Bar & rod

Aluminium Bar & Rod

Round, square, hexagonal and flat aluminium bar for machining, fasteners and structural parts. Metline Industries supplies extruded and cold-finished bar from Mumbai, from free-cutting grades for high-speed CNC work to high-strength aerospace alloys.

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Aluminium round, hex and square bars on a dark surface

Shapes: Round, square, hex, flat
Common alloys: 6061, 6082, 2011, 2024, 7075
Finish: Extruded or cold finished
Standards: ASTM B211, B221, EN 754, EN 755

Overview

Extruded or cold-finished bar

Most aluminium bar starts life as an extrusion. Extruded bar is cost-effective, available in a wide range of sizes and suitable for most machining and fabrication. Cold-finished bar is drawn through a die after extrusion, which tightens the diameter tolerance, improves straightness and leaves a cleaner surface, so it is preferred for automatic lathes and precision turned parts.

Choosing bar is about balancing machinability, strength and corrosion resistance against cost. A free-machining grade can double the output of a CNC lathe, while a high-strength 7075 bar lets you make a lighter part that still carries the load.

Grade selection

Choosing the bar alloy

Alloy	Family	What it is good at	Typical uses
2011	Al–Cu	Free-machining: small chips, fast cutting, excellent finish	Screw machine parts, fittings, fasteners
2014 / 2017	Al–Cu	High strength with good machinability	Forgings, aircraft fittings, heavy-duty parts
2024	Al–Cu	High strength and excellent fatigue resistance	Aerospace fittings, bolts, high-stress shafts
6061	Al–Mg–Si	Versatile, weldable, corrosion resistant, machines well	General machining, fixtures, valves, frames
6082	Al–Mg–Si	Higher-strength structural alternative to 6061	Structural parts, hydraulic components, machine parts
6063	Al–Mg–Si	Good finish and anodising response	Architectural and decorative bar
7075	Al–Zn	Among the strongest aluminium alloys	Aerospace, moulds, gears, high-load parts

Shapes

Bar shapes

Round bar and rod

For turned parts, shafts, pins and fasteners. Rod usually refers to smaller diameters.

Square bar

For milled blocks, keys and components with flat faces.

Hexagonal bar

For nuts, fittings and parts that need spanner flats without extra machining.

Flat bar

For brackets, busbars, frames and base plates.

Machining

Getting the best out of bar on the machine

Choose 2011 for maximum output on automatic lathes where strength demands are modest
Use 6061-T6 or 6082-T6 when parts need welding or good corrosion resistance
Specify T651 or T6511 stress-relieved tempers to reduce distortion on long or heavily machined parts
Select cold-finished bar when you need tight diameter tolerance straight off the bar
Ask for lead-free grades where RoHS or drinking-water rules apply

Catalogue

Bar and rod products

FAQ

Bar and rod questions

What is the easiest aluminium bar to machine?

2011 is the classic free-machining grade. It produces small, broken chips and a bright finish at high cutting speeds.

What is the difference between 6061 and 6082 bar?

Both are heat-treatable Al-Mg-Si alloys. 6082 is slightly stronger and is common in European specifications; 6061 is more widely used in American standards. Both weld and machine well.

Which aluminium bar is the strongest?

7075-T6 and 7075-T651 offer the highest strength among common bar grades, followed by 2024 and 2014.

What is cold-finished bar?

Extruded bar that has been drawn through a die to tighten tolerances, straighten it and improve the surface finish.

Can you cut bar to length?

Yes. Include the lengths and quantities you need in your enquiry.