Aluminum 5051A-H22
Temper
AA 5051A · EN 3.3326
H22 = strain hardened and partially annealed, quarter hard
Same nominal strength class as H12 but with restored ductility for forming after delivery.
Values for the H22 condition
Other 5051A tempers and conditions
5051A is listed in 12 conditions; see the grade overview at 5051A.
Compare all 12 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
ODefault Annealed | Maximum formability for deep drawing, spinning and tight bends; lowest strength. | 68 | 175 | 24 | 45 HB | 35 % IACS |
Slightly strain hardened | Flat, levelled soft sheet where O-temper properties are needed but with better flatness. | 70 | 175 | 22 | 46 HB | 35 % IACS |
Strain hardened from hot working only | Standard condition for hot-rolled plate and extruded shapes; slightly above O in strength with guaranteed minima. | 75 | 180 | 20 | 47 HB | 34.5 % IACS |
As fabricated | Mill product supplied without mechanical property guarantees, for parts that will be formed and re-annealed. | 80 | 180 | 18 | 48 HB | 35 % IACS |
H22This page Strain hardened and partially annealed, quarter hard | Same nominal strength class as H12 but with restored ductility for forming after delivery. | 150 | 200 | 11 | 53 HB | 35 % IACS |
Strain hardened, quarter hard | Light cold work when a little more stiffness/dent resistance is needed but bending is still required. | 165 | 205 | 8 | 55 HB | 34.5 % IACS |
Strain hardened and partially annealed, half hard | Half-hard temper with better bendability than H14; the usual choice for formed half-hard parts. | 180 | 230 | 8 | 60 HB | 35 % IACS |
Strain hardened, half hard | General-purpose half-hard strip for panels, trim and light structures with moderate bending. | 195 | 235 | 6 | 62 HB | — |
Strain hardened and partially annealed, three-quarter hard | Three-quarter hard with a modest ductility reserve for gentle forming. | 205 | 250 | 5 | 65 HB | 35 % IACS |
Strain hardened, three-quarter hard | Higher-strength strip for flat or lightly formed parts such as covers and shells. | 220 | 255 | 4 | 68 HB | — |
Strain hardened and partially annealed, full hard | Full-hard strip stabilised by a low-temperature treatment for more consistent flatness and ductility. | 230 | 270 | 4 | 70 HB | 35 % IACS |
Strain hardened, full hard | Maximum cold-worked strength; flat parts only, essentially no bending capability. | 245 | 275 | 3 | 73 HB | 34 % IACS |
What is 5051A-H22?
5051A-H22 is 5051A in the H22 temper — same nominal strength class as H12 but with restored ductility for forming after delivery. 5051A-H22 has a yield strength of 150 MPa (21.8 ksi) and a tensile strength of 200 MPa (29 ksi) — weaker than 65% of aluminum grades. Elongation at break is 11% and the elastic modulus is 70 GPa (10.2 Msi). 5051A-H22 has a density of 2.68 g/cm³ (0.0968 lb/in³), lighter than 72% of aluminum grades. It melts at 610°C (1,130 °F). O is the default condition FabDigit quotes; H22 is available on request or by drawing note.
Advantages
- Polishes to a fine finish — 75/100, better than 90% of aluminum grades
- Good corrosion resistance — 74/100, better than 87% of aluminum grades
- Forms and bends easily — 75/100, better than 86% of aluminum grades
- Readily welded — 85/100, better than 79% of aluminum grades
Limitations
- Difficult to machine — 44/100, worse than 76% of aluminum grades
5051A-H22 properties
Typical room-temperature values for 5051A-H22; 20 are specific to this condition. Other listed values are 5051A reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
5051A-H22 has a density of 2.68 g/cm³ (0.0968 lb/in³), lighter than 72% of aluminum grades. It melts at 610°C (1,130 °F).
Mechanical11
5051A-H22 has a yield strength of 150 MPa (21.8 ksi) and a tensile strength of 200 MPa (29 ksi) — weaker than 65% of aluminum grades. Elongation at break is 11% and the elastic modulus is 70 GPa (10.2 Msi).
Thermal6
5051A-H22 is rated for continuous service to 130°C (266 °F). It conducts heat at 155 W/m·K (89.6 BTU/hr·ft·°F), better than 71% of aluminum grades. Thermal expansion is 23.7 µm/m·K (13.2 µin/in·°F).
Electrical3
5051A-H22 conducts electricity at 35 % IACS, better than 52% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is very good (74/100), better than 87% of aluminum grades.
Sustainability4
Producing a kilogram of 5051A-H22 takes about 200 MJ of energy and emits 12.5 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 35%.
Manufacturability8
5051A-H22's machinability is fair (44/100, worse than 76% of aluminum grades); weldability excellent (85/100); formability very good (75/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 5051A-H22
Is 5051A easy to machine?
Machinable with sharp polished-flute carbide tools, high rake and high speed plus flood or MQL coolant; annealed material is gummy and needs chip-breaking geometry.
Can 5051A be welded?
Excellent for GTAW/GMAW, resistance and friction-stir welding using 5356 or 5183 filler; welds return roughly to O-temper strength in the HAZ, so design joints on annealed properties.
Can 5051A be formed, bent or molded?
Very good cold formability in O/H1x-2x tempers — deep drawing, roll forming and tight bends; anneal 340–380 °C between severe operations and expect springback higher than for 1000/3000 series.
What surface finishes work on 5051A?
Takes clear, colour and bright anodising uniformly and gives a good mechanical/chemical polish; brazing is difficult and painting requires standard chromate-free pretreatment.
5051A 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 | ≤ 0.3 | 0.15 |
| Fe | ≤ 0.45 | 0.3 |
| Cu | ≤ 0.05 | 0.02 |
| Mn | ≤ 0.2 | 0.05 |
| Mgprincipal strengthening element | 1.7 – 2.2 | 1.95 |
| Cr | ≤ 0.1 | 0.03 |
| Zn | ≤ 0.2 | 0.03 |
| Tigrain refiner | ≤ 0.1 | 0.02 |
| Others (each) | ≤ 0.05 | — |
| Others (total) | ≤ 0.15 | — |
| Al | ≥ 97 (balance) | — |
5051A-H22 — frequently asked
What is 5051A-H22 used for?
5051A-H22 is typically used for general sheet fabrication, tube and pipe and decorative parts. In short: most formable 5000-series grade; between 5050 and 5052; bright anodizing grade.
What is the yield strength of 5051A-H22?
5051A-H22 has a typical yield strength of 150 MPa (21.8 ksi) and a tensile strength of 200 MPa (29 ksi) — weaker than 65% of aluminum grades. Strength varies by condition: see the 12 listed tempers.
Is 5051A-H22 easy to machine?
Not especially — machinability is rated fair (44/100, worse than 76% of aluminum grades). Machinable with sharp polished-flute carbide tools, high rake and high speed plus flood or MQL coolant; annealed material is gummy and needs chip-breaking geometry.
Can 5051A-H22 be welded?
Yes — weldability is rated excellent (85/100). Excellent for GTAW/GMAW, resistance and friction-stir welding using 5356 or 5183 filler; welds return roughly to O-temper strength in the HAZ, so design joints on annealed properties.
What surface finishes work on 5051A-H22?
Takes clear, colour and bright anodising uniformly and gives a good mechanical/chemical polish; brazing is difficult and painting requires standard chromate-free pretreatment.
Can 5051A-H22 be formed, bent or molded?
Very good cold formability in O/H1x-2x tempers — deep drawing, roll forming and tight bends; anneal 340–380 °C between severe operations and expect springback higher than for 1000/3000 series.
What is the maximum service temperature of 5051A-H22?
5051A-H22 is rated for continuous use to about 130°C (266 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 5051A-O and 5051A-H18?
O is the default condition — maximum formability for deep drawing, spinning and tight bends; lowest strength. H18: maximum cold-worked strength; flat parts only, essentially no bending capability. Yield strength is 68 MPa in O versus 245 MPa in H18.
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)
- DIN 1725 / W.-Nr. 3.3326 AlMg2 designation data — DIN (1986)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol. 13B — Corrosion: Materials (aluminium alloys) — ASM International (2005)
- European rolled AlMg2 strip datasheets (anodising quality) — Constellium / AMAG (2022)
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.