Aluminum 5082-H12
Temper
AA 5082 · EN AW-5082, AW 5082
H12 = strain hardened, quarter hard
Light cold work for modest strength gain with retained bending ability.
Values for the H12 condition
Other 5082 tempers and conditions
5082 is listed in 18 conditions; see the grade overview at 5082.
Compare all 18 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Pick for maximum formability in deep drawing and severe stretch forming. | 125 | 265 | 24 | 62 HB | 29.5 % IACS |
Strain hardened from hot working only | Hot-rolled thicker plate where only minimum properties, not a defined cold-work level, are required. | 135 | 275 | 16 | 65 HB | 29 % IACS |
Slightly strain hardened | Most commonly stocked plate/sheet condition: near-annealed formability with straight, flat product. | 140 | 275 | 20 | 66 HB | 29 % IACS |
Strain hardened and partially annealed, quarter hard | Quarter-hard strength with better ductility than H12 for formed parts. | 210 | 300 | 14 | 74 HB | 29 % IACS |
H12This page Strain hardened, quarter hard | Light cold work for modest strength gain with retained bending ability. | 215 | 300 | 12 | 75 HB | 29 % IACS |
Strain hardened and stabilized, quarter hard | Stabilized quarter-hard sheet — the standard choice when age-softening must be avoided. | 215 | 305 | 12 | 76 HB | 29 % IACS |
Strain hardened, corrosion-resistant marine temper | Choose for marine hull and superstructure plate requiring ASTM G66/G67 exfoliation performance. | 215 | 305 | 12 | 78 HB | 29 % IACS |
Strain hardened and stabilized, marine temper | Standard structural plate temper for tanks, marine and pressure applications needing stable properties and good IGC resistance. | 230 | 320 | 12 | 80 HB | 29 % IACS |
Strain hardened and partially annealed, half hard | Half-hard with recovered ductility for roll-formed and moderately drawn parts. | 250 | 330 | 10 | 84 HB | 29 % IACS |
Strain hardened and stabilized, half hard | Stabilized half-hard sheet for tank walls and panels needing higher strength than H32. | 255 | 335 | 9 | 86 HB | 29 % IACS |
Strain hardened, half hard | Half-hard strip for flat or lightly formed parts needing higher yield strength. | 260 | 330 | 9 | 85 HB | 29 % IACS |
Strain hardened and partially annealed, three-quarter hard | Three-quarter hard with slightly improved bendability over H16. | 285 | 355 | 7 | 91 HB | 29 % IACS |
Strain hardened, three-quarter hard | High-strength strip where forming is limited to gentle bends. | 290 | 360 | 6 | 92 HB | 29 % IACS |
Strain hardened and stabilized, three-quarter hard | Stabilized three-quarter hard for high-strength thin sheet/strip. | 290 | 360 | 6 | 93 HB | 29 % IACS |
Strain hardened, full hard | Fully cold-worked strip for maximum strength in flat blanks. | 340 | 390 | 4 | 100 HB | 29 % IACS |
Strain hardened and stabilized, full hard | Stabilized full-hard sheet where the highest non-heat-treatable strength is needed. | 345 | 395 | 4 | 102 HB | 29 % IACS |
Strain hardened, stabilized, extra hard | Extra-hard cold-rolled and low-temperature stabilized condition of Al-4.5Mg 5082, giving the highest strength of the H3x series with very limited ductility; typical of thin can-end / closure stock. | 370 | 400 | 4 | 108 HB | 29 % IACS |
Strain hardened, extra hard | Very heavily cold-rolled thin strip for beverage can ends and tabs. | 375 | 415 | 3 | 108 HB | 29 % IACS |
What is 5082-H12?
5082-H12 is 5082 in the H12 temper — light cold work for modest strength gain with retained bending ability. 5082-H12 has a yield strength of 215 MPa (31.2 ksi) and a tensile strength of 300 MPa (43.5 ksi) — stronger than 58% of aluminum grades. Elongation at break is 12% and the elastic modulus is 70 GPa (10.2 Msi). 5082-H12 has a density of 2.65 g/cm³ (0.0957 lb/in³), lighter than 90% of aluminum grades. It melts at 577°C (1,071 °F).
Advantages
- Good corrosion resistance — 72/100, better than 83% of aluminum grades
- Readily welded — 86/100, better than 82% of aluminum grades
- Forms and bends easily — 68/100, better than 81% of aluminum grades
- Tough — resists crack growth — 30 MPa·√m (27.3 ksi·√in), better than 76% of aluminum grades
Limitations
- Limited service temperature — 65°C (149 °F), worse than 97% of aluminum grades
- Poor heat conductor — 119 W/m·K (68.8 BTU/hr·ft·°F), worse than 81% of aluminum grades
- Low electrical conductivity — 29 % IACS, worse than 78% of aluminum grades
5082-H12 properties
Typical room-temperature values for 5082-H12; 22 are specific to this condition. Other listed values are 5082 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
5082-H12 has a density of 2.65 g/cm³ (0.0957 lb/in³), lighter than 90% of aluminum grades. It melts at 577°C (1,071 °F).
Mechanical11
5082-H12 has a yield strength of 215 MPa (31.2 ksi) and a tensile strength of 300 MPa (43.5 ksi) — stronger than 58% of aluminum grades. Elongation at break is 12% and the elastic modulus is 70 GPa (10.2 Msi).
Thermal6
5082-H12 is rated for continuous service to 65°C (149 °F). It conducts heat at 119 W/m·K (68.8 BTU/hr·ft·°F), worse than 81% of aluminum grades. Thermal expansion is 24.2 µm/m·K (13.4 µin/in·°F).
Electrical3
5082-H12 conducts electricity at 29 % IACS, worse than 78% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is very good (72/100), better than 83% of aluminum grades.
Sustainability4
Producing a kilogram of 5082-H12 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
5082-H12's machinability is fair (50/100, worse than 65% of aluminum grades); weldability excellent (86/100); formability good (68/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 5082-H12
Is 5082 easy to machine?
Gummy, long-chipping alloy — use sharp polished-flute carbide tools, high rake, high speed and flood coolant or MQL to prevent built-up edge; harder H3x tempers cut cleaner.
Can 5082 be welded?
Readily GMAW/GTAW welded with 5183 or 5356 filler; do not use 4000 series Si fillers (brittle Mg2Si), and keep interpass temperature low to limit sensitization.
Can 5082 be formed, bent or molded?
Excellent deep-drawing and stretch forming in O/H111; watch for Lüders (stretcher-strain) markings on annealed sheet — use temper-rolled or stabilized H2x/H3x for visible surfaces.
What surface finishes work on 5082?
Anodizes clear and bright and takes marine-grade sulphuric anodize well; brushed and painted finishes are common, flux brazing is not recommended due to the high Mg content.
5082 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 | ≤ 0.2 | 0.1 |
| Fe | ≤ 0.35 | 0.2 |
| Cu | ≤ 0.15 | 0.05 |
| Mnlower than 5182 | ≤ 0.15 | 0.08 |
| Mgprincipal strengthening element | 4 – 5 | 4.5 |
| Cr | ≤ 0.15 | 0.05 |
| Zn | ≤ 0.25 | 0.05 |
| Ti | ≤ 0.1 | 0.02 |
| Others (each) | ≤ 0.05 | — |
| Others (total) | ≤ 0.15 | — |
| Al | balance | — |
5082-H12 — frequently asked
What is 5082-H12 used for?
5082-H12 is typically used for deep-drawn can ends, tank trucks, pressure vessels, automotive body panels, storage tanks and marine hull and deck structures. In short: marine-grade plate alloy.
What is the yield strength of 5082-H12?
5082-H12 has a typical yield strength of 215 MPa (31.2 ksi) and a tensile strength of 300 MPa (43.5 ksi) — stronger than 58% of aluminum grades. Strength varies by condition: see the 18 listed tempers.
Is 5082-H12 easy to machine?
Reasonably — machinability is rated fair (50/100, worse than 65% of aluminum grades). Gummy, long-chipping alloy — use sharp polished-flute carbide tools, high rake, high speed and flood coolant or MQL to prevent built-up edge; harder H3x tempers cut cleaner.
Can 5082-H12 be welded?
Yes — weldability is rated excellent (86/100). Readily GMAW/GTAW welded with 5183 or 5356 filler; do not use 4000 series Si fillers (brittle Mg2Si), and keep interpass temperature low to limit sensitization.
What surface finishes work on 5082-H12?
Anodizes clear and bright and takes marine-grade sulphuric anodize well; brushed and painted finishes are common, flux brazing is not recommended due to the high Mg content.
Can 5082-H12 be formed, bent or molded?
Excellent deep-drawing and stretch forming in O/H111; watch for Lüders (stretcher-strain) markings on annealed sheet — use temper-rolled or stabilized H2x/H3x for visible surfaces.
What is the maximum service temperature of 5082-H12?
5082-H12 is rated for continuous use to about 65°C (149 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Can FabDigit make parts in 5082-H12?
Yes — 5082-H12 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 — CEN (2019)
- EN 485-2 Aluminium and aluminium alloys — Sheet, strip and plate — Mechanical properties — CEN (2016)
- ASM Handbook Vol. 2: Properties and Selection — Nonferrous Alloys — 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.