for parts that are heavily bored or slotted.
Round bar is the most common 6082 product after profiles. Typical parts include shafts and rollers for conveyors and packaging machines, hydraulic and pneumatic components, couplings, pulleys, pins and bolts, and machined structural nodes for trusses and towers.
6082 composition (wt %)
Limits per EN 573-3. The manganese addition is what gives 6082 its fine grain and higher strength than 6061 in most sizes.
| Element | Minimum | Maximum |
|---|---|---|
| Silicon (Si) | 0.70 | 1.30 |
| Magnesium (Mg) | 0.60 | 1.20 |
| Manganese (Mn) | 0.40 | 1.00 |
| Iron (Fe) | — | 0.50 |
| Chromium (Cr) | — | 0.25 |
| Zinc (Zn) | — | 0.20 |
| Copper (Cu) | — | 0.10 |
| Titanium (Ti) | — | 0.10 |
| Others, each / total | — | 0.05 / 0.15 |
| Aluminium (Al) | Remainder |
Mechanical properties of 6082 round bar
| Temper and size (EN 755-2, extruded bar) | Tensile Rm min. | Proof Rp0.2 min. | Elongation A min. |
|---|---|---|---|
| O / H111, ≤ 200 mm | 160 MPa max. | 110 MPa max. | 14 % |
| T4, ≤ 200 mm | 205 MPa | 110 MPa | 14 % |
| T6, ≤ 20 mm | 295 MPa | 250 MPa | 8 % |
| T6, over 20 to 150 mm | 310 MPa | 260 MPa | 8 % |
| T6, over 150 to 200 mm | 280 MPa | 240 MPa | 6 % |
| T6, over 200 to 250 mm | 270 MPa | 200 MPa | 6 % |
For round bar the size band is the diameter. Typical T6 rod of 20 – 100 mm usually tests at about 320 – 340 MPa tensile and 280 – 310 MPa proof stress, with hardness around 90 – 100 HB. Above 150 mm, slower cooling of the core lowers the guaranteed values, so ask for certified results at your diameter.
Physical properties of 6082-T6 (typical)
- Density
- 2.70 g/cm³ (0.098 lb/in³)
- Modulus of elasticity
- about 70 GPa
- Thermal conductivity
- about 170 – 180 W/m·K
- Electrical conductivity
- about 40 – 45 % IACS
- Coefficient of thermal expansion
- about 23.1 µm/m·°C (20 – 100 °C)
- Melting range
- about 555 – 650 °C
- Brinell hardness
- about 90 – 100 HB
Extruded, drawn, peeled or ground 6082 rod
| Route | Typical diameters | Tolerance | Surface | Best for |
|---|---|---|---|---|
| Extruded T6 / T6511 | about 10 – 300 mm | EN 755-3 | Mill finish, may show light die lines | Parts machined all over |
| Cold-drawn T6 | about 6 – 80 mm | EN 754-3 (closer) | Bright, smooth | Small turned parts, bar-fed lathes |
| Peeled / turned | about 30 – 300 mm | Closer than extruded, set by turning | Turned, extrusion skin removed | Large bar where skin defects must go |
| Centreless ground | about 6 – 100 mm | ISO fit class such as h9 or h8, by agreement | Ground, very straight | Shafts, guide rods, piston rods |
Extruded tolerances widen as diameter increases, and ovality is limited to the same band. If the bar's outside diameter becomes a finished surface or a fit, specify drawn, peeled or ground bar with the fit class on the order. For bar feeders, also state straightness, for example in millimetres per metre, as extruded straightness can be too loose for high-speed feeding.
6082 round bar sizes and weights
Weight per metre = 0.002121 × d² kg (d in mm, density 2.70 g/cm³). Theoretical values; for other sizes use the bar weight calculator.
| Diameter (mm) | Approx. inch | kg per metre | kg per 3 m bar | lb per foot |
|---|---|---|---|---|
| 6 | 0.24 | 0.076 | 0.23 | 0.051 |
| 8 | 0.31 | 0.136 | 0.41 | 0.091 |
| 10 | 0.39 | 0.212 | 0.64 | 0.142 |
| 12 | 0.47 | 0.305 | 0.92 | 0.205 |
| 16 | 0.63 | 0.543 | 1.63 | 0.365 |
| 20 | 0.79 | 0.848 | 2.54 | 0.570 |
| 25 | 0.98 | 1.33 | 3.98 | 0.891 |
| 30 | 1.18 | 1.91 | 5.73 | 1.282 |
| 35 | 1.38 | 2.60 | 7.79 | 1.746 |
| 40 | 1.57 | 3.39 | 10.18 | 2.280 |
| 45 | 1.77 | 4.29 | 12.88 | 2.886 |
| 50 | 1.97 | 5.30 | 15.90 | 3.562 |
| 55 | 2.17 | 6.41 | 19.24 | 4.311 |
| 60 | 2.36 | 7.63 | 22.90 | 5.130 |
| 65 | 2.56 | 8.96 | 26.88 | 6.020 |
| 70 | 2.76 | 10.39 | 31.17 | 6.982 |
| 75 | 2.95 | 11.93 | 35.78 | 8.015 |
| 80 | 3.15 | 13.57 | 40.72 | 9.120 |
| 90 | 3.54 | 17.18 | 51.53 | 11.542 |
| 100 | 3.94 | 21.21 | 63.62 | 14.250 |
| 110 | 4.33 | 25.66 | 76.98 | 17.242 |
| 120 | 4.72 | 30.54 | 91.61 | 20.519 |
| 130 | 5.12 | 35.84 | 107.5 | 24.082 |
| 140 | 5.51 | 41.56 | 124.7 | 27.929 |
| 150 | 5.91 | 47.71 | 143.1 | 32.062 |
| 160 | 6.30 | 54.29 | 162.9 | 36.479 |
| 180 | 7.09 | 68.71 | 206.1 | 46.169 |
| 200 | 7.87 | 84.82 | 254.5 | 56.999 |
| 220 | 8.66 | 102.64 | 307.9 | 68.968 |
| 250 | 9.84 | 132.54 | 397.6 | 89.060 |
| 280 | 11.02 | 166.25 | 498.8 | 111.717 |
| 300 | 11.81 | 190.85 | 572.6 | 128.247 |
Inch diameters, where 6082 is ordered against imperial drawings:
| Diameter (in) | Diameter (mm) | lb per foot | kg per metre |
|---|---|---|---|
| 1/4 | 6.35 | 0.057 | 0.086 |
| 3/8 | 9.52 | 0.129 | 0.192 |
| 1/2 | 12.70 | 0.230 | 0.342 |
| 5/8 | 15.88 | 0.359 | 0.534 |
| 3/4 | 19.05 | 0.517 | 0.770 |
| 7/8 | 22.22 | 0.704 | 1.05 |
| 1 | 25.40 | 0.919 | 1.37 |
| 1-1/4 | 31.75 | 1.436 | 2.14 |
| 1-1/2 | 38.10 | 2.068 | 3.08 |
| 1-3/4 | 44.45 | 2.815 | 4.19 |
| 2 | 50.80 | 3.677 | 5.47 |
| 2-1/2 | 63.50 | 5.746 | 8.55 |
| 3 | 76.20 | 8.274 | 12.31 |
| 3-1/2 | 88.90 | 11.262 | 16.76 |
| 4 | 101.60 | 14.709 | 21.89 |
| 5 | 127.00 | 22.983 | 34.20 |
| 6 | 152.40 | 33.096 | 49.25 |
| 7 | 177.80 | 45.047 | 67.04 |
| 8 | 203.20 | 58.837 | 87.56 |
Lengths and processing
- Standard lengths
- 3 m to about 6 m; fixed lengths on request
- Cut pieces
- Saw-cut blanks and discs, deburred, to your sizes
- Marking and packing
- End-marked with alloy, temper and lot; bundled, capped or boxed; export cased
Inspection and certification
Each lot is checked for diameter and ovality at several points, straightness, length and surface condition before dispatch. Ultrasonic testing to EN 12680-2 or ASTM B594 can be arranged for large-diameter bar used in critical parts.
The EN 10204 3.1 certificate shows the chemical analysis and tensile test results (Rm, Rp0.2, A) against EN 755-2, plus the heat or lot number marked on the bar. Third-party inspection can be arranged at your cost.
- Diameter, ovality and straightness to EN 755-3, EN 754-3 or your drawing
- Chemistry and tensile results on the 3.1 certificate
- Hardness or conductivity check to confirm temper on request
- Ultrasonic inspection for large bar by agreement
Turning and machining 6082 rod
Tooling
Sharp, polished, high-positive-rake inserts reduce built-up edge. Uncoated or DLC-coated carbide works well.
Chips
T6 forms short curled chips. O and T4 are gummy and produce long chips; avoid them for heavy machining.
Distortion
Use T6511 for long, slender or deeply bored parts. Rough, then finish after the part has relaxed.
Threads
Thread rolling and form tapping give strong threads in T6. Use inserts for threads that will be reassembled often.
Finishing
Anodise after machining for protection; hard anodising adds wear resistance on shafts. Allow for film growth on fits.
Standards and equivalents for 6082 rod
| System | Designation | Standard for bar and rod |
|---|---|---|
| European | EN AW-6082 (AlSi1MgMn) | EN 755-2 (extruded properties), EN 754-2 (drawn), EN 755-3 / -4 / -5 / -6 (tolerances by shape) |
| UNS | A96082 | — |
| Germany | Werkstoff 3.2315 (AlMgSi1) | DIN EN 755 / 754 |
| United Kingdom (old) | HE30 / H30 | BS 1474 (withdrawn, replaced by EN 755) |
| ISO | AlSi1MgMn | ISO 6362 series |
| India | 64430 | IS 733 |
| USA | 6082 (registered alloy) | Ordered to EN 755-2 or to ASTM B221 where the edition lists it; state agreed minimums |
Applications of 6082 round bar
- Machinery: conveyor rollers and shafts, packaging and printing machine parts, pulleys and couplings
- Fluid power: cylinder end caps, pistons, valve bodies and fittings
- Structures: truss connectors, scaffold spigots, pins and machined nodes
- Transport: machined fittings for rail, truck, trailer and bus bodies
- Marine: deck hardware, stanchion bases and fittings (anodised)
- Forging stock: rod cut to slugs for closed-die forgings such as suspension arms
6082 round bar versus alternatives
| Option | When it is the better choice |
|---|---|
| 6061-T6 round bar | Drawings to ASTM or AMS standards, or where a brighter anodised finish is wanted |
| 2011 or 6262 free-machining rod | High-volume automatic lathe work where cycle time dominates |
| 7075-T6 rod | Highly loaded shafts and pins needing much higher strength, without welding |
| 6063 rod | Decorative parts where finish matters more than strength |
| 5083 round bar | Welded parts in constant seawater exposure |
For a side-by-side discussion of the two most common choices, see 6061 vs 6082.
How to order 6082 round bar
- SpecifyAlloy and temper (for example 6082-T6511 round, 80 mm), shape and size, length or cut pieces, quantity, and the governing standard (EN 755-2 with EN 755-3 tolerances).
- QuoteWe confirm availability, tolerance class, certification and delivery terms (EXW, FOB, CIF or DAP) for your destination.
- ProcessBars are cut to length or to blanks on request, end-marked with alloy, temper and lot number, and inspected for size, straightness and surface.
- DocumentEach shipment carries a mill test certificate to EN 10204 3.1 with chemistry and tensile results, plus the packing list; third-party inspection on request.
- ShipBundles are wrapped and packed in seaworthy wooden cases or on pallets and sent by sea or air to your port or door.
References and standards
- EN 755-2 – Extruded rod/bar, tube and profiles: mechanical properties
- EN 755-3 – Extruded round bars: tolerances on dimensions and form
- EN 754-2 – Cold drawn rod/bar and tube: mechanical properties
- EN 10204 – Metallic products: types of inspection documents
- The Aluminum Association – Aluminum Standards and Data
6082 aluminium (aluminum) round bar: frequently asked questions
What is the strength of 6082-T6 round bar?
Under EN 755-2, extruded 6082-T6 round bar from 20 to 150 mm diameter has a minimum tensile strength of 310 MPa, proof stress of 260 MPa and elongation of 8 %. Bars up to 20 mm have 295 / 250 MPa, and bars over 150 mm have lower minimums.
How much does 6082 round bar weigh?
About 0.002121 × d² kg per metre with d in mm. A 25 mm bar is about 1.33 kg/m, a 50 mm bar 5.30 kg/m and a 100 mm bar 21.2 kg/m.
Is 6082 round bar good for shafts?
Yes, for light and medium-duty shafts, rollers and guide rods. Order ground bar for a fit class and good straightness, and consider hard anodising for wear surfaces. Heavily loaded shafts may need 7075 or steel.
What is the difference between 6082-T6 and T6511 round bar?
Both have the same minimum properties. T6511 bar is stretched after quenching to relieve residual stress, so it stays straighter and rounder when bored or slotted.
Can you supply 6082 round bar over 300 mm diameter?
Larger diameters are normally produced as forged or cast-and-turned bar rather than extrusions. Send your diameter, length and property requirements and we will confirm what can be supplied.
Can 6082 rod be welded?
Yes, by MIG or TIG with ER5356 or ER4043 filler. The heat-affected zone loses a large part of its T6 strength, which must be allowed for in design.
Need 6082 round bar?
Send diameter, route, temper, length and quantity. We will reply with availability, certification and a delivered price.
