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EN AW 6060 / UNS A96060

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EN AW 6060 (or AlMgSi0.5) aluminium alloy is one of the general purpose machinable aluminium alloys and is known in particular for its good mechanical properties, good corrosion resistance and good machinability. The alloy is one of the aluminium-silicon-magnesium (Al-Si-Mg) alloys and is particularly suited to machining and structural applications.

6060 T6 is a moderate strength material for the machinery and construction industries, with high formability.​‌​​‌​

Machinability: It stands out in particular for high machinability and good weldability. It is relatively easy to machine and is suited to a variety of machining methods.

Turning and milling: Cutting speed — it can be machined at medium cutting speeds. Cutting tools — good results are obtained with carbide inserts or hardened steel tooling. Cooling — a good cutting fluid is recommended during machining.​‌​​‌​

Weldability: It has excellent welding properties and can readily be welded by the TIG and MIG methods. The material to be welded should be clean and care should be taken so that thermal stress does not arise during welding.

Heat treatment: It is generally processed by hot or cold forming. When heat treatment is applied the material can gain a certain hardness, although the natural properties of the alloy are generally sufficient in themselves.​‌​​‌​

What EN AW-6060 Is — and Why It Is Not the Same Thing as 6063​‌​​‌​

EN AW-6060 (chemical symbol EN AW-AlMgSi / W.Nr. 3.3206 / AA 6060 / UNS A96060) is a heat-treatable Al-Mg-Si (6xxx) extrusion alloy. Its nominal composition is 0.30-0.60 % Si and 0.35-0.60 % Mg; copper is effectively absent (≤0.10 %), manganese is effectively absent (≤0.10 %), chromium is effectively absent (≤0.05 %). This alloy does not exist for strength. It is the leanest member of the 6xxx family and therefore the easiest to extrude, the best for surface finish and the best for anodizing.

The honest one-line definition: 6060 sells shape and surface, not strength. Under EN 755-2 the minimum proof stress of a 6060-T6 profile is around 140-150 N/mm²; the same table gives 6082-T6 250-260 N/mm². So if you are designing a structural member, 6060 is the wrong alloy — but if you want a thin-walled, complex, decoratively anodized profile, you could not extrude that shape in 6082 at all.​‌​​‌​

The single most common buyer error is treating 6060 and 6063 as the same material. In the old DIN world both were called AlMgSi0.5, and that name still circulates in the market. EN 573-3 defines them as two separate alloys and EN 755-2 gives them two separate sets of minima. The difference is not small: at the same temper and wall thickness, 6063 is roughly 13 % stronger in tensile than 6060.

The real selling argument for 6060: the surface that comes off the press

The iron band of 6060 is remarkable: 0.10-0.30 % Fe — that is not just an upper limit, there is also a LOWER limit. Most aluminium alloys have no such thing. Here iron is not an impurity, it is a deliberate grain-structure control: it restrains grain growth during extrusion and keeps the anodized surface uniform. Exceeding the upper limit, on the other hand, produces dark specks and a grey cast after anodizing.​‌​​‌​

The same logic drives the other ceilings. Manganese ≤0.10 % and chromium ≤0.05 % are held down because both make the anodic film grey, cloudy and hazy. Copper ≤0.10 % is held down because copper degrades corrosion resistance and shifts anodized colour. The chemistry of 6060 is optimised for appearance, not for strength. That is exactly why 6082 (Mn 0.40-1.0 %, Cr ≤0.25 %) scores poorly on decorative anodizing and 6060 scores best.

Commercial consequence: in architectural façades, window and door systems, lighting housings, furniture profiles, exhibition systems, handrails and decorative cladding, 6060 is the default alloy, and the reason is not price but the repeatability of the anodized appearance. Offering 6082 for that work is selling the customer an appearance claim.​‌​​‌​

Standards by Product Form

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The standards map of 6060 differs from the rest of the 6xxx family: this is an EXTRUSION alloy and its standards say so. There is no counterpart in sheet, plate, forging or fastener form — that is not a gap, that is the definition of the alloy.

Product Forms With NO Standard — the Commercially Valuable Section

Nothing loses more money on the sales side than quoting against a standard that does not exist. For 6060 these gaps are clean, and knowing them in advance turns into negotiating leverage.​‌​​‌​

Chemical Composition​‌​​‌​

The limits below follow EN 573-3. Note that iron has a lower limit — that alone places 6060 apart within the 6xxx family.

A direct consequence of the chemistry: low quench sensitivity

The total alloy load of 6060 is low and Mn/Cr dispersoids are practically absent. In practice that means Mg and Si stay largely in solid solution even on slow cooling. 6060 is therefore a low quench-sensitivity alloy, and it can be solution treated at the press exit by air or water-spray cooling (press quench). No separate solution furnace is needed.​‌​​‌​

That is the whole economics of 6060. The profile leaves the press, is cooled at the exit, stretched, cut and goes straight into the ageing oven — one heat-treatment line, one energy line item. 6082 or 6005A cannot do that in heavy sections; they need a separate solution furnace and a water quench, which means cost, distortion and surface risk. 6060 being cheap is not a quality signal; it is a process outcome.

The Temper System — T4, T5, T6, T64, T66​‌​​‌​

The temper system of 6060 is a product of European extrusion practice and has no one-to-one equivalent in the ASTM world. T64 and T66 in particular are European tempers defined by EN 515; you will not find them on an American datasheet. The definitions below are decisive for purchasing.​‌​​‌​

The one-line purchasing summary​‌​​‌​

You will bend it → T4 (or T64 if you can get it). Long architectural profile that must stay straight → T5. Standard structural profile → T6. You need more strength from the same section and can live with distortion → T66. And none of them reaches 6082-T6 — at that point you have to change alloy, not temper.

Mechanical Properties​‌​​‌​

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Every value below is an EN 755-2 / EN 754-2 MINIMUM, not a typical value. Real production typically lands 10-20 % above these numbers, but the number used in design and in the contract is the minimum. The hardness values (HBW) are informative, not mandatory acceptance criteria of the standard.

CONFLICT NOTICE — thickness break and elongation. Two separate groups of sources put the T6 and T66 thickness break at 3 mm (≤3 mm and >3-25 mm), while another group puts it at 5 mm (≤5 mm and 5-25 mm). Likewise elongation appears as 6 % in one group and 8 % in the other. The most likely explanation is that EN 755-2 carries two elongation definitions: A (proportional specimen, 5.65√S₀) and A₅₀mm (fixed 50 mm gauge length). The fixed gauge length typically reads higher. State in the order which elongation definition is the acceptance criterion and confirm the thickness break against the relevant edition of EN 755-2. Both values are printed here because we could not independently verify a single answer.

Physical Properties​‌​​‌​

The physical properties of the 6xxx family are largely temper-independent; the one clear exception is electrical and thermal conductivity, which is sensitive to how much alloying element remains in solid solution. The aged condition (T5/T6) is more conductive than the solution-treated condition (T4).

Heat Treatment, Press Quenching and Thermal Stability

Solution treatment​‌​​‌​

The published solution-treatment band for 6060 is 525-540 °C. But in the commercial reality of 6060 that furnace is often never used at all. The extrusion press itself already runs in the 450-500 °C band, and as the profile leaves the die the Mg and Si are largely in solid solution. If it is cooled fast enough at the press exit, no separate solution treatment is needed. That operation is called a press quench (press solution heat treatment).

Press quenching — the reason 6060 exists​‌​​‌​

How aggressively it is cooled directly determines which temper you get:
· T4: cooled at the exit, no artificial ageing; 5-8 days of natural ageing.
· T5: forced-air cooling at the exit plus oven ageing. No water. Less distortion, less residual stress, lower strength.
· T6: aggressive water-mist or intense-air cooling at the exit plus oven ageing.
· T66: the same route as T6 but with more aggressive cooling and Mg/Si toward the top of their bands. Strength is gained, straightness is lost.
This is possible because 6060 has low quench sensitivity. Its total alloy load is small and Mn/Cr dispersoids are practically absent; those dispersoids would otherwise act as heterogeneous nucleation sites during the quench and pull solute out of solution. In 6060 that mechanism is nearly missing. Compare: 6082 (Mn 0.40-1.0 %) is strongly quench sensitive and a press quench is not enough in heavy sections.

Artificial ageing​‌​​‌​

The published band is 155-190 °C for 4-16 hours. In practice the typical T5 and T6 cycle sits in the 175-185 °C band for a few hours, but the exact cycle is plant-specific and a process secret — do not use the band on this page as a recipe. T64 is defined by deliberately cutting that cycle short (underageing): it is stopped before peak hardness so that elongation stays around 12 %.

Natural ageing and the shelf-life problem​‌​​‌​

T4 is not a stable condition. Solution-treated 6xxx keeps ageing at room temperature; the main change happens within 5-8 days but it never fully stops. Two practical consequences follow:
1. Bending, curving and roll forming should be done as soon as possible after the quench. Some fabricators keep profiles in a freezer for exactly this reason — low temperature effectively halts natural ageing.
2. Natural ageing can spoil a later artificial ageing. A 6xxx alloy left a long time in T4 can reach a lower peak strength when subsequently aged to T6 than freshly quenched material would. The effect is weaker in 6060 than in 6082 thanks to the leaner chemistry, but it is not zero. If a supplier says “we have T4 stock, we will age it to T6”, ask how old that stock is.

Thermal stability — 6060 is not a temperature alloy​‌​​‌​

The service temperature limit of the 6xxx family is the coarsening (overageing) temperature of the Mg₂Si precipitates that give it strength. The numbers published on the AlSi1MgMn side are about 120-135 °C long term and about 155-170 °C short term, and the same physics applies to 6060. Above that the material softens permanently and does not recover on cooling. A few hours at 200 °C effectively takes a T6 profile down to T4 level. Powder-coat ovens, thermal drying, post-weld straightening heat and the continuous hot spot inside an LED or power-electronics housing are therefore a risk to be measured, not a design assumption.

Powder coating deserves a note of its own. A typical aluminium powder-coat cure is 180-200 °C for 10-20 minutes, and that is squarely inside the artificial-ageing band. In practice this is either neutral or mildly additional ageing for T5/T6 profiles; but if you run a T4 profile through powder coating it is partially aged and is no longer T4. Plan the bending BEFORE the coating line.​‌​​‌​

Welding

6060 is a weldable alloy — and it loses strength everywhere it is welded. Both sentences are true, and the second one is missing from most datasheets.​‌​​‌​

The strength lost in the HAZ — with numbers​‌​​‌​

Welding a 6xxx profile effectively re-solutionises a narrow band next to the fusion line and then cools it without control. The result: Mg₂Si precipitates coarsen in that band and the strength the temper provided is gone. The HAZ typically falls to around T4 level — for 6060-T6 that means the proof stress heading from about 150 N/mm² toward about 60 N/mm².

No independently verified published HAZ loss percentage was found for 6060, and none will be invented on this page. Measurements on the sister alloy 6082-T6 give the shape of the answer: in a MIG joint with ER5356 filler, parent metal at 289.88 N/mm² tensile against a joint at 222.09 N/mm² was measured — a 76.6 % joint efficiency; elongation fell from 19.2 % to 11.4 %. A mill sheet for the same alloy is far more pessimistic: “mechanical properties reduce approximately 50 % after welding.” The two numbers do not contradict each other, they measure different things: 76.6 % is a measured ultimate tensile; the 50 % corresponds to the proof-strength reduction factor used in design. If you are designing, use the pessimistic one.​‌​​‌​

The correct route for design is EN 1999-1-1 (Eurocode 9). Eurocode 9 treats the HAZ of a welded 6xxx joint as a separate region and defines reduction factors for both proof and ultimate strength, and it also accounts for the physical width of the HAZ measured from the fusion line. One measured reference: in a 6082-T6 MIG joint the minimum-hardness zone was found 9.5-10.5 mm from the weld centre. So the HAZ is not the weld itself; it is a centimetre away, and that is where the failure occurs. The numerical factor table of Eurocode 9 is not reproduced here because it could not be independently verified; use the standard’s own table in design.

What can be done after welding​‌​​‌​

Partial recovery exists; full recovery is expensive. If the part is re-aged artificially after welding (around the 175 °C band), the HAZ recovers somewhat beyond natural ageing — but it does not return to T6, because the precipitates have already coarsened. Full recovery requires re-solution treatment, re-quenching and re-ageing after welding, which is impractical on a welded assembly of thin profiles because of distortion. The correct engineering answer is to move the weld into a low-stress region or to switch to mechanical joining.

Machining​‌​​‌​

Here honesty is required: 6060 is the WORST-machining alloy in the 6xxx family. On one extruder’s 0-3 machinability scale, 6060 = 1, 6063 = 2, 6005A = 2 and 6082 = 2. The reason is simple: a soft, ductile, lean alloy does not break chips cleanly. The chip comes off long, helical and continuous; it wraps around the tool, scratches the surface and stops automatic machines.

Corrosion — Where It Is Good, Where It FAILS

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6060 is among the least troublesome aluminium alloys in corrosion terms — and precisely for that reason it matters to know where it fails. On one mill’s 1-5 scale it scores 1 (very good) in normal atmosphere and 2 (good) in seawater.​‌​​‌​

Why it is this good

There are two reasons. The first is the effective absence of copper (≤0.10 %): copper is the element that breaks down the passive film and creates micro-galvanic couples in aluminium, and it is the root of the corrosion troubles of the 2xxx and 7xxx families. The second is the low total alloy load: the less second phase precipitated on the grain boundaries, the fewer paths exist for intergranular corrosion.​‌​​‌​

And one very important failure mode is ABSENT in 6060: stress corrosion cracking. 6xxx alloys are practically not susceptible to SCC; in NASA’s MSFC-STD-3029 classification 6061 sits in the “high resistance” class (Table I) in all tempers — meaning no cracking is seen in 30 days at 75 % of the yield strength. The same physics holds for 6060. Compare that with 7075-T6: the same standard puts it in the “low resistance” class (Table III). See EN AW-7075.

WHERE IT FAILS — 1: galvanic couples​‌​​‌​

The most frequent and most expensive 6060 failure is not corrosion of the alloy but the metal it touches. Aluminium sits at the active end of the galvanic series; against stainless steel, carbon steel, copper, brass and graphite it becomes the ANODE and it is sacrificed. The classic architectural scenario: anodized 6060 façade profile + stainless screw + rainwater. Within a few years white corrosion bloom and pitting appear around the screw.
Fix: nylon/polyamide isolating washers, coated fasteners, adhesive isolation, and where possible keeping the joint dry. The cathode-to-anode area ratio decides the severity: a small aluminium part against a large stainless surface is the worst case.

WHERE IT FAILS — 2: alkaline media and contact with concrete or mortar​‌​​‌​

The passive oxide film on aluminium is stable roughly between pH 4 and 9. Outside that band it dissolves. The alkaline side is more dangerous to aluminium than the acid side because the attack is fast and continuous. In practice:
· Fresh concrete and cement mortar (pH 12-13) will stain and pit an anodized 6060 profile within hours. Profiles splashed with concrete on site must be washed immediately.
· Alkaline cleaners (oven cleaner, strong detergent, soda water) dissolve the anodic film. Façade cleaning must use neutral-pH cleaners only.
· Hard or alkaline water in continuous contact dulls the anodic film.

WHERE IT FAILS — 3: crevice corrosion and chloride environments​‌​​‌​

The seawater rating is 2 out of 5 — good, but not excellent. In marine atmosphere 6060 pits at the surface; usually this is a cosmetic rather than a structural failure, but on an anodized façade it is unacceptable. The real risk is CREVICES — under gaskets, under weather seals, at joints: in regions the oxygen cannot reach and chloride accumulates, the film cannot repair and deep pitting starts. When a coastal project genuinely needs a marine alloy, the right family is 5xxx — see EN AW-5083 and EN AW-5754.

WHERE IT FAILS — 4: the weld bead​‌​​‌​

Welding damages the corrosion behaviour of 6060 in two ways. First, precipitated second phase concentrates in the HAZ and opens a local path for intergranular corrosion. Second, a galvanic difference between filler and parent metal appears: 5xxx filler (5356/5183) is slightly more active than 6060, and in a chloride environment the bead can corrode preferentially. Practical rule: if welded 6060 will see a corrosive environment, put the bead under paint or coating.

WHERE IT FAILS — 5: bad anodizing​‌​​‌​

Anodizing is not a coating; it is the metal itself, controllably oxidised — which is why it does not peel or flake. But done badly it does not protect. Two classic errors:
1. Insufficient film thickness. Exterior façade work typically requires 20-25 μm; 10-15 μm suffices indoors. Applying an indoor thickness outdoors means the film wears through in a few years and pitting begins underneath.
2. Incomplete sealing. The anodic film is porous and must be sealed in boiling water or nickel acetate. An unsealed film behaves like a sponge for dirt and chloride and causes colour fading in dyed anodizing. For façade work, specify anodizing to a quality-assurance scheme such as Qualanod or Qualicoat and write it into the order.

Anodizing — the actual product of 6060​‌​​‌​

This is where the advantage of 6060 over the other 6xxx alloys is measured. On one mill’s 1-5 scale 6060 scores protective anodizing 1, decorative anodizing 1-2. Compare: on the same scale 6082 scores protective anodizing 1 but decorative anodizing 3. Those two points decide whether a façade project is accepted. The cause is chemistry: the 0.40-1.0 % manganese and ≤0.25 % chromium of 6082 leave light-scattering second-phase particles in the anodic film, producing a grey, hazy, batch-to-batch variable surface. In 6060 those elements are effectively absent.

6060 is suitable for all three anodizing types: decorative (dyed or natural), protective and hard anodizing. One mill sheet rates all three at the top mark. A caution on hard anodizing: the film is very hard but brittle, and it lowers the fatigue strength of the metal underneath; on moving or vibrating parts hard anodizing can be a crack initiator.​‌​​‌​

Frequently Asked Questions

My supplier says “6060 and 6063 are the same thing, AlMgSi0.5”. Is that right?​‌​​‌​

No, and the difference reaches the contract. In the old DIN 1725 world both were called AlMgSi0.5, and that name still circulates today. But EN 573-3 defines them as two separate alloys, and the distinction is essentially in magnesium: the Mg band of 6060 is 0.35-0.60 % while 6063 runs at a higher Mg level.
The consequence shows up directly in the EN 755-2 minima. Profile, T6, thin wall: 6060 Rm ≥190 N/mm², 6063 Rm ≥215 N/mm². In T66 the gap widens: 6060 Rm ≥215, 6063 Rm ≥245. Same section, same temper, a 13-14 % difference in strength.
Practical consequence: if you calculated with 6063 values and the supplier shipped 6060, your profile is not below standard but your calculation is void. Read the alloy number on the certificate, not the DIN name; a certificate that says “AlMgSi0.5” does not tell you which alloy you received. Always write EN AW-6060 or EN AW-6063 into the order text, never the old DIN name. The same logic applies on the tolerance side: EN 12020-2 covers both, so the tolerance standard does not tell you which alloy you bought either.

Our façade profiles came out of anodizing streaked and banded. Is it the alloy or the anodizer?​‌​​‌​

There is a third possibility and it is usually the real culprit: the extrusion process. Anodizing magnifies the sub-surface structure of the metal; it is not something the anodizer can fix.
1. Chemistry control. The iron band of 6060 is 0.10-0.30 %, and that is not an upper limit but a two-sided band. Iron near the top of the band gives a grey cast and dark specks. Exceeding the manganese (≤0.10 %) or chromium (≤0.05 %) limits produces a hazy, matt, unmeasurable colour. Read the Fe, Mn and Cr values on the certificate — even inside the EN 573-3 limits, where they sit within the band determines the appearance.
2. Extrusion banding. Flow differences at the die exit leave different grain sizes in different regions of the profile, and anodizing shows this as longitudinal light and dark bands. That is a die and press-parameter issue.
3. Die lines and scratches. Microscopic wear on the die surface leaves fine longitudinal lines; invisible on bare metal, visible after anodizing.
4. Batch-to-batch variation. Two billet lots, two presses or two dies produce tone differences. Write into the order that profiles sharing one visible façade surface must come from the SAME BATCH — that is purchasing’s job, not the anodizer’s.
The right approach: for decorative work, run against an approved reference panel, order anodizing to a scheme such as Qualanod, and require at least 20-25 μm of film for exterior use.

We will bend the profile on site. We bought T6 and it is cracking. What should we do?​‌​​‌​

T6 is not bought to be bent — this is not a material defect, it is a temper selection error. The minimum elongation of 6060-T6 sits in the 6-8 % band, which is not enough for a tight-radius bend.
The right options, in order of preference:
1. Buy T4. Minimum elongation 16 %, proof stress only 60 N/mm². This is the most suitable condition in the family for bending. But T4 is not stable: natural ageing is largely complete in 5-8 days and the material hardens while it sits. Ask for fresh T4, ask for the production date, and bend as early as possible.
2. Buy T64. This is the underaged temper and it exists for exactly this problem. Single-source values: Rp0.2 ≥120 N/mm², Rm ≥180, A ≥12 % — that is twice the proof stress of T4 and twice the elongation of T6. But not every supplier stocks it — confirm before ordering.
3. Age after bending. A profile bent in T4 can afterwards be oven-aged toward something close to T6. The price: an extra furnace cycle, distortion risk, and material that sat a long time in T4 may not reach full peak strength.
And a sequencing warning: bend BEFORE powder coating. A typical powder-coat cure is 180-200 °C, squarely inside the artificial-ageing band — a T4 profile that has been through the coating line is no longer T4 and will not bend the way you expect.

Can we build a compressed-air receiver or a piping line out of this profile?​‌​​‌​

On the code side, no — and the reason is not that the material is weak but that it is OUT OF SCOPE.
ASME side: EN AW-6060 does not appear as a pressure-boundary material in ASME II Part D. That means there is no allowable stress to use in ASME Section VIII Div. 1; the vessel cannot be code-stamped. The same applies to ASME B31.3 process piping. The 6xxx alloys with ASME acceptance are 6061 and 6063 (via SB-209 plate and SB-221 extrusions).
European side: for pressure equipment under EN 13445 / PED, the material must rest on a harmonised material standard or an approved European Approval for Materials (EAM); it could not be verified in this research that such a route exists for 6060. Do not write an unverified acceptance into a quotation.
Two further technical reasons: the minimum proof stress of 6060 in T6 is about 140-150 N/mm² — uneconomical for a pressure vessel. And more importantly, if you weld the vessel, the HAZ drops the proof stress next to that bead toward 60 N/mm², and your design has to be made with that number.
Realistic answers: if a code is required, use 6061 or 6063; if structural strength is required, move to EN AW-6082; if the job is welded and corrosive, look at the 5xxx family (EN AW-5083). Using 6060 as a non-pressure housing, duct, cladding or non-load-bearing internal is entirely appropriate.

Common datasheet errors — check these before you order​‌​​‌​

1. Treating 6060 and 6063 as the same — THE MOST COMMON ERROR. Both carry the old name AlMgSi0.5, but EN 573-3 makes them two separate alloys with two separate sets of minima in EN 755-2 (T6 profile: 190 vs 215 N/mm²). Read the EN AW number on the certificate, not the DIN name.
2. Shifted chemistry columns. A widely mirrored datasheet prints “Cr 0.05-0.15 %, Ni 0.10 %” for 6060. That is a column shift: the real EN 573-3 row is Cr ≤0.05 % · Zn ≤0.15 % · Ti ≤0.10 %. Nickel is not a defined element in 6060 and chromium has no lower limit. Chromium is held at ≤0.05 % for anodizing clarity — 0.15 % chromium would destroy the reason 6060 exists.
3. Equating T5 with T6. T5 has no press quench, it has forced-air cooling. The values differ: T5 at ≤5 mm gives Rp0.2 ≥120 / Rm ≥160, T6 at the same thickness ≥150 / ≥190. A row written jointly as “T5/T6” must always be read with the T5 numbers.
4. Bar values printed for a profile. EN 755-2 gives Rm ≥190 for press-extruded round bar in T6 but Rm ≥170 for a thick-walled profile in T6. A number taken from the bar table is 12 % optimistic for a profile.
5. Cold drawn values printed for press-extruded product. EN 754-2 gives 215 / 160 / 10 % for drawn bar in T6; EN 755-2 gives 190 / 150 / 6 % for press-extruded bar. The difference comes from the production route, not the alloy.
6. The elongation definition is not stated. The same temper appears as 6 % on one sheet and 8 % on another. The most likely cause is confusion between A (5.65√S₀) and A₅₀mm. State which elongation definition is your acceptance criterion.
7. Inconsistent thickness break. Some sources put the T6 and T66 break at 3 mm, others at 5 mm. The break directly determines which minimum you are entitled to — confirm it in the relevant edition of EN 755-2.
8. Melting temperature given as a single number. 6060 is an alloy and has a melting range: one source gives 645-658 °C, another a solidus of 610 °C. The low figure is the non-equilibrium solidus and it is the one that governs hot forming and welding planning.
9. Three different electrical conductivity values in circulation. 54 % IACS, 34-38 MS/m and 28-34 MS/m all appear for the same alloy on different pages. Conductivity is temper sensitive (T6 > T4). For an electrical application, require a measured value on the certificate.
10. “High-strength aluminium” marketing. 6060 is among the lowest-strength members of the 6xxx family. Against the same standard, 6005A T6 gives 225 N/mm² and 6082 T6 260 N/mm² proof stress; 6060 T6 gives 140-150. Do not build a structural calculation on 6060.
11. ASME / pressure-vessel claims. 6060 is not in ASME II Part D. ASME acceptance on the 6xxx side is for 6061 and 6063. If you see “ASME compliant 6060” on a distributor page, do not price that line without verifying it.
12. The tolerance standard is omitted. The same 6060 profile can be sold to EN 755-9 or to EN 12020-2; EN 12020-2 is markedly tighter and more expensive. If a quotation does not state the tolerance class, the prices are not comparable.
13. Leaving “6060 is weldable” standing alone. It is true — but the strength the temper gave is lost in the HAZ. Measured joint efficiency on the sister alloy 6082-T6 is 76.6 %; a mill sheet for the same alloy states “approximately 50 % reduction” on the design side. Designing a welded 6xxx structure with the parent metal’s temper values is the most expensive mistake available.

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