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6061-T6 solid aluminum round bars arranged on wooden pallets

ENGINEERING BAR STOCK · CUT TO YOUR REQUIREMENTS

6061-T6 Aluminum Round Bar

A versatile heat-treated Al–Mg–Si aluminum bar for precision machining, structural parts, fixtures, shafts and transportation equipment.

Low density260 MPa minimum tensile referenceMachinableWeldableCut to length

Material

Aluminum alloy 6061

Magnesium and silicon provide heat-treatable strength; copper and chromium support the alloy response.

Temper

Solution heat-treated and artificially aged to develop the specified strength condition.

Product Routes

Extruded / cold finished

Select the route according to diameter tolerance, straightness, surface and machining needs.

Supply Form

Long bars / sawn blanks

Standard mill lengths or precision-cut pieces, subject to quotation and production feasibility.

Why Engineers Choose 6061-T6 Round Bar

Balanced Strength

Offers more structural strength than architectural 6063 while remaining easier to source and fabricate than many high-strength aerospace alloys.

Excellent Weight Reduction

Density is approximately 2.70 g/cm³, about one-third that of steel. This can reduce moving mass, transport weight and handling effort.

Production Versatility

Suitable for turning, milling, drilling, tapping, sawing and many welded assemblies. Round stock minimizes initial machining for cylindrical parts. For rectangular blanks, see 6061-T6 aluminum flat bar; compare 7075-T651 aluminum bar when higher strength is the primary selection criterion.

Corrosion Performance

Good resistance in normal atmospheric service. Anodizing or coating can improve appearance and environmental protection.

Detailed Chemical Composition

Nominal 6061 limits by mass. Chemistry must be verified against the purchase specification and mill test certificate for the delivered heat.

Element	Symbol	Minimum wt.%	Maximum wt.%	Function in 6061
Silicon	Si	0.40	0.80	Combines with magnesium to form the principal age-hardening phase.
Iron	Fe	—	0.70	Controlled impurity; excessive content can affect ductility and finish.
Copper	Cu	0.15	0.40	Contributes to strength and heat-treatment response.
Manganese	Mn	—	0.15	Controls microstructure within the alloy limit.
Magnesium	Mg	0.80	1.20	Primary strengthening addition together with silicon.
Chromium	Cr	0.04	0.35	Supports grain structure control and toughness behavior.
Zinc	Zn	—	0.25	Restricted residual element.
Titanium	Ti	—	0.15	May assist grain refinement during casting.
Other elements	Each / total	—	0.05 / 0.15	Controlled residuals.
Aluminum	Al	—	Balance	Base metal.

A dash means no separate minimum is specified in this summary. Always state the required standard and certificate type in the RFQ.

Mechanical Performance · T6 Reference

Mechanical properties change with product route, diameter or section thickness, sampling direction and governing specification. The minimum values below are useful extrusion references; contractual values come from the agreed standard.

Condition / section	Ultimate tensile strength	0.2% yield strength	Elongation
T6 extruded · section thickness ≤6.30 mm	260 MPa min.	240 MPa min.	8% min.
T6 extruded · section thickness >6.30 mm	260 MPa min.	240 MPa min.	10% min.

Typical tensile strength

≈310 MPa

Common handbook reference, not a guaranteed minimum.

Typical yield strength

≈276 MPa

Useful for preliminary material comparison.

Typical Brinell hardness

≈95 HB

Varies with product and test method.

Typical shear strength

≈207 MPa

Engineering reference, not an acceptance value.

Design note: Welding can reduce strength in the heat-affected zone. Rotating, fatigue-loaded, lifting, pressure-retaining and safety-critical parts require engineering validation and an appropriate inspection plan.

Physical and Thermal Parameters

Property	Reference value	Engineering relevance
Density	2.70 g/cm³ · 2,700 kg/m³	Mass and shipping-weight calculations
Elastic modulus	≈68.9 GPa	Elastic stiffness and preliminary deflection
Poisson’s ratio	≈0.33	Elastic analysis
Thermal conductivity · T6/T651	≈167 W/(m·K)	Heat spreading and thermal components
Specific heat capacity	≈896 J/(kg·K)	Transient thermal calculations
Coefficient of thermal expansion	≈23.6 µm/(m·K)	Allowance for temperature-related growth
Electrical conductivity · T6/T651	≈43% IACS	Conductive components and grounding comparisons
Melting range	≈582–652°C	Process and service-temperature context
Corrosion behavior	Good in normal atmosphere	Finish and maintenance planning

Values are representative, temperature dependent and intended for material selection. Use certified or specification-controlled values for final design.

Diameter, Area and Theoretical Weight

ØDsolid circular cross-section

Ordering expression: 6061-T6 + production route + ØD × length + quantity.

Cross-sectional area: A = πD² / 4

Theoretical mass: D² × 0.002121 kg/m, with D in millimetres.

Also define diameter tolerance, ovality, straightness, length tolerance, saw allowance, end squareness, burr condition, surface finish and inspection method.

Common Diameters and Theoretical Mass

These are common enquiry examples rather than a live-stock promise. Diameters, route, mill length, minimum order and cutting range are confirmed at quotation.

Diameter	Area	Approx. mass	Typical use
Ø6 mm	28.3 mm²	0.076 kg/m	Pins and miniature components
Ø8 mm	50.3 mm²	0.136 kg/m	Fasteners and instruments
Ø10 mm	78.5 mm²	0.212 kg/m	Bushings and spacers
Ø12 mm	113.1 mm²	0.305 kg/m	Small turned parts
Ø16 mm	201.1 mm²	0.543 kg/m	Fixtures and supports
Ø20 mm	314.2 mm²	0.848 kg/m	General machined components
Ø25 mm	490.9 mm²	1.325 kg/m	Shafts and couplings
Ø30 mm	706.9 mm²	1.909 kg/m	Machine components
Ø35 mm	962.1 mm²	2.598 kg/m	Rollers and hubs
Ø40 mm	1256.6 mm²	3.393 kg/m	Large turned parts
Ø50 mm	1963.5 mm²	5.301 kg/m	Structural and machined parts
Ø60 mm	2827.4 mm²	7.634 kg/m	Heavy components
Ø70 mm	3848.5 mm²	10.391 kg/m	Large tooling blanks
Ø80 mm	5026.5 mm²	13.572 kg/m	Large shafts and blanks
Ø100 mm	7854.0 mm²	21.206 kg/m	Heavy-duty blanks
Ø120 mm	11309.7 mm²	30.536 kg/m	Oversize machining stock
Ø150 mm	17671.5 mm²	47.721 kg/m	Large custom components
Ø200 mm	31415.9 mm²	84.823 kg/m	Large-diameter enquiry

Actual weight depends on measured diameter, tolerance and density. Typical bar lengths are 1–6 m; other lengths and sawn blanks may be available.

How 6061-T6 Compares with Other Materials

Material	Relative strengths	Trade-offs / when another material may be better
6061-T6 aluminum	Balanced strength, good corrosion resistance, weldability, machinability and broad availability.	Lower strength and fatigue capability than 7075; lower stiffness and wear resistance than steel.
6063-T5/T6 aluminum	Usually better cosmetic extrusion finish, very good anodizing response and formability.	Generally lower strength; choose 6061 when structural or machined performance is more important.
7075-T6/T651 aluminum	Much higher strength and excellent strength-to-weight performance.	Higher cost, lower general corrosion resistance and poor conventional fusion weldability; often unnecessary for general fixtures.
5052-H32 aluminum	Excellent sheet-forming and marine corrosion performance; good weldability.	Commonly supplied as sheet/plate rather than general machining bar and has lower heat-treated strength.
304 stainless steel	Higher stiffness, good wear behavior and excellent general corrosion resistance.	About three times the density, usually harder to machine and may increase shipping and moving mass.
Carbon steel	High stiffness, wear resistance, low raw-material cost and wide availability.	Much heavier and normally needs corrosion protection; total lifecycle cost depends on coating and maintenance.
Brass	Excellent machinability in suitable grades, decorative color and useful bearing characteristics.	Significantly heavier and often costlier; alloy choice must consider lead and regulatory requirements.

This table is a qualitative selection guide. Compare certified properties, environment, joining, fatigue, cost and applicable codes before substitution.

Typical Uses

CNC Machining

Spacers, standoffs, threaded parts, housings, collars, adapters and turned components.

Automation & Machinery

Fixture components, rollers, shafts, supports, jigs, guards and equipment hardware.

Transport & Marine

Lightweight brackets, mounts, fittings and noncritical structural components where appropriate.

Electrical & Thermal

Bus-support hardware, heat-spreading parts, electronic structures and equipment frames.

Construction & Architecture

Connectors, decorative details, rail components and fabricated assemblies.

Consumer & Sporting Goods

Handles, hubs, supports and precision parts where low weight and appearance matter.

Processing Services We Can Quote

↔

Cut to Length

Mill lengths, batch sawing and individual blanks. State tolerance, squareness, burr and machining allowance.

◎

CNC Turning & Milling

Rough or finished machining from buyer drawings, including holes, threads, shoulders, grooves and flats.

⌁

Drilling & Tapping

Hole patterns and threads with agreed datum, positional tolerance, depth and inspection requirements.

◫

Surface Finishing

Polishing, brushing, anodizing and coating options subject to dimensions, end use and appearance standard.

⌁

Deburring & End Preparation

Edge break, chamfer, cleaned saw cuts and part identification can be discussed.

▧

Drawing-Based Supply

Upload a drawing with dimensions, tolerances, finish, inspection and packing notes for manufacturability review.

Processing capability, tolerances, minimum order and inspection method are confirmed during technical review.

Quality Assurance and Traceability

1 · RFQ Review

Standard, route, size and end use

2 · Material Control

Alloy, temper and heat traceability

3 · Dimensional Check

Diameter, length and straightness

4 · Surface & Quantity

Visual condition and count

5 · Documents

Certificate and inspection records as agreed

Inspection item	Available control / document
Material identity	Purchase specification, alloy and temper verification
Chemical composition	Mill test certificate / certificate of analysis when specified
Mechanical properties	Certificate values or agreed testing requirements
Dimensions	Diameter, ovality, length, straightness and cut-end checks to agreed tolerances
Surface	Mill finish or agreed cosmetic acceptance standard
Traceability	Heat/lot relationship and part marking subject to order requirements
Third-party inspection	Can be coordinated when agreed before order placement

Packaging and International Transportation

Surface Protection

Paper, film, foam or separators may be used according to surface requirements and transport risk.

Secure Bundling

Strapped bundles, supported lengths and protected ends help limit movement and handling damage.

Export Packing

Wooden pallets, cases or reinforced bundles can be quoted according to size, weight and route.

Shipping Support

FOB, CIF and other agreed Incoterms; sea, air or express options depend on dimensions and urgency.

Bundles of solid 6061-T6 aluminum round bar prepared in an industrial warehouse

AI-generated product presentation image. It does not certify the exact batch, diameter, surface condition or final packing.

Ordering Checklist

Please Include

• Alloy and temper: 6061-T6
• Extruded or cold finished route
• Diameter × length
• Quantity or total weight
• Governing standard and edition
• Diameter, length and straightness tolerances
• End condition and machining allowance
• Surface finish and cosmetic requirements
• Inspection and certificate requirements
• Packing method and destination port

Common Standards to Discuss

ASTM B221 — extruded bars, rods and profiles.
ASTM B211 — rolled or cold-finished bar, rod and wire.
EN 755 / EN 754 — European extrusion or cold-drawn product families where applicable.

The buyer’s specified standard, dimensional range and edition control the order. Equivalent standards are not automatically interchangeable.

Send Us Your Drawing or Size List

We can review material route, cutting, machining, inspection, packing and delivery as one quotation. Availability, minimum order quantity, processing scope, price and lead time are confirmed for each enquiry.

Technical reference basis: Kaiser Aluminum 6061 Rod & Bar and Hydro 6061 extrusion data. This page supports enquiry and material comparison; the purchase order, agreed drawing, governing specification and certificate define contractual acceptance.

PRODUCT CATALOG

Aluminum Bars

6061-T6 Aluminum Flat Bar

6061-T6 Aluminum Round Bar

7075-T651 Aerospace Aluminum Bar