Aluminum 5449
AA 5449 · UNS A95449
5449 (A95449, AlMg2Mn0.8(B)) is a low-magnesium, manganese-bearing Al-Mg automotive sheet alloy, non-heat-treatable and supplied in O, H111 and H22–H28 tempers.
Reference datasheet — 5449 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the O condition
5449 tempers and conditions
5449 is supplied in 6 conditions, soft to hard. O is the default FabDigit quotes; the values on this page are for it.
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 |
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?
5449 (A95449, AlMg2Mn0.8(B)) is a low-magnesium, manganese-bearing Al-Mg automotive sheet alloy, non-heat-treatable and supplied in O, H111 and H22–H28 tempers. It is chosen for exterior and structural body panels because a 95 formability rating and high n-value support deep drawing, stretch forming and hemming while 95 MPa yield, 210 MPa tensile and 24% elongation give useful dent resistance; weldability is rated 90. Machinability is low (32), joint and HAZ strength fall to near-O after welding, and service is limited to about 150 °C. 5182 is the usual alternative where higher panel strength is needed. 5449 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). 5449 has a yield strength of 95 MPa (13.8 ksi) and a tensile strength of 210 MPa (30.5 ksi) — weaker than 86% of aluminum grades. Elongation at break is 24% and the elastic modulus is 70 GPa (10.2 Msi).
What is 5449 used for?
- automotive body sheet
- structural inner panels
- formed brackets
Advantages
- Forms and bends easily — 95/100, better than 96% of aluminum grades
- Ductile — tolerates forming and impact — 24%, better than 92% of aluminum grades
- Readily welded — 90/100, better than 90% of aluminum grades
- Good corrosion resistance — 74/100, better than 87% of aluminum grades
Limitations
- Difficult to machine — 32/100, worse than 89% of aluminum grades
- Low strength — 95 MPa (13.8 ksi), worse than 86% of aluminum grades
5449 properties
Typical room-temperature values for 5449-O; bars are the position among aluminum grades.
Physical3
5449 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 has a yield strength of 95 MPa (13.8 ksi) and a tensile strength of 210 MPa (30.5 ksi) — weaker than 86% of aluminum grades. Elongation at break is 24% and the elastic modulus is 70 GPa (10.2 Msi).
Thermal6
5449 is rated for continuous service to 150°C (302 °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 conducts electricity at 34 % IACS, worse 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 5449 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's machinability is poor (32/100, worse than 89% of aluminum grades); weldability excellent (90/100); formability excellent (95/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the aluminum family
Yield strength against density for every aluminum grade FabDigit runs. 5449 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 5449
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.
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 |
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.
Surface treatments FabDigit runs on aluminum parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Organic Coating
Equivalent designations
Standards and trade names that resolve to Aluminum 5449 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- A95449
How much does 5449 cost?
5449 is a premium-cost aluminum ($$$), cheaper than about 51% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
5449 — frequently asked
What is 5449 used for?
5449 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?
5449 has a typical yield strength of 95 MPa (13.8 ksi) and a tensile strength of 210 MPa (30.5 ksi) — weaker than 86% of aluminum grades. Strength varies by condition: see the 6 listed tempers.
Is 5449 easy to machine?
Not especially — machinability is rated poor (32/100, worse than 89% 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 be welded?
Yes — weldability is rated excellent (90/100). 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?
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 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?
5449 is rated for continuous use to about 150°C (302 °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.
How much does 5449 cost?
5449 is a premium-cost aluminum ($$$), cheaper than about 51% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
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; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.