Extruded Aluminium Angle Profile 20 to 100 mm 6061 T6 Equal Leg

OEM / ODM Available Free Sample Available Mill certificate to EN 10204 3.1 on request, RoHS and REACH declarations

Extruded aluminium equal leg angle from 20 x 20 x 3 mm to 100 x 100 x 15 mm in 6061-T6. One controlled root radius, uniform wall to ±0.15 mm, no slot, cut to any length.

Wholesale Price Quoted against size, wall, finish and quantity per per metre or per piece

Material	Aluminium
Alloy Grade	6061-T6
Temper	T6
Section Size	20 x 20 x 3 mm to 100 x 100 x 15 mm equal leg angle
Slot	Not applicable, this is a solid extruded angle with no slot
Length	Saw cut to length, ends square or 45 degree mitre, +/-0.5 mm
Tolerance	EN 755-9 and GB/T 6892, wall +/-0.15 mm
Surface	Mill finish / clear anodised / black anodised / powder coated
MOQ	Made to order; standard sizes from stock
Lead Time	Typically 1 to 2 weeks for cutting and drilling, plus a week for anodising
Loading Port	Shanghai, Ningbo, Qingdao, Shenzhen
Supply Ability	In-house extrusion, saw cutting, drilling and surface finishing
Payment Terms	T/T 30 per cent deposit, balance against copy of bill of lading
Trade Terms	FOB, CIF, CFR, EXW
Certifications	Mill certificate to EN 10204 3.1 on request, RoHS and REACH declarations

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An extruded equal leg angle: one true 90 degree root radius, uniform wall the full length, and a smooth as-extruded surface.

01What is an extruded aluminium angle?

An extruded aluminium angle is a solid L section pushed through a die while the metal is still hot and plastic, so the two legs and the corner come out as one single piece of metal with no weld, no fold and no seam. The section we make runs from 20 x 20 x 3 mm up to 100 x 100 x 15 mm, all in 6061-T6, with an equal leg on both sides and a wall held to ±0.15 mm.

The important words are *extruded* and *unequal*. Extruded means the corner radius, the wall and the surface all come from one die, so they are consistent for kilometre after kilometre. Unequal angles (legs of different length) are also made to order; the catalogue sizes are equal leg because that is what 90 per cent of buyers order.

Is a rolled or bent angle the same as an extruded angle?

No, and the difference shows up at the corner. A bent angle is folded from sheet, so the inside of the corner is a sharp crease with a measurable thinning of the wall, and the outside is stretched. An extruded angle has one controlled root radius equal to one wall thickness, and the wall is the same on both legs. If the corner has to carry a bolt or a weld, that difference matters.

Why does the wall tolerance sit at ±0.15 mm?

Because that is what a nitrogen-quenched 6061-T6 extrusion die holds after the run has stabilised. Tighter tolerances are possible on small sections but the reject rate and the price both climb. ±0.15 mm covers the draw-down at the die and the slight wall thinning that happens at the start of a billet in a long run.

The extruded equal leg angle. One root radius, one wall thickness, no fold and no seam along the full length.

02Extrusion versus bending versus roll forming

A buyer who only needs an L shape has three ways to get one. They are not interchangeable, and the cheapest one is rarely the right one for a load path.

Method	How it is made	Wall at corner	Length freedom	Cost shape
Extrusion	hot billet pushed through a die	uniform, one root radius	any length from one die	high die cost, low unit cost
Press bending	sheet folded on a brake	thinned and creased	coil length, one bend at a time	no die cost, high labour cost
Roll forming	sheet run through rolls	thinned, gradual curve	coil length	medium tooling, very low unit cost
Milling from plate	solid block machined	full, square corner	one part at a time	no tooling, very high unit cost

For anything under about 3 m of total length, bending from sheet can be cheaper because there is no die. Above that, extrusion wins on unit cost. Milling from plate only makes sense for prototypes where you need a perfectly sharp inside corner and the quantity is a handful of pieces.

The rule of thumb: if the corner is a load path or a bolt passes near it, buy extruded. If the angle is only a trim or a cover and the quantity is tiny, bent sheet is fine.

03How the die and the root radius work

The angle dies we run are flat dies, not porthole dies, because the section is open and there is nothing to weld back together behind the die face. The metal spreads from the billet into the two legs and the corner in one pass. That is why the corner is sound: there is no seam to hide.

The root radius, the arc inside the corner, cannot be smaller than one wall thickness. On a 40 x 40 x 5 mm angle the inside radius is therefore about 5 mm, and the outside radius about 10 mm. Buyers who ask for a sharp inside corner are usually thinking of a machined part; an extrusion physically cannot deliver it, and a drawing that specifies a 1 mm inside radius on a 5 mm wall will be rejected by any extruder.

Section	Wall	Inside radius	Outside radius	Weight
20 x 20 x 3 mm	3 mm	approx. 3 mm	approx. 6 mm	approx. 0.30 kg/m
30 x 30 x 4 mm	4 mm	approx. 4 mm	approx. 8 mm	approx. 0.60 kg/m
35 x 35 x 4 mm	4 mm	approx. 4 mm	approx. 8 mm	approx. 0.71 kg/m
40 x 40 x 5 mm	5 mm	approx. 5 mm	approx. 10 mm	approx. 1.01 kg/m
100 x 100 x 15 mm	15 mm	approx. 15 mm	approx. 30 mm	approx. 5.13 kg/m

04Wall thickness tolerance and what drives it

The wall tolerance of ±0.15 mm is not a marketing number, it is the practical floor for a 6061-T6 angle on a press of this size. Three things move the wall during a run: the billet temperature drifting between the front and the back of the billet, the ram speed as the die heats up, and the die wear over the life of the die. All three are held by the press controller, and the result is checked with a micrometer at the start and the end of every run.

What moves the wall	Effect	How it is held
Billet temperature drift	wall thins toward the back of the billet	billet preheat logged, front to back within 15 C
Ram speed change	wall grows as the die heats	ram profile set on the press controller
Die wear over the run	wall grows slightly	die replaced on a metre count, not on failure
Cooling distortion after quench	slight bow along the length	stretch straightened, then checked for straightness

If your application needs a tighter wall, the honest answer is to machine the angle after extrusion rather than to demand a tighter die. A machined face holds ±0.05 mm; an as-extruded face does not.

05Size selection for the common corner jobs

Most buyers arrive knowing the load and not the section. This table turns the load into a starting size; it is indicative, and a drawing still beats a rule of thumb.

Use	Starting size	Why	Wall note
Display frame corner	20 x 20 x 3 mm	light and cheap, reads finished	3 mm, no slot
Panel edge trim	30 x 30 x 4 mm	enough leg to cover a panel edge	4 mm, M5 or M6 only
Shelf bracket	35 x 35 x 4 mm	a step up in stiffness for the same wall	4 mm, M6
Machine frame corner	40 x 40 x 5 mm	carries a real moment, takes M8	5 mm, M6 or M8
Heavy gusset / base angle	100 x 100 x 15 mm	load path into a floor or a base	15 mm, M12 and up

06Mill finish, anodised and how the extrusion surface behaves

The as-extruded surface carries faint die lines along the length. They are cosmetic and they disappear under anodising or powder coating. Mill finish is the cheapest and is fine where the angle is structural and hidden.

Mill finish: no extra process, die lines visible, suitable for hidden structure.
Clear anodised: 10 to 15 micron, keeps the metal look, removes the die lines, and is the default for visible frames.
Black or coloured anodised: 10 to 15 micron, batch colour is controlled but assembly of two runs can show a shade step.
Powder coated: any RAL colour, thicker film than anodising, good for outdoor and for a brand colour.

Anodising is an insulator. If the angle is part of an electrical earth path, mask a bonding point before anodising or grind a small patch back to bare metal at assembly.

07Why extruded angle, and when to step up

Choose extruded equal leg angle

The corner carries load or a bolt lands on it
You need one wall thickness on both legs
The length is over about 3 m
You want a visible, consistent finished edge
The quantity justifies a die, or the size is standard

Choose another form

The part is a one-off prototype with a sharp inside corner
The quantity is a few metres and there is no die budget
You need an unequal leg in a size not carried
The part needs a closed box or a slot, not an L
The load is dynamic and needs a closed section

08Failure modes to design out

What goes wrong	Why it happens	Design it out by
Drawing rejected as unmachinable	inside radius specified below one wall thickness	set the drawing inside radius to at least the wall
Bolt tears out at the corner hole	edge distance under 2x the hole diameter	keep an M6 hole at least 12 mm from the edge on a 4 mm wall
Anodised shade step between deliveries	two anodising runs on one assembly	order the whole assembly from one anodising run
Angle bows along a long length	straightening skipped, or a long unsupported span	specify stretch straightened and add support points
Face not flat after coating	thick powder film on a face used as a datum	mask datum faces, or allow for the film in the tolerance

09What to check before you order extruded angle

Procurement checklist for extruded aluminium angle

Confirm the leg size and wall: for example 40 x 40 x 5 mm.
Confirm equal leg or unequal and the two leg lengths.
Confirm the alloy and temper: 6061-T6 is standard.
Confirm the cut length and the end cut: square or 45 degree mitre.
Confirm the hole pattern if the angle is drilled to drawing.
Confirm the finish: mill, anodised or powder coated.
Confirm the quantity in metres or pieces, and the packing.

10Questions buyers ask

What is the difference between extruded and bent aluminium angle?

An extruded angle is pushed through a die as one piece of metal, so the corner has one controlled root radius and the wall is uniform. A bent angle is folded from sheet, so the corner is creased and the wall thins there.

What is the smallest inside radius you can extrude?

One wall thickness. On a 5 mm wall the inside radius is about 5 mm. A sharper corner has to be machined, not extruded.

What wall tolerance do you hold?

±0.15 mm to EN 755-9 and GB/T 6892 on the standard range. Tighter than that is achieved by machining the face, not by the die.

What sizes are available?

From 20 x 20 x 3 mm up to 100 x 100 x 15 mm in equal leg. Smaller and unequal sections are made to order.

Which alloy and temper?

6061-T6 as standard. 6063-T5 is available where the part is welded.

How is it cut and finished?

CNC saw cut to length, ends square or mitred to ±0.5 degrees, then mill, anodised or powder coated.

What we need to quote an extruded angle

The leg size and wall, for example 40 x 40 x 5 mm.
Equal or unequal legs, and the two leg lengths.
The alloy and temper: 6061-T6 or 6063-T5.
The cut length and end cut: square or mitre.
The hole pattern if drilled.
The finish: mill, anodised or powder coated.
The quantity in metres or pieces.

Send those seven items and the quotation comes back with the extrusion, cutting, drilling and finish broken out separately. Browse the full aluminium profile catalogue and the angle profiles range.

Need an extruded angle quoted for a real corner load?

Send the leg size, the wall, the cut list and the finish. We quote the extrusion, cutting, drilling and anodising as separate lines.

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