Aluminum 6110A-O (Annealed)
Temper
AA 6110A · EN AW-6110A, AlMg0.9Si0.9MnCu
Softest condition for heavy cold forming or deep bending before re-heat-treatment.
Values for the O condition
Other 6110A tempers and conditions
6110A is listed in 9 conditions; see the grade overview at 6110A.
Compare all 9 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
OThis page Annealed | Softest condition for heavy cold forming or deep bending before re-heat-treatment. | 65 | 130 | 24 | 40 HB | 48 % IACS |
As fabricated | Mill condition for stock that will be solution treated or aged by the customer. | 110 | 200 | 18 | 55 HB | 43 % IACS |
Cooled from hot working and naturally aged | Press-quench-free stock with moderate strength; used when parts are formed then artificially aged. | 130 | 230 | 18 | 65 HB | 42 % IACS |
Solution heat treated and naturally aged | Pick for parts that must be bent, roll-formed or hydroformed and then paint-baked/aged to T6-like strength. | 155 | 260 | 20 | 75 HB | 37 % IACS |
Solution heat treated and overaged (stabilized) | Over-aged for dimensional stability and better resistance to intergranular attack in Cu-bearing 6000 series, at some strength loss. | 285 | 330 | 13 | 98 HB | 45 % IACS |
Solution heat treated and under-aged | Choose when high energy absorption / bendability is needed with most of the T6 strength (crash boxes). | 290 | 340 | 15 | 100 HB | 39 % IACS |
Cooled from hot working and artificially aged | Lowest-cost aged temper (press quench only) for thin structural profiles where T6 strength is not required. | 300 | 340 | 12 | 100 HB | 42 % IACS |
T6Default Solution heat treated and artificially aged | Default stocked condition: maximum strength for crash-management and load-bearing extrusions. | 355 | 385 | 11 | 115 HB | 40 % IACS |
T6 with improved mechanical properties | Controlled-aging temper giving the highest guaranteed strength for demanding extruded structures. | 370 | 400 | 10 | 120 HB | — |
What is 6110A-O?
6110A-O is 6110A in the O temper — softest condition for heavy cold forming or deep bending before re-heat-treatment. 6110A-O has a yield strength of 65 MPa (9.43 ksi) and a tensile strength of 130 MPa (18.9 ksi) — weaker than 92% of aluminum grades. Elongation at break is 24% and the elastic modulus is 70 GPa (10.2 Msi). 6110A-O has a density of 2.71 g/cm³ (0.0979 lb/in³), heavier than 51% of aluminum grades. It melts at 585°C (1,085 °F). T6 is the default condition FabDigit quotes; O is available on request or by drawing note.
Advantages
- Forms and bends easily — 90/100, better than 93% of aluminum grades
- Ductile — tolerates forming and impact — 24%, better than 92% of aluminum grades
- High service temperature — 200°C (392 °F), better than 90% of aluminum grades
- Conducts heat well — 190 W/m·K (109.8 BTU/hr·ft·°F), better than 89% of aluminum grades
- High electrical conductivity — 48 % IACS, better than 88% of aluminum grades
Limitations
- Low strength — 65 MPa (9.43 ksi), worse than 92% of aluminum grades
- Difficult to machine — 30/100, worse than 92% of aluminum grades
6110A-O properties
Typical room-temperature values for 6110A-O; 11 are specific to this condition. Other listed values are 6110A reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
6110A-O has a density of 2.71 g/cm³ (0.0979 lb/in³), heavier than 51% of aluminum grades. It melts at 585°C (1,085 °F).
Mechanical16
6110A-O has a yield strength of 65 MPa (9.43 ksi) and a tensile strength of 130 MPa (18.9 ksi) — weaker than 92% of aluminum grades. Elongation at break is 24% and the elastic modulus is 70 GPa (10.2 Msi).
Thermal6
6110A-O is rated for continuous service to 200°C (392 °F). It conducts heat at 190 W/m·K (109.8 BTU/hr·ft·°F), better than 89% of aluminum grades. Thermal expansion is 23.4 µm/m·K (13 µin/in·°F).
Electrical3
6110A-O conducts electricity at 48 % IACS, better than 88% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is good (55/100), worse than 51% of aluminum grades.
Sustainability4
Producing a kilogram of 6110A-O takes about 200 MJ of energy and emits 12.5 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 30%.
Manufacturability7
6110A-O's machinability is poor (30/100, worse than 92% of aluminum grades); weldability good (65/100); formability excellent (90/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 6110A-O
Is 6110A easy to machine?
Machines well in T5/T6 with polished carbide tools, high speed and copious coolant; T4/O tempers are gummy and prone to built-up edge.
Can 6110A be welded?
MIG/TIG weldable with 4043 (or 5356 for anodizing colour match); expect 40–50% HAZ strength loss and hot-crack risk from the Cu — post-weld T6 ageing restores much of the strength.
Can 6110A be formed, bent or molded?
Extrudes at moderate press speed (harder than 6063/6082); bend and hydroform in T4/W temper then artificially age — cold bending in T6 needs generous radii (≥3t).
What surface finishes work on 6110A?
Takes clear and hard anodising well but Cu/Mn intermetallics give a slightly darker, less uniform tint; chromate-free conversion coating or powder paint is preferred where chloride exposure occurs.
6110A 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 | 0.7 – 1.1 | 0.9 |
| Feimpurity limit | ≤ 0.5 | 0.25 |
| Curaises strength, lowers corrosion resistance | 0.2 – 0.7 | 0.45 |
| Mngrain/recrystallisation control | 0.2 – 0.7 | 0.45 |
| Mg | 0.5 – 1.1 | 0.9 |
| Cr | 0.04 – 0.25 | 0.12 |
| Zn | ≤ 0.3 | — |
| Ti | ≤ 0.15 | 0.02 |
| Others (each) | ≤ 0.05 | — |
| Others (total) | ≤ 0.15 | — |
| Al | balance | — |
6110A-O — frequently asked
What is 6110A-O used for?
6110A-O is typically used for high-strength structural extrusions, automotive bumper beams, vehicle seat and slide rails, chassis and subframe sections, crash management components and load-bearing transport profiles. In short: highest-strength 6000-series extrusion; cu-bearing, lower corrosion resistance; stronger than 6082-T6.
What is the yield strength of 6110A-O?
6110A-O has a typical yield strength of 65 MPa (9.43 ksi) and a tensile strength of 130 MPa (18.9 ksi) — weaker than 92% of aluminum grades. Strength varies by condition: see the 9 listed tempers.
Is 6110A-O easy to machine?
Not especially — machinability is rated poor (30/100, worse than 92% of aluminum grades). Machines well in T5/T6 with polished carbide tools, high speed and copious coolant; T4/O tempers are gummy and prone to built-up edge.
Can 6110A-O be welded?
Yes — weldability is rated good (65/100). MIG/TIG weldable with 4043 (or 5356 for anodizing colour match); expect 40–50% HAZ strength loss and hot-crack risk from the Cu — post-weld T6 ageing restores much of the strength.
What surface finishes work on 6110A-O?
Takes clear and hard anodising well but Cu/Mn intermetallics give a slightly darker, less uniform tint; chromate-free conversion coating or powder paint is preferred where chloride exposure occurs.
Can 6110A-O be formed, bent or molded?
Extrudes at moderate press speed (harder than 6063/6082); bend and hydroform in T4/W temper then artificially age — cold bending in T6 needs generous radii (≥3t).
What is the maximum service temperature of 6110A-O?
6110A-O is rated for continuous use to about 200°C (392 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 6110A-T6 and 6110A-O?
T6 is the default condition — default stocked condition: maximum strength for crash-management and load-bearing extrusions. O: softest condition for heavy cold forming or deep bending before re-heat-treatment. Yield strength is 355 MPa in T6 versus 65 MPa in O.
Sources
- EN 573-3 Aluminium and aluminium alloys — Chemical composition of wrought products — CEN (2019)
- EN 755-2 Aluminium and aluminium alloys — Extruded rod/bar, tube and profiles: mechanical properties — CEN (2016)
- International Alloy Designations and Chemical Composition Limits (Teal Sheets) — The Aluminum Association (2018)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol. 13B — Corrosion: Materials — ASM International (2005)
- High-strength 6000-series automotive extrusion alloy datasheets — Constellium / Hydro Extrusion (2022)
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.