Aluminum 6066-T4511
Temper
AA 6066 · UNS A96066 · EN AW-6066, AW 6066
T4511 = t4, stress relieved by stretching with minor straightening
Same as T4510 but minor straightening is permitted for tighter straightness tolerances on long extrusions.
Values for the T4511 condition
Other 6066 tempers and conditions
6066 is listed in 11 conditions; see the grade overview at 6066.
Compare all 11 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Softest condition for severe forming or machining of complex blanks before solution treating to T6. | 83 | 150 | 18 | 43 HB | 43 % IACS |
Solution heat treated and naturally aged by the user | Same metallurgy as T4 but heat treated by the fabricator after forming; slightly lower guaranteed properties. | 200 | 355 | 16 | 88 HB | 37 % IACS |
Solution heat treated and naturally aged | Medium-strength, more ductile condition for bending/forming of extrusions that will later be aged to T6 or used as-is. | 205 | 360 | 18 | 90 HB | 37 % IACS |
T4, stress relieved by stretching | T4 with a controlled stretch to relieve residual stress — pick for flat, low-distortion machining stock in the naturally aged condition. | 205 | 360 | 17 | 90 HB | 37 % IACS |
T4, stress relieved by stretching, no further straightening | Extruded T4 stress-relieved product supplied without post-stretch straightening; used where minor bow is acceptable. | 205 | 360 | 17 | 90 HB | 37 % IACS |
T4511This page T4, stress relieved by stretching with minor straightening | Same as T4510 but minor straightening is permitted for tighter straightness tolerances on long extrusions. | 205 | 360 | 17 | 90 HB | 37 % IACS |
T6, heat treated by the user | Re-heat-treated to T6-level strength after forming or welding by the fabricator, when incoming material was O/F/T4. | 350 | 390 | 11 | 118 HB | 40 % IACS |
Solution heat treated and artificially aged | Standard peak-strength condition for structural extrusions, forgings and machined hydraulic/mechanical parts needing more strength than 6061-T6. | 359 | 395 | 12 | 120 HB | 40 % IACS |
T6, stress relieved by stretching | T6 stress-relieved stock for precision machined parts where distortion after material removal must be minimised. | 359 | 395 | 12 | 120 HB | 40 % IACS |
T6, stress relieved by stretching, no further straightening | Most common stress-relieved extrusion temper for long T6 profiles machined all over. | 359 | 395 | 12 | 120 HB | 40 % IACS |
T6, stress relieved by stretching, minor straightening | T6510 with limited straightening allowed — choose for tight straightness on bar and complex profiles. | 359 | 395 | 12 | 120 HB | 40 % IACS |
What is 6066-T4511?
6066-T4511 is 6066 in the T4511 temper — same as T4510 but minor straightening is permitted for tighter straightness tolerances on long extrusions. 6066-T4511 has a yield strength of 205 MPa (29.7 ksi) and a tensile strength of 360 MPa (52.2 ksi) — stronger than 54% of aluminum grades. Elongation at break is 17% and the elastic modulus is 69 GPa (10 Msi). 6066-T4511 has a density of 2.72 g/cm³ (0.0983 lb/in³), heavier than 57% of aluminum grades. It melts at 563°C (1,045 °F).
Advantages
- Ductile — tolerates forming and impact — 17%, better than 85% of aluminum grades
Limitations
- Limited service temperature — 120°C (248 °F), worse than 79% of aluminum grades
6066-T4511 properties
Typical room-temperature values for 6066-T4511; 22 are specific to this condition. Other listed values are 6066 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
6066-T4511 has a density of 2.72 g/cm³ (0.0983 lb/in³), heavier than 57% of aluminum grades. It melts at 563°C (1,045 °F).
Mechanical11
6066-T4511 has a yield strength of 205 MPa (29.7 ksi) and a tensile strength of 360 MPa (52.2 ksi) — stronger than 54% of aluminum grades. Elongation at break is 17% and the elastic modulus is 69 GPa (10 Msi).
Thermal6
6066-T4511 is rated for continuous service to 120°C (248 °F). It conducts heat at 140 W/m·K (80.9 BTU/hr·ft·°F), worse than 52% of aluminum grades. Thermal expansion is 23.2 µm/m·K (12.9 µin/in·°F).
Electrical3
6066-T4511 conducts electricity at 37 % IACS, better than 58% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is fair (50/100), worse than 56% of aluminum grades.
Sustainability4
Producing a kilogram of 6066-T4511 takes about 200 MJ of energy and emits 12 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 30%.
Manufacturability6
6066-T4511's machinability is good (62/100, better than 55% of aluminum grades); weldability fair (40/100); formability fair (52/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 6066-T4511
Is 6066 easy to machine?
One of the better-machining 6000-series alloys thanks to Cu and Mn — sharp polished-flute carbide tools, high speed, chip-clearing coolant; T6/T651 gives cleaner chips than T4.
Can 6066 be welded?
Arc welding is discouraged (Cu-bearing, hot-crack and IGC prone); if required use 4043/4145 filler, low heat input and re-heat-treat plus age, expecting a weak HAZ.
Can 6066 be formed, bent or molded?
Extrudes and forges well at 400–480 °C but cold formability in T6 is poor — bend and cold-form in O or T4 and age afterwards.
What surface finishes work on 6066?
Takes hard sulfuric and chromic anodize well and paints/powder-coats readily; Cu makes clear/bright decorative anodize gray and blotchy, so specify architectural finish on 6061/6063 instead.
6066 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Si | 0.9 – 1.8 | 1.4 |
| Fe | ≤ 0.5 | — |
| Cu | 0.7 – 1.2 | 0.95 |
| Mn | 0.6 – 1.1 | 0.8 |
| Mg | 0.8 – 1.4 | 1.1 |
| Cr | ≤ 0.4 | — |
| Zn | ≤ 0.25 | — |
| Ti | ≤ 0.2 | — |
| Others (each)each | ≤ 0.05 | — |
| Others (total)total | ≤ 0.15 | — |
| Al | balance | — |
6066-T4511 — frequently asked
What is 6066-T4511 used for?
6066-T4511 is typically used for forged shafts, cycle rims, heavy extruded structural sections, high-strength machined brackets, forged suspension and linkage parts and hydraulic and pneumatic bodies. In short: high-strength forging alloy.
What is the yield strength of 6066-T4511?
6066-T4511 has a typical yield strength of 205 MPa (29.7 ksi) and a tensile strength of 360 MPa (52.2 ksi) — stronger than 54% of aluminum grades. Strength varies by condition: see the 11 listed tempers.
Is 6066-T4511 easy to machine?
Reasonably — machinability is rated good (62/100, better than 55% of aluminum grades). One of the better-machining 6000-series alloys thanks to Cu and Mn — sharp polished-flute carbide tools, high speed, chip-clearing coolant; T6/T651 gives cleaner chips than T4.
Can 6066-T4511 be welded?
With care — weldability is rated fair (40/100). Arc welding is discouraged (Cu-bearing, hot-crack and IGC prone); if required use 4043/4145 filler, low heat input and re-heat-treat plus age, expecting a weak HAZ.
What surface finishes work on 6066-T4511?
Takes hard sulfuric and chromic anodize well and paints/powder-coats readily; Cu makes clear/bright decorative anodize gray and blotchy, so specify architectural finish on 6061/6063 instead.
Can 6066-T4511 be formed, bent or molded?
Extrudes and forges well at 400–480 °C but cold formability in T6 is poor — bend and cold-form in O or T4 and age afterwards.
What is the maximum service temperature of 6066-T4511?
6066-T4511 is rated for continuous use to about 120°C (248 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Can FabDigit make parts in 6066-T4511?
Yes — 6066-T4511 is available for CNC machining and sheet metal; every part is priced by an engineer rather than instantly. Upload a STEP file to get a price and a DFM check.
Sources
- Aluminum Association International Alloy Designations and Chemical Composition Limits (Teal Sheets) — The Aluminum Association (2018)
- ASTM B221 — Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles and Tubes — ASTM International (2021)
- EN 573-3 / EN 755-2 — Wrought aluminium alloys, composition and extruded product properties — CEN (2019)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
- ASM Handbook Vol. 13B — Corrosion: Materials — ASM International (2005)
- Aluminum Standards and Data (typical mechanical & physical property tables) — The Aluminum Association (2017)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.