Aluminum 5025 · temper
Aluminum 5025-O
Properties of the O condition, compared with the other 5025 tempers.
Pick for deep drawing, severe bending or spinning where maximum ductility is needed.
What is 5025-O?
5025-O is 5025 in the O temper — pick for deep drawing, severe bending or spinning where maximum ductility is needed. 5025-O has a yield strength of 65 MPa (9.43 ksi) and a tensile strength of 165 MPa (23.9 ksi) — weaker than 92% of aluminum grades. Elongation at break is 24% and the elastic modulus is 69.5 GPa (10.1 Msi). 5025-O has a density of 2.69 g/cm³ (0.0972 lb/in³), lighter than 67% of aluminum grades. It melts at 620°C (1,148 °F).
Advantages
- Forms and bends easily — 95/100, better than 96% of aluminum grades
- Ductile — tolerates forming and impact — 24%, better than 92% of aluminum grades
- High electrical conductivity — 50 % IACS, 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
- Polishes to a fine finish — 70/100, better than 87% of aluminum grades
Limitations
- Low strength — 65 MPa (9.43 ksi), worse than 92% of aluminum grades
- Difficult to machine — 30/100, worse than 91% of aluminum grades
5025-O properties
Typical room-temperature values for 5025-O — 11 properties are specific to this condition; the rest are grade-level values shared by every 5025 temper. Each bar shows where the value sits among the aluminum grades in FabDigit's library — further right is higher.
Physical3
5025-O has a density of 2.69 g/cm³ (0.0972 lb/in³), lighter than 67% of aluminum grades. It melts at 620°C (1,148 °F).
Mechanical10
5025-O has a yield strength of 65 MPa (9.43 ksi) and a tensile strength of 165 MPa (23.9 ksi) — weaker than 92% of aluminum grades. Elongation at break is 24% and the elastic modulus is 69.5 GPa (10.1 Msi).
Thermal6
5025-O is rated for continuous service to 150°C (302 °F). It conducts heat at 190 W/m·K (109.8 BTU/hr·ft·°F), better than 89% of aluminum grades. Thermal expansion is 23.8 µm/m·K (13.2 µin/in·°F).
Electrical3
5025-O conducts electricity at 50 % IACS, better than 90% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is very good (72/100), better than 83% of aluminum grades.
Sustainability4
Producing a kilogram of 5025-O takes about 200 MJ of energy and emits 12.5 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 35%.
Manufacturability7
5025-O's machinability is poor (30/100, worse than 91% of aluminum grades); weldability excellent (88/100); formability excellent (95/100).
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Other 5025 tempers and conditions
5025 is also supplied in 12 other conditions. The full side-by-side table is on the 5025 overview.
- H34Choose when panel stiffness/dent resistance matters more than tight bend radii.180 MPa yield · 62 HB
- H32The default stocked sheet/coil temper: stabilised against age-softening, good balance of strength, bending and weldability.155 MPa yield · 55 HB
- OPick for deep drawing, severe bending or spinning where maximum ductility is needed.65 MPa yield · 40 HB
Working with 5025-O
Is 5025 easy to machine?
Soft and gummy — use polished high-rake carbide, high surface speed, generous flood or MQL lubrication and chip-breaking geometry to avoid built-up edge.
Can 5025 be welded?
Readily GTAW/GMAW welded with 5356 (or 5183/5556 for higher strength) filler; the weld reverts to near-O properties, so design joints on annealed strength.
Can 5025 be formed, bent or molded?
Excellent cold formability in O/H22/H32; allow for springback in H3x tempers and inter-anneal at 340–380 °C for severe multi-stage draws.
What surface finishes work on 5025?
Anodises bright and uniformly, takes conversion coating and paint well; poor for brazing and only fair for soldering because of the magnesium oxide film.
5025 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 |
|---|---|---|
| Siimpurity limit; verify against current AA Teal Sheet registration | ≤ 0.25 | 0.1 |
| Feimpurity limit | ≤ 0.4 | 0.2 |
| Cu | ≤ 0.1 | 0.03 |
| Mngrain-structure control | 0.1 – 0.5 | 0.25 |
| Mgprincipal alloying element; below the ~3 % sensitisation threshold | 0.8 – 1.5 | 1.1 |
| Cr | ≤ 0.1 | — |
| Zn | ≤ 0.25 | — |
| Tigrain refiner | ≤ 0.1 | 0.02 |
| Others (each)total others 0.15 max | ≤ 0.05 | — |
| Al | balance | — |
5025-O — frequently asked
What is 5025-O used for?
5025-O is typically used for industrial sheet panels, rail car interior liners, formed enclosures and cabinet panels, welded sheet-metal fabrications, anodized trim and decorative sheet and panels for marine and outdoor exposure. In short: specialty industrial alloy.
What is the yield strength of 5025-O?
5025-O has a typical yield strength of 65 MPa (9.43 ksi) and a tensile strength of 165 MPa (23.9 ksi) — weaker than 92% of aluminum grades. Strength varies by condition: see the 13 listed tempers.
Is 5025-O easy to machine?
Not especially — machinability is rated poor (30/100, worse than 91% of aluminum grades). Soft and gummy — use polished high-rake carbide, high surface speed, generous flood or MQL lubrication and chip-breaking geometry to avoid built-up edge.
Can 5025-O be welded?
Yes — weldability is rated excellent (88/100). Readily GTAW/GMAW welded with 5356 (or 5183/5556 for higher strength) filler; the weld reverts to near-O properties, so design joints on annealed strength.
What surface finishes work on 5025-O?
Anodises bright and uniformly, takes conversion coating and paint well; poor for brazing and only fair for soldering because of the magnesium oxide film.
Can 5025-O be formed, bent or molded?
Excellent cold formability in O/H22/H32; allow for springback in H3x tempers and inter-anneal at 340–380 °C for severe multi-stage draws.
What is the maximum service temperature of 5025-O?
5025-O is rated for continuous use to about 150°C (302 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Can FabDigit make parts in 5025-O?
Yes — 5025-O is available for CNC machining and sheet metal with instant online pricing. Upload a STEP file to get a price and a DFM check.
Sources
- International Alloy Designations and Chemical Composition Limits for Wrought Aluminum (Teal Sheets) — The Aluminum Association (2018)
- EN 573-3 Aluminium and aluminium alloys — Chemical composition and form of wrought products — CEN (2019)
- EN 485-2 Aluminium and aluminium alloys — Sheet, strip and plate: mechanical properties — CEN (2016)
- ASTM B209 / B209M Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate — ASTM International (2021)
- 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.