Aluminum 5449-H22
Temper
AA 5449 · UNS A95449
H22 = strain hardened and partially annealed, quarter hard
Choose when moderate strength is needed but the part still requires bending and moderate drawing.
Values for the H22 condition
Other 5449 tempers and conditions
5449 is listed in 6 conditions; see the grade overview at 5449.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
ODefault Annealed | Pick for maximum drawability and stretch forming of complex body panels; skin-pass or temper-roll to avoid Lüders lines. | 95 | 210 | 24 | 55 HB | 34 % IACS |
Slightly strain hardened | Standard as-supplied condition for coil/plate that receives slight straightening or levelling after annealing; properties essentially O-level. | 100 | 215 | 22 | 58 HB | 34 % IACS |
H22This page Strain hardened and partially annealed, quarter hard | Choose when moderate strength is needed but the part still requires bending and moderate drawing. | 165 | 245 | 12 | 68 HB | 33 % IACS |
Strain hardened and partially annealed, half hard | Common structural/body-panel temper: good balance of dent resistance, bendability and strength. | 200 | 265 | 9 | 75 HB | 33 % IACS |
Strain hardened and partially annealed, three-quarter hard | Use where higher yield strength and stiffness-per-gauge matter more than forming, e.g. flat reinforcements and brackets. | 230 | 285 | 6 | 82 HB | 32 % IACS |
Strain hardened and partially annealed, full hard | Highest-strength strip temper for flat or lightly bent parts; forming is limited to gentle radii. | 260 | 305 | 4 | 88 HB | 32 % IACS |
What is 5449-H22?
5449-H22 is 5449 in the H22 temper — choose when moderate strength is needed but the part still requires bending and moderate drawing. 5449-H22 has a yield strength of 165 MPa (23.9 ksi) and a tensile strength of 245 MPa (35.5 ksi) — weaker than 58% of aluminum grades. Elongation at break is 12% and the elastic modulus is 70 GPa (10.2 Msi). 5449-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
- Good corrosion resistance — 74/100, better than 87% of aluminum grades
- Forms and bends easily — 78/100, better than 87% of aluminum grades
- Readily welded — 85/100, better than 79% of aluminum grades
Limitations
- Difficult to machine — 40/100, worse than 81% of aluminum grades
- Limited service temperature — 120°C (248 °F), worse than 79% of aluminum grades
5449-H22 properties
Typical room-temperature values for 5449-H22; 12 are specific to this condition. Other listed values are 5449 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
5449-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).
Mechanical10
5449-H22 has a yield strength of 165 MPa (23.9 ksi) and a tensile strength of 245 MPa (35.5 ksi) — weaker than 58% of aluminum grades. Elongation at break is 12% and the elastic modulus is 70 GPa (10.2 Msi).
Thermal6
5449-H22 is rated for continuous service to 120°C (248 °F). It conducts heat at 137 W/m·K (79.2 BTU/hr·ft·°F), worse than 57% of aluminum grades. Thermal expansion is 23.7 µm/m·K (13.2 µin/in·°F).
Electrical3
5449-H22 conducts electricity at 33 % IACS, worse than 57% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is very good (74/100), better than 87% of aluminum grades.
Sustainability4
Producing a kilogram of 5449-H22 takes about 200 MJ of energy and emits 12 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 35%.
Manufacturability8
5449-H22's machinability is fair (40/100, worse than 81% of aluminum grades); weldability excellent (85/100); formability very good (78/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 5449-H22
Is 5449 easy to machine?
Machines like other soft 5000-series sheet — use sharp polished high-rake carbide tools, high speed and flood lubrication to prevent built-up edge and burring.
Can 5449 be welded?
Readily GMAW/GTAW, resistance spot and laser welded with 5356 or 5183 filler; HAZ softens to near-O strength in H2x tempers.
Can 5449 be formed, bent or molded?
Excellent deep drawing, stretch forming and hemming in O/H111; the high n-value gives good strain distribution, but temper-roll or pre-strain to suppress Lüders bands and allow bake response.
What surface finishes work on 5449?
Takes clear and colour anodize well, and is a good substrate for conversion coating, e-coat and automotive paint systems; mechanical polish before anodizing for bright finishes.
5449 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 | ≤ 0.4 | 0.15 |
| Fe | ≤ 0.5 | 0.3 |
| Cu | ≤ 0.15 | 0.05 |
| Mndispersoid former, grain-size control | 0.6 – 1.1 | 0.8 |
| Mgprincipal solid-solution strengthener | 1.6 – 2.6 | 2 |
| Cr | ≤ 0.3 | 0.05 |
| Zn | ≤ 0.2 | 0.05 |
| Ti | ≤ 0.1 | 0.02 |
| Others (each) | ≤ 0.05 | — |
| Others (total) | ≤ 0.15 | — |
| Al | balance | — |
5449-H22 — frequently asked
What is 5449-H22 used for?
5449-H22 is typically used for automotive body sheet, structural inner panels and formed brackets. In short: formability-first automotive sheet; high n-value Al-Mg; good dent resistance.
What is the yield strength of 5449-H22?
5449-H22 has a typical yield strength of 165 MPa (23.9 ksi) and a tensile strength of 245 MPa (35.5 ksi) — weaker than 58% of aluminum grades. Strength varies by condition: see the 6 listed tempers.
Is 5449-H22 easy to machine?
Not especially — machinability is rated fair (40/100, worse than 81% of aluminum grades). Machines like other soft 5000-series sheet — use sharp polished high-rake carbide tools, high speed and flood lubrication to prevent built-up edge and burring.
Can 5449-H22 be welded?
Yes — weldability is rated excellent (85/100). Readily GMAW/GTAW, resistance spot and laser welded with 5356 or 5183 filler; HAZ softens to near-O strength in H2x tempers.
What surface finishes work on 5449-H22?
Takes clear and colour anodize well, and is a good substrate for conversion coating, e-coat and automotive paint systems; mechanical polish before anodizing for bright finishes.
Can 5449-H22 be formed, bent or molded?
Excellent deep drawing, stretch forming and hemming in O/H111; the high n-value gives good strain distribution, but temper-roll or pre-strain to suppress Lüders bands and allow bake response.
What is the maximum service temperature of 5449-H22?
5449-H22 is rated for continuous use to about 120°C (248 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 5449-O and 5449-H28?
O is the default condition — pick for maximum drawability and stretch forming of complex body panels; skin-pass or temper-roll to avoid Lüders lines. H28: highest-strength strip temper for flat or lightly bent parts; forming is limited to gentle radii. Yield strength is 95 MPa in O versus 260 MPa in H28.
Sources
- EN 485-2 Aluminium and aluminium alloys — Sheet, strip and plate — Mechanical properties — CEN (2016)
- EN 573-3 Chemical composition of wrought aluminium alloys — CEN (2019)
- 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 — ASM International (1990)
- ASM Handbook Vol.13B — Corrosion: Materials — 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.