Aluminum 5021-H22
Temper
AA 5021 · UNS A95021
H22 = strain hardened and partially annealed, quarter hard
Pick strain-hardened and partially annealed quarter-hard sheet when a stable low strength of 165 MPa yield is wanted together with more stiffness than the annealed state.
Values for the H22 condition
Other 5021 tempers and conditions
5021 is listed in 13 conditions; see the grade overview at 5021.
Compare all 13 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Pick fully annealed blanks for deep drawing, complex formed body panels or any part needing maximum ductility, at 85 MPa yield strength and 25% elongation. | 85 | 190 | 25 | 47 HB | 36 % IACS |
H22This page Strain hardened and partially annealed, quarter hard | Pick strain-hardened and partially annealed quarter-hard sheet when a stable low strength of 165 MPa yield is wanted together with more stiffness than the annealed state. | 165 | 220 | 14 | 60 HB | 35 % IACS |
Strain hardened, quarter hard | Choose quarter-hard strain-hardened sheet when strength must sit slightly above the annealed state while bending remains good, at 180 MPa yield and 12% elongation. | 180 | 225 | 12 | 62 HB | 35 % IACS |
Strain hardened and stabilized, quarter hard | Use quarter-hard sheet that is strain hardened and low-temperature stabilized when long-term property stability without age softening is required, at 185 MPa yield. | 185 | 230 | 13 | 62 HB | 35 % IACS |
Strain hardened and partially annealed, half hard | Choose strain-hardened and partially annealed half-hard sheet for parts needing secondary forming; bendability exceeds H14 at 195 MPa yield and 11% elongation. | 195 | 245 | 11 | 68 HB | 35 % IACS |
Strain hardened, half hard | Use half-hard strain-hardened sheet as the general-purpose cold-worked compromise between strength (210 MPa yield) and bendability at 9% elongation. | 210 | 250 | 9 | 70 HB | 35 % IACS |
Strain hardened and stabilized, half hard | Pick the general-purpose stabilized half-hard sheet for a balance of 210 MPa yield strength, 10% elongation and dimensional stability in service. | 210 | 255 | 10 | 71 HB | 35 % IACS |
Strain hardened and stabilized, three-quarter hard | Choose the stabilized three-quarter-hard sheet for dent-resistant panels and shallow-formed parts at 238 MPa yield, accepting only 7% elongation. | 238 | 278 | 7 | 79 HB | 35 % IACS |
Strain hardened, three-quarter hard | Pick three-quarter-hard strain-hardened sheet for panels and housings where dent resistance comes first and only light forming is required; elongation drops to 6%. | 240 | 275 | 6 | 78 HB | 35 % IACS |
Strain hardened and stabilized, full hard | Use the stabilized full-hard condition for finished can ends and panels: strength approaches H18 at 260 MPa yield, with better elongation and long-term stability. | 260 | 295 | 5 | 83 HB | — |
H18Default Strain hardened, full hard | Choose the most widely stocked full-hard strain-hardened sheet and strip for can ends, tab stock and thin dent-resistant walls: 270 MPa yield with only 4% elongation. | 270 | 300 | 4 | 85 HB | 35 % IACS |
Strain hardened and stabilized, extra hard | Pick this strain-hardened and stabilized extra-hard strip for thin-gauge can ends and pull tabs needing the maximum 285 MPa yield; 4% elongation leaves essentially no forming reserve. | 285 | 315 | 4 | 90 HB | — |
Strain hardened, extra hard | Use the strongest cold-rolled condition at 295 MPa yield for can-end and tab strip that needs only localized forming; ductility falls to 3% elongation. | 295 | 320 | 3 | 92 HB | — |
What is 5021-H22?
5021-H22 is 5021 in the H22 temper — pick strain-hardened and partially annealed quarter-hard sheet when a stable low strength of 165 MPa yield is wanted together with more stiffness than the annealed state. 5021-H22 has a yield strength of 165 MPa (23.9 ksi) and a tensile strength of 220 MPa (31.9 ksi) — weaker than 58% of aluminum grades. Elongation at break is 14% and the elastic modulus is 70 GPa (10.2 Msi). 5021-H22 has a density of 2.68 g/cm³ (0.0968 lb/in³), lighter than 72% of aluminum grades. It melts at 607°C (1,125 °F). H18 is the default condition FabDigit quotes; H22 is available on request or by drawing note.
Advantages
- Good corrosion resistance — 79/100, better than 96% of aluminum grades
- Polishes to a fine finish — 65/100, better than 82% of aluminum grades
- Ductile — tolerates forming and impact — 14%, better than 81% of aluminum grades
- Forms and bends easily — 66/100, better than 81% of aluminum grades
Limitations
- Limited service temperature — 110°C (230 °F), worse than 89% of aluminum grades
- Difficult to machine — 37/100, worse than 84% of aluminum grades
5021-H22 properties
Typical room-temperature values for 5021-H22; 21 are specific to this condition. Other listed values are 5021 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
5021-H22 has a density of 2.68 g/cm³ (0.0968 lb/in³), lighter than 72% of aluminum grades. It melts at 607°C (1,125 °F).
Mechanical11
5021-H22 has a yield strength of 165 MPa (23.9 ksi) and a tensile strength of 220 MPa (31.9 ksi) — weaker than 58% of aluminum grades. Elongation at break is 14% and the elastic modulus is 70 GPa (10.2 Msi).
Thermal6
5021-H22 is rated for continuous service to 110°C (230 °F). It conducts heat at 138 W/m·K (79.7 BTU/hr·ft·°F), worse than 55% of aluminum grades. Thermal expansion is 23.8 µm/m·K (13.2 µin/in·°F).
Electrical3
5021-H22 conducts electricity at 35 % IACS, better than 52% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is very good (79/100), better than 96% of aluminum grades.
Sustainability4
Producing a kilogram of 5021-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
5021-H22's machinability is fair (37/100, worse than 84% of aluminum grades); weldability very good (78/100); formability good (66/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 5021-H22
Is 5021 easy to machine?
Soft and prone to sticking to the cutting edge: use sharp, polished, high-rake tools, high spindle speed and generous emulsion or alcohol-based lubricant. Cold-worked H18/H19 material breaks chips better than O temper.
Can 5021 be welded?
TIG and MIG with 5356 or 5183 filler wire and resistance spot welding are all usable. The weld zone anneals and softens, so joint strength approaches O-temper values and no heat treatment restores it.
Can 5021 be formed, bent or molded?
O and H2x tempers give good deep-drawing behaviour; H18, H19 and H39 are limited to shallow forming, hemming/curling and blanking. Bend on large radii and with the rolling direction, and watch for Lüders (stretcher-strain) marks.
What surface finishes work on 5021?
Anodizing, chemical conversion coating (chrome-free paint pretreatment) and pre-painted coil coatings all apply. Adhesion is good after surface cleaning, which suits automotive topcoats and can-end interior lacquers.
5021 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 |
|---|---|---|
| Mgsolid-solution strengthener; auto/packaging range per AA Teal Sheets | 2 – 3 | 2.5 |
| Mnrefines grain, increases strength | 0.1 – 0.5 | 0.3 |
| Si | ≤ 0.4 | 0.15 |
| Fe | ≤ 0.5 | 0.3 |
| Cu | ≤ 0.15 | 0.05 |
| Cr | ≤ 0.15 | 0.05 |
| Zn | ≤ 0.25 | 0.05 |
| Tigrain refiner | ≤ 0.15 | 0.02 |
| Others (each)each other impurity | ≤ 0.05 | — |
| Others (total)total other impurities | ≤ 0.15 | — |
| Al | balance | — |
5021-H22 — frequently asked
What is 5021-H22 used for?
5021-H22 is typically used for automotive body panels, closures and structural sheet. In short: dent-resistant auto body sheet; hard-temper 5000-series panel stock; formable and weldable.
What is the yield strength of 5021-H22?
5021-H22 has a typical yield strength of 165 MPa (23.9 ksi) and a tensile strength of 220 MPa (31.9 ksi) — weaker than 58% of aluminum grades. Strength varies by condition: see the 13 listed tempers.
Is 5021-H22 easy to machine?
Not especially — machinability is rated fair (37/100, worse than 84% of aluminum grades). Soft and prone to sticking to the cutting edge: use sharp, polished, high-rake tools, high spindle speed and generous emulsion or alcohol-based lubricant. Cold-worked H18/H19 material breaks chips better than O temper.
Can 5021-H22 be welded?
Yes — weldability is rated very good (78/100). TIG and MIG with 5356 or 5183 filler wire and resistance spot welding are all usable. The weld zone anneals and softens, so joint strength approaches O-temper values and no heat treatment restores it.
What surface finishes work on 5021-H22?
Anodizing, chemical conversion coating (chrome-free paint pretreatment) and pre-painted coil coatings all apply. Adhesion is good after surface cleaning, which suits automotive topcoats and can-end interior lacquers.
Can 5021-H22 be formed, bent or molded?
O and H2x tempers give good deep-drawing behaviour; H18, H19 and H39 are limited to shallow forming, hemming/curling and blanking. Bend on large radii and with the rolling direction, and watch for Lüders (stretcher-strain) marks.
What is the maximum service temperature of 5021-H22?
5021-H22 is rated for continuous use to about 110°C (230 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 5021-H18 and 5021-O?
H18 is the default condition — choose the most widely stocked full-hard strain-hardened sheet and strip for can ends, tab stock and thin dent-resistant walls: 270 MPa yield with only 4% elongation. O: pick fully annealed blanks for deep drawing, complex formed body panels or any part needing maximum ductility, at 85 MPa yield strength and 25% elongation. Yield strength is 270 MPa in H18 versus 85 MPa in O.
Sources
- 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 — ASM International (2005)
- ASTM B209 / B209M — Aluminum and Aluminum-Alloy Sheet and Plate — ASTM International (2021)
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.