Aluminum 5110A-O (Annealed)
Temper
AA 5110A
Pick for deep drawing, stretch forming, tight-radius bending or where maximum ductility and best anodized uniformity matter.
Values for the O condition
Other 5110A tempers and conditions
5110A is listed in 11 conditions; see the grade overview at 5110A.
Compare all 11 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
OThis page Annealed | Pick for deep drawing, stretch forming, tight-radius bending or where maximum ductility and best anodized uniformity matter. | 40 | 105 | 24 | 28 HB | 53 % IACS |
Slightly strain hardened | Mill-standard 'soft' coil condition where a small amount of straightening/levelling work is unavoidable; formability essentially as O. | 50 | 110 | 20 | 30 HB | 53 % IACS |
Strain hardened and partially annealed, quarter hard | Stabilized/partially annealed equivalent of H12 — slightly lower strength but noticeably better ductility and bendability. | 90 | 120 | 11 | 34 HB | 52 % IACS |
Strain hardened, quarter hard | Light cold work for flat panels that still need moderate bending; good compromise of stiffness in service and formability. | 105 | 125 | 9 | 36 HB | 52 % IACS |
Strain hardened and partially annealed, half hard | Most popular formable half-hard temper: H14-level strength with better elongation for bent brackets, trim and enclosures. | 110 | 135 | 8 | 39 HB | 52 % IACS |
H14Default Strain hardened, half hard | The default general-purpose stocked sheet temper: enough strength for panels and light structures while still bending to moderate radii. | 125 | 140 | 6 | 41 HB | 52 % IACS |
Strain hardened and partially annealed, three-quarter hard | Use when H16 strength is wanted but the part still has to survive moderate roll-forming or hemming. | 125 | 150 | 6 | 44 HB | 52 % IACS |
Strain hardened, three-quarter hard | Higher-strength flat sheet for stiff panels, roll-formed profiles and covers with only gentle bends. | 140 | 155 | 4 | 46 HB | 52 % IACS |
Strain hardened and partially annealed, full hard | Stabilized full-hard strip with a little more ductility than H18; ordered for flat blanked parts and springy strip. | 145 | 165 | 4 | 48 HB | 51 % IACS |
Strain hardened, full hard | Maximum cold-worked strength and springiness for flat parts, shims and strip; expect very limited bending. | 160 | 175 | 3 | 51 HB | 51 % IACS |
Strain hardened, extra hard | Special-order extra-hard strip/foil stock where peak as-rolled strength is required and no forming is done. | 175 | 190 | 2 | 54 HB | 52 % IACS |
What is 5110A-O?
5110A-O is 5110A in the O temper — pick for deep drawing, stretch forming, tight-radius bending or where maximum ductility and best anodized uniformity matter. 5110A-O has a yield strength of 40 MPa (5.8 ksi) and a tensile strength of 105 MPa (15.2 ksi) — weaker than 96% of aluminum grades. Elongation at break is 24% and the elastic modulus is 69 GPa (10 Msi). 5110A-O has a density of 2.69 g/cm³ (0.0972 lb/in³), lighter than 67% of aluminum grades. It melts at 632°C (1,170 °F). H14 is the default condition FabDigit quotes; O is available on request or by drawing note.
Advantages
- Forms and bends easily — 92/100, better than 94% of aluminum grades
- Polishes to a fine finish — 80/100, better than 93% of aluminum grades
- Ductile — tolerates forming and impact — 24%, better than 92% of aluminum grades
- Conducts heat well — 205 W/m·K (118.4 BTU/hr·ft·°F), better than 92% of aluminum grades
- High electrical conductivity — 53 % IACS, better than 92% of aluminum grades
Limitations
- Low strength — 40 MPa (5.8 ksi), worse than 96% of aluminum grades
- Difficult to machine — 28/100, worse than 94% of aluminum grades
5110A-O properties
Typical room-temperature values for 5110A-O; 16 are specific to this condition. Other listed values are 5110A reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
5110A-O has a density of 2.69 g/cm³ (0.0972 lb/in³), lighter than 67% of aluminum grades. It melts at 632°C (1,170 °F).
Mechanical10
5110A-O has a yield strength of 40 MPa (5.8 ksi) and a tensile strength of 105 MPa (15.2 ksi) — weaker than 96% of aluminum grades. Elongation at break is 24% and the elastic modulus is 69 GPa (10 Msi).
Thermal6
5110A-O is rated for continuous service to 200°C (392 °F). It conducts heat at 205 W/m·K (118.4 BTU/hr·ft·°F), better than 92% of aluminum grades. Thermal expansion is 23.7 µm/m·K (13.2 µin/in·°F).
Electrical3
5110A-O conducts electricity at 53 % IACS, better than 92% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is very good (74/100), better than 87% of aluminum grades.
Sustainability4
Producing a kilogram of 5110A-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
5110A-O's machinability is poor (28/100, worse than 94% of aluminum grades); weldability excellent (90/100); formability excellent (92/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 5110A-O
Is 5110A easy to machine?
Machines easily but gummily — use sharp polished high-rake carbide, high speed, generous lubrication and chip evacuation; the H1x/H2x tempers give cleaner chips than O.
Can 5110A be welded?
Readily GTAW/GMAW/resistance welded with 5356 or 4043 filler; the HAZ softens back toward O strength, so design joints for annealed properties.
Can 5110A be formed, bent or molded?
Excellent cold formability in O/H22/H24 (deep drawing, hemming, roll forming); minimum bend radii grow quickly in H16–H19, and interanneal at 340–410 °C if severe redrawing is needed.
What surface finishes work on 5110A?
Takes clear, bright and dyed anodizing very well due to low Mg/Si; also chromate/Ti-Zr conversion coats and powder paint. Polishes to a good specular finish; avoid alkaline cleaners that etch the surface.
5110A 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 |
|---|---|---|
| MgDefining addition — solid-solution strengthening, low enough to avoid sensitization | 0.35 – 0.7 | 0.5 |
| Simax; kept low for bright anodizing | ≤ 0.3 | 0.1 |
| Fe | ≤ 0.5 | 0.2 |
| Cumax; limited for corrosion resistance | ≤ 0.05 | 0.02 |
| Mn | ≤ 0.15 | 0.03 |
| Cr | ≤ 0.1 | — |
| Zn | ≤ 0.1 | — |
| Timax; grain refiner residue | ≤ 0.1 | 0.02 |
| Others (each)each | ≤ 0.05 | — |
| Others (total)total | ≤ 0.15 | — |
| AlRemainder, ≈99.0 % min | balance | — |
5110A-O — frequently asked
What is 5110A-O used for?
5110A-O is typically used for general sheet fabrication, light structural brackets and gussets, enclosures and chassis panels, anodized trim and decorative panels, roofing and cladding sheet and appliance and equipment panels. In short: best-anodizing 5000-series here; low-Mg formable sheet; high conductivity for 5000 series.
What is the yield strength of 5110A-O?
5110A-O has a typical yield strength of 40 MPa (5.8 ksi) and a tensile strength of 105 MPa (15.2 ksi) — weaker than 96% of aluminum grades. Strength varies by condition: see the 11 listed tempers.
Is 5110A-O easy to machine?
Not especially — machinability is rated poor (28/100, worse than 94% of aluminum grades). Machines easily but gummily — use sharp polished high-rake carbide, high speed, generous lubrication and chip evacuation; the H1x/H2x tempers give cleaner chips than O.
Can 5110A-O be welded?
Yes — weldability is rated excellent (90/100). Readily GTAW/GMAW/resistance welded with 5356 or 4043 filler; the HAZ softens back toward O strength, so design joints for annealed properties.
What surface finishes work on 5110A-O?
Takes clear, bright and dyed anodizing very well due to low Mg/Si; also chromate/Ti-Zr conversion coats and powder paint. Polishes to a good specular finish; avoid alkaline cleaners that etch the surface.
Can 5110A-O be formed, bent or molded?
Excellent cold formability in O/H22/H24 (deep drawing, hemming, roll forming); minimum bend radii grow quickly in H16–H19, and interanneal at 340–410 °C if severe redrawing is needed.
What is the maximum service temperature of 5110A-O?
5110A-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 5110A-H14 and 5110A-O?
H14 is the default condition — the default general-purpose stocked sheet temper: enough strength for panels and light structures while still bending to moderate radii. O: pick for deep drawing, stretch forming, tight-radius bending or where maximum ductility and best anodized uniformity matter. Yield strength is 125 MPa in H14 versus 40 MPa in O.
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 for Wrought Aluminum (Teal Sheets) — The Aluminum Association (2018)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
- ASM Handbook Vol. 13B — Corrosion: Materials (aluminium alloys) — 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.