20 x 20 Aluminium Extrusion 6.2 mm Slot Stock Lengths and MOQ

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

20 x 20 mm aluminium extrusion with a 6.2 mm slot, supplied in 6 m stock lengths or cut to size. 0.62 kg/m, 6063-T5, entry from a single bar.

Wholesale Price Quoted per metre against quantity, finish and cutting per metre

Material	Aluminium
Alloy Grade	6063-T5
Temper	T5
Section Size	20 x 20 mm
Slot	4 x 6.2 mm groove, 6 mm mouth, 20 mm pitch, 1 slot per face, M5 and M6
Length	6 m stock length; cut to list to +/-0.5 mm, chamfer on request
Tolerance	EN 755-9 / GB/T 6892, wall +/-0.15 mm; cut length +/-0.5 mm
Surface	Mill finish / clear anodised / black anodised
MOQ	One bar from stock in mill finish; anodised orders limited by the anodising batch, often 100 to 300 kg
Lead Time	Typically 2 to 3 weeks for mill finish from stock, plus about a week for anodising
Loading Port	Shenzhen, Guangzhou, Ningbo
Supply Ability	Stock holding of standard sections plus in-house saw cutting; about 20 tonnes per month of cut profile
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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20 x 20 mm four slot aluminium extrusion section with 6.2 mm groove dimensions — The section that most enquiries are actually about: 20 x 20 mm, 6.2 mm groove, 0.62 kg/m. Everything on this page is about the commercial terms around it.

01What does “stock length” actually mean here?

It means 6 metres, mill finish, from a die that is already running. You can buy one bar or one bundle without paying for a die, because the die exists and the section is being extruded for other customers. That is the practical difference between a stock section and a made-to-order one, and it is the reason a 20 x 20 mm extrusion at about 0.62 kg/m is the cheapest way into an aluminium frame project.

Six metres is not a arbitrary number. It is the longest length that most extruders can handle consistently through the press, the anodising line and the ageing oven, and it is the length that packs and ships without a special crate. It is also, as the next section explains, exactly one metre too long for a 20 ft container.

Standard stock length: 6 m
Weight per bar: about 3.72 kg at 0.62 kg/m
Bars per tonne: about 269
Cut to size: available, quoted per cut plus material
Die charge: none on a stock section

02Why will a 6 m bar not fit in a 20 ft container?

Because a 20 ft container has an internal length of 5.898 m. Six metre bars do not go in, at any angle that does not destroy the load. This catches out first-time buyers regularly: the freight is quoted for a 20 ft, the material arrives at the port, and the forwarder comes back asking for a 40 ft.

Container	Internal length	Can it take 6 m bars	Practical note
20 ft GP	5.898 m	No	Cut to 5.8 m, or ship in a 40 ft
40 ft GP	12.032 m	Yes	Bars loaded lengthwise, two bundles deep
40 ft HQ	12.032 m	Yes	Extra height helps with bundle stacking
LCL	varies	Usually yes	Check the consolidation warehouse, not just the vessel

The weight side is simpler. A 40 ft high cube has a payload of about 26.5 tonnes, and aluminium profile is dense enough to be weight limited rather than volume limited. In practice a 40 ft takes about 20 to 24 tonnes of profile, which in 20 x 20 at 0.62 kg/m works out at roughly 32,000 to 38,000 metres. That is a lot of frame, and it is why most buyers never approach a full container on this section.

If your order is under about 3 tonnes, the freight per tonne usually costs more than the material. Consolidating with other sections into one shipment, or buying through a stockholder locally, is often cheaper overall even at a higher unit price.

03What does the MOQ actually depend on?

Not on a single number. Three different things set a minimum, and confusing them is why quotations appear inconsistent between suppliers.

Situation	What sets the minimum	Typical entry point on this section
Stock section, mill finish	Packing and handling, not the die	One bar, or one bundle of about 50 to 80 kg
Stock section, anodised	Anodising batch size — the line runs full batches	Often 100 to 300 kg, because a part batch is charged as a full batch
Stock section, cut to list	Saw set-up and packing labour	About 100 m, or the quantity at which the set-up is worth amortising
Custom die	Die cost plus a minimum press run by weight	Die cost plus several hundred kilograms; the metre minimum follows from the weight
Custom colour anodising	Batch scheduling with other work of the same shade	Whatever the batch is, and it is usually the highest minimum of the five

The consequence for this section is worth stating plainly. Because 20 x 20 is light, a weight-based minimum converts into a large metre minimum. A 500 kg die run is about 800 m of 20 x 20, but only about 116 m of a 60 x 60 at 4.3 kg/m. If a supplier quotes a metre minimum for a custom die, check whether it is really a weight minimum in disguise — the two give very different answers depending on the section.

04How do cut charges work?

Two models, and the difference matters on a long cut list. Either you are charged per cut, or you are charged a cutting allowance on the material — a few per cent added to the billed length for each piece. Per-cut is transparent and gets expensive on short pieces; allowance is cheaper on a big list and harder to audit.

A cut takes about 10 to 20 seconds of machine time, but the handling dominates. Twenty short pieces cost far more per metre than two long ones.
Cut tolerance is normally plus or minus 0.5 mm. Tighter than that moves the work from a saw to a machining centre and changes the price completely.
Ends are deburred as standard. A chamfer on the end is a separate operation and should be asked for explicitly.
If the pieces are going into an anodising batch, cut before anodising, never after.
Ask what happens to the offcut. On a 6 m bar with a 2.3 m cut list you are paying for 3.7 m of material unless the offcut is credited or returned.

Stock length is 6 m. A cut list is quoted against the bar, so the offcut is part of the commercial conversation, not an afterthought.

05How is tiered pricing normally structured?

Four steps, and each one exists for a different reason. Knowing which step you are on explains most of the price difference between two quotations for the same drawing.

Step	Quantity	What drives the price	What changes at this step
Sample	1 to 5 bars or short cuts	Handling and freight dominate	You are buying information, not material
Trial order	50 to 200 kg	Set-up and packing per order	Price per kg is highest here in relative terms
Production	500 kg to 5 tonnes	Material and machine time	The step where most of the real price reduction happens
Container or tonne	10 tonnes and up	Mill scheduling and freight per tonne	Price approaches the metal plus conversion cost

Two things do not follow this curve. Anodising is priced per batch, so it is flat and then steps down sharply at batch boundaries rather than sliding with quantity. Cutting is priced per piece, so it scales linearly and never gets a volume discount worth chasing. If a quotation looks out of line, check which of the three components — material, anodising, cutting — is carrying the difference.

066063-T5 or 6061-T6 on a 20 x 20?

6063-T5, the standard

Better extrudability, so thinner walls and sharper corners are achievable
Anodises to a more uniform appearance
Lower yield strength, adequate for frames and enclosures
Stocked, so no die charge and short lead time
The default for anything architectural or visible

6061-T6, on request

Higher yield strength, useful where the frame carries load
Harder to extrude in thin wall, so tooling cost rises
Anodised appearance is less uniform, more grey
Usually made to order, so a die and a longer lead time
Worth it only when a calculation says 6063 is not enough

On a 20 x 20 section the wall is thin, so 6061 is the more difficult alloy to run and the benefit is smaller than it would be on a heavy section. If a 20 x 20 frame is marginal in 6063, the usual correct answer is a larger section in 6063 rather than the same section in 6061.

07What has to be in the enquiry for the price to hold?

Eight items. A quotation missing any of them is an estimate, and it will move once the details arrive — usually upward.

Enquiry checklist for 20 x 20 extrusion

Section and alloy, or the application if you want a recommendation
Total quantity in metres, and the number of pieces
Cut list, if cutting is required, with tolerance
Finish: mill, clear anodised or black anodised, and the micron range
Whether cut faces need re-sealing after anodising
Packing requirement: bundle, crate, or individual bagging
Destination port, and whether the order is FOB or delivered
Whether the offcut from the cut list is to be returned or credited

The two items that most often change a price after the fact are the finish and the cut list. Both are easy to state up front and expensive to add later, because both force a re-schedule rather than an adjustment.

08Questions buyers ask before placing a first order

Related sections and categories

Browse 20 Series Aluminium Profiles, Aluminium Sections, the 20 x 20 mm four slot section, or see the 20 x 60 mm eight slot rail for the full section data.

What is the minimum order for 20 x 20 aluminium extrusion?

For mill finish from stock, a single bar. For anodised stock, the minimum is usually set by the anodising batch rather than the profile, often 100 to 300 kg. For a custom die the minimum is a die charge plus a press run by weight, which on this light section converts into a large number of metres.

Can you ship 6 m bars to a 20 ft container?

No. A 20 ft container has an internal length of 5.898 m. Either the bars are cut to 5.8 m, or the shipment goes in a 40 ft. This is worth settling before the freight is booked.

How much is a 6 m bar of 20 x 20?

About 3.72 kg of material at 0.62 kg/m, plus cutting if required and plus finish. Price is quoted per metre against quantity and finish rather than per bar, because the bar is a packing unit and not a commercial unit.

Do you credit the offcut if my cut list does not fill a bar?

It can be quoted either way. State the preference on the enquiry: material billed on the cut list with the offcut returned, or material billed on whole bars with the offcut kept. Whole-bar billing is normally cheaper per piece and leaves you with usable short lengths.

What is the lead time for a trial order?

Typically 2 to 3 weeks for mill finish from stock, plus about a week if anodising is required. A trial order does not get a faster slot than a production order, so the lead time is set by the finish, not by the size.

What to send for a 20 x 20 extrusion quotation

Total metres and number of pieces
Cut list with lengths and tolerance, if cutting is needed
Finish and micron range, or mill finish
Alloy: 6063-T5 standard, or 6061-T6 on request
Packing: bundle, crate, or bagged
Destination port and trade term
Offcut preference: returned, credited, or kept
Required delivery date, so the anodising batch can be scheduled

If the project is at an early stage, ask for a price at three quantities — trial, production and container. The shape of the curve tells you more about the supplier than any single number does.

Ask for three quantities, not one

Send the total metres, the cut list and the finish. We will price a trial order, a production order and a container so you can see where the price actually steps down.

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