Aluminum 1080A-O (Annealed)
Temper · default condition
AA 1080A · EN AW-1080A, 3.0285 · BS 1A
Pick for maximum ductility, deep drawing, spinning and highest reflectivity/conductivity.
Values for the O condition
Other 1080A tempers and conditions
1080A is listed in 11 conditions; see the grade overview at 1080A.
Compare all 11 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
ODefaultThis page Annealed | Pick for maximum ductility, deep drawing, spinning and highest reflectivity/conductivity. | 20 | 70 | 40 | 19 HB | 62 % IACS |
Slightly strain hardened | Use where near-O ductility is wanted but the product has been levelled/stretched after annealing. | 25 | 72 | 35 | 20 HB | 62 % IACS |
Strain hardened from hot working only | Standard condition for hot-rolled plate and extruded/hot-formed product of this grade. | 30 | 75 | 25 | 21 HB | 62 % IACS |
Strain hardened and partially annealed, quarter hard | Stabilised soft-side temper: H12-level strength but noticeably better ductility for forming. | 60 | 85 | 14 | 23 HB | 62 % IACS |
Strain hardened, quarter hard | Light cold work for slightly stiffer sheet that still bends and forms readily. | 70 | 85 | 12 | 24 HB | 61.5 % IACS |
Strain hardened and partially annealed, half hard | Best strength/bendability compromise for sheet that will still be roll-formed or hemmed. | 75 | 100 | 10 | 26 HB | 61.5 % IACS |
Strain hardened, half hard | The common general-purpose cold-rolled sheet temper: adequate stiffness with usable bend performance. | 85 | 100 | 8 | 27 HB | 61.5 % IACS |
Strain hardened and partially annealed, three-quarter hard | For stiff strip/panel with more residual ductility than H16 of the same strength level. | 90 | 115 | 7 | 30 HB | 61 % IACS |
Strain hardened, three-quarter hard | Choose for flat panels and strip needing higher stiffness with only mild bending. | 100 | 115 | 5 | 30 HB | 61 % IACS |
Strain hardened, full hard | Maximum strength temper — typical for hard foil, strip and flat springs where no forming follows. | 115 | 130 | 4 | 35 HB | 61 % IACS |
Strain hardened, extra hard | Extra-hard rolled foil condition when maximum as-rolled strength and flatness are required. | 130 | 145 | 3 | 38 HB | 61 % IACS |
What is 1080A-O?
1080A-O is 1080A in the O temper — pick for maximum ductility, deep drawing, spinning and highest reflectivity/conductivity. 1080A-O has a yield strength of 20 MPa (2.9 ksi) and a tensile strength of 70 MPa (10.2 ksi) — weaker than 100% of aluminum grades. Elongation at break is 40% and the elastic modulus is 69 GPa (10 Msi). 1080A-O has a density of 2.7 g/cm³ (0.0975 lb/in³), lighter than 59% of aluminum grades. It melts at 646°C (1,195 °F).
Advantages
- Forms and bends easily — 100/100, better than 100% of aluminum grades
- Polishes to a fine finish — 95/100, better than 100% of aluminum grades
- High electrical conductivity — 62 % IACS, better than 99% of aluminum grades
- Ductile — tolerates forming and impact — 40%, better than 98% of aluminum grades
- Conducts heat well — 231 W/m·K (133.5 BTU/hr·ft·°F), better than 97% of aluminum grades
Limitations
- Low strength — 20 MPa (2.9 ksi), worse than 100% of aluminum grades
- Difficult to machine — 20/100, worse than 99% of aluminum grades
1080A-O properties
Typical room-temperature values for 1080A-O; 12 are specific to this condition. Other listed values are 1080A reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
1080A-O has a density of 2.7 g/cm³ (0.0975 lb/in³), lighter than 59% of aluminum grades. It melts at 646°C (1,195 °F).
Mechanical11
1080A-O has a yield strength of 20 MPa (2.9 ksi) and a tensile strength of 70 MPa (10.2 ksi) — weaker than 100% of aluminum grades. Elongation at break is 40% and the elastic modulus is 69 GPa (10 Msi).
Thermal6
1080A-O is rated for continuous service to 200°C (392 °F). It conducts heat at 231 W/m·K (133.5 BTU/hr·ft·°F), better than 97% of aluminum grades. Thermal expansion is 23.5 µm/m·K (13.1 µin/in·°F).
Electrical3
1080A-O conducts electricity at 62 % IACS, better than 99% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is very good (80/100), better than 97% of aluminum grades.
Sustainability4
Producing a kilogram of 1080A-O takes about 215 MJ of energy and emits 13 kg of CO₂ — more than 93% of aluminum grades. Typical recycled content is 2%.
Manufacturability8
1080A-O's machinability is poor (20/100, worse than 99% of aluminum grades); weldability excellent (92/100); formability excellent (100/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1080A-O
Is 1080A easy to machine?
Very gummy — use polished high-rake carbide, high speed, sharp edges and generous lubricant/air blast to avoid built-up edge and smearing; harder H16/H18 tempers cut cleaner than O.
Can 1080A be welded?
Excellent with TIG/MIG using 1188 or 1100 filler; resistance and friction-stir welding also work, but the weld zone anneals back to O-temper strength.
Can 1080A be formed, bent or molded?
Outstanding cold formability — deep drawing, spinning, foil rolling and tight-radius bending in O/H1x2 tempers; expect strong work hardening and interstage annealing at 340–410 °C.
What surface finishes work on 1080A?
Bright dips and specular polishes to very high reflectivity; clear/bright anodizing gives water-clear films, and the soft substrate needs care to avoid handling scratches before coating.
1080A 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 |
|---|---|---|
| SiSi + Fe ≤ 0.20 for some producer specs | ≤ 0.15 | 0.06 |
| Fe | ≤ 0.15 | 0.08 |
| Cu | ≤ 0.03 | 0.01 |
| Mn | ≤ 0.02 | 0.01 |
| Mg | ≤ 0.02 | 0.01 |
| Zn | ≤ 0.06 | 0.01 |
| Tigrain refiner residual | ≤ 0.02 | 0.01 |
| Ga | ≤ 0.03 | 0.01 |
| V | ≤ 0.05 | 0.01 |
| Others (each)total per EN 573-3 | ≤ 0.02 | — |
| AlAl99.8(A) | ≥ 99.8 (balance) | — |
1080A-O — frequently asked
What is 1080A-O used for?
1080A-O is typically used for mirror-finish reflectors, chemical vessels, electronic foil and decorative anodizing. In short: highest formability in family; reflector-grade purity; cold-work strengthening only.
What is the yield strength of 1080A-O?
1080A-O has a typical yield strength of 20 MPa (2.9 ksi) and a tensile strength of 70 MPa (10.2 ksi) — weaker than 100% of aluminum grades. Strength varies by condition: see the 11 listed tempers.
Is 1080A-O easy to machine?
Not especially — machinability is rated poor (20/100, worse than 99% of aluminum grades). Very gummy — use polished high-rake carbide, high speed, sharp edges and generous lubricant/air blast to avoid built-up edge and smearing; harder H16/H18 tempers cut cleaner than O.
Can 1080A-O be welded?
Yes — weldability is rated excellent (92/100). Excellent with TIG/MIG using 1188 or 1100 filler; resistance and friction-stir welding also work, but the weld zone anneals back to O-temper strength.
What surface finishes work on 1080A-O?
Bright dips and specular polishes to very high reflectivity; clear/bright anodizing gives water-clear films, and the soft substrate needs care to avoid handling scratches before coating.
Can 1080A-O be formed, bent or molded?
Outstanding cold formability — deep drawing, spinning, foil rolling and tight-radius bending in O/H1x2 tempers; expect strong work hardening and interstage annealing at 340–410 °C.
What is the maximum service temperature of 1080A-O?
1080A-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 1080A-O and 1080A-H19?
O is the default condition — pick for maximum ductility, deep drawing, spinning and highest reflectivity/conductivity. H19: extra-hard rolled foil condition when maximum as-rolled strength and flatness are required. Yield strength is 20 MPa in O versus 130 MPa in H19.
Sources
- EN 573-3 Aluminium and aluminium alloys — Chemical composition of wrought products — CEN (2019)
- EN 485-2 Aluminium and aluminium alloys — Sheet, strip and plate: 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)
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.