Aluminium Angle Profile 30 x 30 x 4 mm Light Duty Corner Section
30 x 30 x 4 mm light duty aluminium equal leg angle in 6061-T6. A solid corner section for display frames and light framing, with no slot.
| Material | Aluminium |
|---|---|
| Alloy Grade | 6061-T6 |
| Temper | T6 |
| Section Size | 30 x 30 x 4 mm |
| Slot | Not applicable, this is a solid equal leg angle with no slot |
| Length | Saw cut to length, ends square or 45 degree mitre, +/-0.5 mm |
| Tolerance | EN 755-9, wall +/-0.15 mm |
| Surface | Mill finish / clear anodised / black anodised |
| MOQ | Made to order; small quantities from stock |
| Lead Time | Typically 1 to 2 weeks for cutting and drilling, plus a week for anodising |
| Loading Port | Shanghai, Ningbo, Qingdao |
| Supply Ability | In-house saw cutting, drilling and CNC machining capacity |
| 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 |
01What is the 30 x 30 x 4 mm angle profile?
What does this angle do that T-slot profile does not?
It gives you a solid, cheap corner without any groove geometry. A 30 x 30 x 4 mm angle bolted across a corner reinforces it and finishes the edge at the same time. For a display frame or a light guard, that is often all you need, and it is less expensive than a T-slot section of the same size.
How much load can it carry?
Not much. At 4 mm wall and 30 mm legs, the section modulus is about 1.6 cm3, so it is a light duty corner. It suits display frames, light panels and trim, not a loaded machine frame. As a brace, keep the length under about 0.7 m.
Is it 6061 or 6063?
6061-T6 is standard for this section. It is stronger than 6063-T5 and still anodises well. If you need to weld it, ask for 6063-T5 instead.
02Section data
| Item | Value | Note |
|---|---|---|
| Leg length | 30 mm both legs | equal leg angle |
| Wall | 4 mm | light duty |
| Section modulus | approx. 1.6 cm3 | per principal axis |
| Slots | none | solid section |
| Alloy | 6061-T6 | EN AW-6061 |
| Weight | approx. 0.60 kg/m | from published section |
| Standard | EN 755-9 / GB/T 6892 | wall tolerance +/-0.15 mm |
| Cut | saw cut, ends square or mitred | to +/-0.5 mm |
03Display frames and light guards
The 30 x 30 x 4 mm angle is the workhorse of display and exhibition frames. It is stiff enough to hold a panel, light enough to move, and its smooth corner reads as finished without a cover cap.
- Display frames: the angle forms the corner and the panel sits inside the leg, held by a screw or a clip.
- Light guards and covers: a simple frame of angle around a machine panel, holding a mesh or a polycarbonate sheet.
- Shelf and rack corners: a short length of angle ties a shelf to its upright, spreading the load across the corner.
- Trim and edge protection: the angle on an exposed edge protects it and finishes the corner.
In every case the load is light and static. If the frame has to carry a person’s weight or a machine’s operating load, move up to the 50 x 50 x 9 mm or larger.
04Cutting accuracy and mitre joints
The one place a light angle goes wrong is the cut angle. A display frame with mitred corners only looks right if the cuts are within half a degree, otherwise the corners show a visible gap or a step.
| Joint | Cut | Required accuracy | Why it matters |
|---|---|---|---|
| Square butt joint | 90 degree square | +/-0.5 mm length | panels sit flush |
| Mitred corner | 45 degree mitre | +/-0.5 degrees | no visible corner gap |
| Brace ends | 45 degree both ends | +/-0.5 degrees | brace seats on both faces |
We cut on a CNC saw, so the 45 degree mitre is held to +/-0.5 degrees. If the frame is anodised after cutting, the anodising fills the cut face and the corner reads as a single line.
05Load limits and span guidance
| Use | Max load | Max span | Notes |
|---|---|---|---|
| Display panel corner | up to 5 kg per corner | frame under 1.2 m | static load only |
| Light guard frame | up to 10 kg total | frame under 1.5 m | add a mid rail |
| Shelf support | up to 15 kg per shelf | shelf under 0.6 m | use two angles |
| Brace (compression) | up to 1.5 kN | under 0.7 m | shorten if buckling |
These are indicative. The angle is forgiving for static display loads but reaches its limit quickly once a load is repeated or reversed. For anything dynamic, use a thicker wall or a T-slot section.
0630 x 30 x 4 vs 50 x 50 x 9
Choose the 30 x 30 x 4
- The frame is a display, guard or trim, not a load path
- Weight and cost per metre matter
- The corner carries a light, static load
- The frame is under 1.5 m and does not need bracing
- The angle is also the visible trim
Choose the 50 x 50 x 9
- The frame is a machine frame with a real load
- The corner carries a medium moment
- M8 bolts are needed (the 30 x 30 x 4 takes M5 or M6)
- The frame is over 1.5 m and needs bracing
- The angle is a gusset or brace, not a trim
07Failure modes to design out
| What goes wrong | Why it happens | Design it out by |
|---|---|---|
| Corner opens under a heavy panel | the 4 mm wall is too light for the load | use two angles per corner, or step up to the 50 x 50 x 9 mm |
| Bolt tears out at the hole edge | edge distance is under 2x the hole diameter | keep M5 holes at least 10 mm from the edge |
| Mitre gap at the corner | the cut angle is off by more than half a degree | cut on a CNC saw, and specify the mitre on the drawing |
| Brace buckles | the brace is over 0.7 m long under compression | shorten the brace or use a thicker wall |
| Anodising colour mismatch | the angle and frame are from different runs | specify a single anodising run |
08What to check before you order
Procurement checklist for the 30 x 30 x 4 angle
- Confirm the size and wall: 30 x 30 x 4 mm.
- Confirm the alloy: 6061-T6 is standard; 6063-T5 for welding.
- Confirm the cut length and end cuts: square or 45 degree mitre.
- Confirm the hole pattern if drilled to drawing.
- Confirm the finish: mill or anodised.
- Confirm the quantity in metres or pieces.
09Terms used on this page
- Equal leg angle
- An L-section with both legs the same length.
- Section modulus
- A geometric property, in cm3, determining bending strength. The 30 x 30 x 4 mm has about 1.6 cm3.
- Mitre joint
- A corner where two members are cut at 45 degrees and meet at a right angle.
- Brace
- A diagonal member carrying axial load to stop a frame racking.
- Buckling
- Sudden sideways failure of a slender member under compression.
10Questions buyers ask
What is the 30 x 30 x 4 mm angle used for?
Display and exhibition frames, light guards, shelf supports and trim. It is a light duty solid corner section with no slot.
How much load can it carry?
Light, static loads: up to about 5 kg per corner on a display frame, or up to 15 kg per shelf when used in pairs.
What bolt sizes fit?
M5 and M6. The 4 mm wall is too thin for M8. Keep the hole at least 10 mm from the edge.
Can it be anodised?
Yes. Mill or anodised. Anodising after cutting fills the cut face and the corner reads as one line.
What is the weight per metre?
Approximately 0.60 kg/m for the 30 x 30 x 4 mm section.
What is the lead time?
One to two weeks for cutting and drilling, plus a week for anodising.
What we need to quote this section
- The size and wall: 30 x 30 x 4 mm.
- The alloy: 6061-T6 or 6063-T5.
- The cut length and end cuts (square or mitre).
- The hole pattern if drilled to drawing.
- The finish: mill or anodised.
- The quantity in metres or pieces.
Send those six items and the quotation comes back with the material, cutting, drilling and finish broken out separately. Browse the full aluminium profile catalogue and the angle profiles range.
Need this light duty corner quoted for your display frame?
Send the size, cut list, hole pattern and finish. We quote material, cutting, drilling and anodising as separate lines.
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