Aluminum 5025-H18
Temper
AA 5025 · EN AW-5025, AW 5025
H18 = strain hardened, full hard
Maximum strength strip/foil where no further forming beyond flat work is needed.
Values for the H18 condition
Other 5025 tempers and conditions
5025 is listed in 13 conditions; see the grade overview at 5025.
Compare all 13 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Pick for deep drawing, severe bending or spinning where maximum ductility is needed. | 65 | 165 | 24 | 40 HB | 50 % IACS |
Strain hardened and partially annealed, quarter hard | Softer, more ductile alternative to H12 obtained by back-annealing; better bend performance. | 145 | 185 | 11 | 48 HB | 49 % IACS |
Strain hardened and stabilized, quarter hard | The default stocked sheet/coil temper: stabilised against age-softening, good balance of strength, bending and weldability. | 155 | 195 | 10 | 55 HB | 49 % IACS |
Strain hardened, quarter hard | Light cold work for a modest strength gain while keeping most forming ability. | 165 | 190 | 9 | 50 HB | 49 % IACS |
Strain hardened and partially annealed, half hard | Common bending temper: half-hard strength with noticeably better formability than H14. | 165 | 205 | 9 | 56 HB | 49 % IACS |
Strain hardened and stabilized, half hard | Choose when panel stiffness/dent resistance matters more than tight bend radii. | 180 | 215 | 8 | 62 HB | 48 % IACS |
Strain hardened, half hard | General-purpose semi-hard sheet for mild forming plus useful stiffness of the panel. | 185 | 210 | 7 | 58 HB | 48.5 % IACS |
Strain hardened and partially annealed, three-quarter hard | Strength close to H16 but retained bendability for roll-formed profiles. | 185 | 225 | 6 | 62 HB | 48.5 % IACS |
Strain hardened and stabilized, three-quarter hard | Higher-strength stabilised strip for lightly formed brackets and stiffened panels. | 200 | 235 | 6 | 68 HB | 48 % IACS |
Strain hardened, three-quarter hard | Higher strength strip for flat parts, clips and roll-formed sections with generous bend radii. | 205 | 230 | 5 | 65 HB | 48 % IACS |
Strain hardened and partially annealed, full hard | Full-hard strip with a back-anneal to trim scatter; for flat blanked parts. | 215 | 245 | 4 | 70 HB | 48 % IACS |
Strain hardened and stabilized, full hard | Maximum stabilised strength; use for flat stamped/blanked parts with no tight bends. | 220 | 255 | 4 | 75 HB | 48 % IACS |
H18This page Strain hardened, full hard | Maximum strength strip/foil where no further forming beyond flat work is needed. | 230 | 250 | 4 | 72 HB | 48 % IACS |
What is 5025-H18?
5025-H18 is 5025 in the H18 temper — maximum strength strip/foil where no further forming beyond flat work is needed. 5025-H18 has a yield strength of 230 MPa (33.4 ksi) and a tensile strength of 250 MPa (36.3 ksi) — stronger than 60% of aluminum grades. Elongation at break is 4% and the elastic modulus is 69.5 GPa (10.1 Msi). 5025-H18 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
- High electrical conductivity — 48 % IACS, better than 88% of aluminum grades
- Conducts heat well — 184 W/m·K (106.3 BTU/hr·ft·°F), better than 87% of aluminum grades
- Polishes to a fine finish — 70/100, better than 87% of aluminum grades
- Good corrosion resistance — 71/100, better than 80% of aluminum grades
- Readily welded — 85/100, better than 79% of aluminum grades
Limitations
- Limited service temperature — 100°C (212 °F), worse than 91% of aluminum grades
5025-H18 properties
Typical room-temperature values for 5025-H18; 18 are specific to this condition. Other listed values are 5025 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
5025-H18 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-H18 has a yield strength of 230 MPa (33.4 ksi) and a tensile strength of 250 MPa (36.3 ksi) — stronger than 60% of aluminum grades. Elongation at break is 4% and the elastic modulus is 69.5 GPa (10.1 Msi).
Thermal6
5025-H18 is rated for continuous service to 100°C (212 °F). It conducts heat at 184 W/m·K (106.3 BTU/hr·ft·°F), better than 87% of aluminum grades. Thermal expansion is 23.8 µm/m·K (13.2 µin/in·°F).
Electrical3
5025-H18 conducts electricity at 48 % IACS, better than 88% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is very good (71/100), better than 80% of aluminum grades.
Sustainability4
Producing a kilogram of 5025-H18 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-H18's machinability is fair (45/100, worse than 72% of aluminum grades); weldability excellent (85/100); formability poor (30/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 5025-H18
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-H18 — frequently asked
What is 5025-H18 used for?
5025-H18 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-H18?
5025-H18 has a typical yield strength of 230 MPa (33.4 ksi) and a tensile strength of 250 MPa (36.3 ksi) — stronger than 60% of aluminum grades. Strength varies by condition: see the 13 listed tempers.
Is 5025-H18 easy to machine?
Reasonably — machinability is rated fair (45/100, worse than 72% 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-H18 be welded?
Yes — weldability is rated excellent (85/100). 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-H18?
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-H18 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-H18?
5025-H18 is rated for continuous use to about 100°C (212 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Can FabDigit make parts in 5025-H18?
Yes — 5025-H18 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
- 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.