Aluminum 5083
AA 5083 · UNS A95083 · EN AlMg4.5Mn, AlMg4.5Mn0.7 · JIS A5083, A5083P · GB 5A05, LF4
5083 is a non-heat-treatable Al–4.5Mg–0.7Mn wrought alloy that offers the highest strength of the common 5000-series alloys in the as-welded condition together with outstanding resistance to seawater and industrial atmospheres.
5083 tempers and conditions
5083 is supplied in 17 conditions, soft to hard.
Compare all 17 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Pick for maximum formability — deep drawing, tight bends, spinning — or where post-form welding will anneal the part anyway. | 145 | 290 | 23 | 65 HB | 29 % IACS |
As fabricated | As-fabricated hot-worked 5083 with no guaranteed mechanical limits; properties near annealed level and dependent on the forming route. | 145 | 290 | 18 | 72 HB | 29 % IACS |
Slightly strain hardened | Standard temper for 5083 extrusions and lightly worked sheet where near-annealed ductility is wanted with a small strength bonus. | 165 | 300 | 18 | 70 HB | 29 % IACS |
Strain hardened from hot working only | Choose for thick hot-rolled plate, forged stock and heavy extrusions where properties come from hot working rather than controlled cold work. | 165 | 300 | 16 | 72 HB | 29 % IACS |
Strain hardened and partially annealed, quarter hard | Over-worked then back-annealed to quarter-hard; quarter-hard strength with better ductility and more stable structure than H12. | 195 | 310 | 14 | 82 HB | 29 % IACS |
Strain hardened, quarter hard | Strain hardened only to quarter-hard; higher yield than O but unstabilized, so long-term exposure above ~65 °C risks sensitization and stress-corrosion cracking. | 200 | 315 | 12 | 85 HB | 29 % IACS |
Strain hardened and stabilized, quarter hard | Sheet/coil temper roughly interchangeable with H321 for non-immersion structural work such as trailers, tanks and bodywork. | 225 | 315 | 15 | 85 HB | 29 % IACS |
Strain hardened, corrosion-resistant marine temper | Default marine/LNG plate temper: qualified to ASTM B928 exfoliation (ASTM G66) and intergranular (G67) tests for continuous saltwater immersion. | 228 | 317 | 16 | 85 HB | 29 % IACS |
Strain hardened and stabilized, marine temper | Mechanically equivalent to H116 but produced by a stabilizing thermal treatment; specified by many shipyards and pressure-vessel codes (ASME). | 228 | 317 | 16 | 85 HB | 29 % IACS |
Strain hardened and partially annealed, half hard | Half-hard sheet produced by over-rolling and back-annealing; good balance of strength and bendability for formed marine and vehicle panels. | 250 | 337 | 10 | 88 HB | 29 % IACS |
Strain hardened, stabilized, stress-corrosion resistant | Sheet temper for formed parts needing higher strength than H321 with SCC-resistant processing (tanks, trailer panels). | 250 | 330 | 12 | 90 HB | 29 % IACS |
Strain hardened, half hard | Half-hard cold-rolled 5083 sheet: substantially higher yield strength with reduced ductility; unstabilized so not recommended for hot or long-term marine service. | 255 | 340 | 9 | 90 HB | 29 % IACS |
Strain hardened and stabilized, half hard | Half-hard sheet given a low-temperature stabilizing treatment; high yield strength with the sensitization resistance needed for high-Mg 5083. | 275 | 345 | 9 | 90 HB | 29 % IACS |
Strain hardened and partially annealed, three-quarter hard | Three-quarter-hard back-annealed sheet: near-maximum cold-worked strength for 5083 with slightly better ductility and stability than H16. | 285 | 358 | 8 | 93 HB | 29 % IACS |
Strain hardened, three-quarter hard | Three-quarter-hard cold-rolled 5083 with high strength and limited bend ductility; unstabilized high-Mg temper reserved for cold, dry-service applications. | 290 | 360 | 7 | 95 HB | 29 % IACS |
Strain hardened, stabilized, stress-corrosion resistant | Highest-strength standard 5083 sheet temper; used for hard-worked tank and body panels where bend radii can stay generous. | 300 | 360 | 10 | 100 HB | 29 % IACS |
Strain hardened and stabilized, three-quarter hard | Three-quarter-hard stabilized 5083 sheet: highest practical cold-worked strength while keeping the corrosion stability of the H3x series. | 305 | 365 | 7 | 96 HB | 29 % IACS |
What is 5083?
5083 is a non-heat-treatable Al–4.5Mg–0.7Mn wrought alloy that offers the highest strength of the common 5000-series alloys in the as-welded condition together with outstanding resistance to seawater and industrial atmospheres. It is the standard choice for ship hulls, LNG/cryogenic tanks, pressure vessels, tank trailers and armour-grade plate because weld strength approaches base-metal annealed strength and toughness stays high down to cryogenic temperatures. Its limits are a ~65 °C continuous service ceiling (Mg-rich β-phase sensitization leads to intergranular/exfoliation attack and stress corrosion), moderate machinability with gummy chip formation, and strength that cannot be restored by heat treatment after forming or welding. 5083 has a density of 2.66 g/cm³ (0.0961 lb/in³), lighter than 84% of aluminum grades. It melts at 574°C (1,065 °F). 5083 has a yield strength of 228 MPa (33.1 ksi) and a tensile strength of 317 MPa (46 ksi) — stronger than 60% of aluminum grades. Elongation at break is 16% and the elastic modulus is 71 GPa (10.3 Msi).
What is 5083 used for?
- Ship hulls and superstructures
- LNG and cryogenic storage tanks
- Welded pressure vessels
- Tank trailers and road tankers
- Armour-grade plate
- Marine deck fittings and hardware
- Railcar and vehicle body panels
Advantages
- Good corrosion resistance — 80/100, better than 97% of aluminum grades
- Tough — resists crack growth — 34 MPa·√m (30.9 ksi·√in), better than 90% of aluminum grades
- Readily welded — 90/100, better than 90% of aluminum grades
- Ductile — tolerates forming and impact — 16%, better than 84% of aluminum grades
Limitations
- Limited service temperature — 65°C (149 °F), worse than 97% of aluminum grades
- Poor heat conductor — 117 W/m·K (67.6 BTU/hr·ft·°F), worse than 83% of aluminum grades
- Low electrical conductivity — 29 % IACS, worse than 78% of aluminum grades
5083 properties
Typical room-temperature values; bars are the position among aluminum grades.
Physical3
5083 has a density of 2.66 g/cm³ (0.0961 lb/in³), lighter than 84% of aluminum grades. It melts at 574°C (1,065 °F).
Mechanical12
5083 has a yield strength of 228 MPa (33.1 ksi) and a tensile strength of 317 MPa (46 ksi) — stronger than 60% of aluminum grades. Elongation at break is 16% and the elastic modulus is 71 GPa (10.3 Msi).
Thermal6
5083 is rated for continuous service to 65°C (149 °F). It conducts heat at 117 W/m·K (67.6 BTU/hr·ft·°F), worse than 83% of aluminum grades. Thermal expansion is 23.8 µm/m·K (13.2 µin/in·°F).
Electrical3
5083 conducts electricity at 29 % IACS, worse than 78% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is very good (80/100), better than 97% of aluminum grades.
Sustainability4
Producing a kilogram of 5083 takes about 175 MJ of energy and emits 11.5 kg of CO₂ — less than 92% of aluminum grades. Typical recycled content is 30%.
Manufacturability8
5083's machinability is fair (50/100, worse than 65% of aluminum grades); weldability excellent (90/100); formability good (55/100).
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. 5083 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 5083
Is 5083 easy to machine?
Cuts easily but gummy — use sharp polished high-rake carbide, high surface speed, generous flood coolant or lubricant to avoid built-up edge; harder H32x/H34x tempers give cleaner chips than O.
Can 5083 be welded?
Excellent for GMAW/GTAW and friction stir with 5183 (highest strength) or 5356 filler; never use 4043 or 4000-series fillers (brittle Mg₂Si), keep interpass temperature low and avoid prolonged heating above 65 °C.
Can 5083 be formed, bent or molded?
Form in O or H111 for tight radii; H116/H321 plate bends well at generous radii but shows springback and Lüders/orange-peel markings — hot forming 200–250 °C is possible but re-sensitizes the alloy.
Manufacturability
The process limits FabDigit's quote engine applies to 5083. Design inside these and the part quotes instantly; outside them it routes to an engineer.
CNC machining
| Machinability | Better50 / 100 |
|---|---|
| ISO material group | N.1 |
| Cutting speed (rough / finish) | 350 / 420 m/min |
| Minimum wall | 0.5 mm |
| Minimum internal radius | 1 mm |
| Drill depth limit | 8× diameter |
| Best surface (machined / polished) | Ra 0.8 / — |
| Hardenable after machining | No |
Sheet metal
| Formability | Better55 / 100 |
|---|---|
| Weldability | Better90 / 100 |
| Bendable | Yes |
| Minimum bend radius | 0.5× thickness |
| Sheet thickness range | 1 – 12 mm |
| Spring-back | Low |
| Welding processes | MIG, TIG, SPOT, LASER |
5083 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 | ≤ 0.4 | 0.25 |
| Cu | ≤ 0.1 | 0.03 |
| Mngrain-structure control | 0.4 – 1 | 0.7 |
| Mgprimary strengthening element | 4 – 4.9 | 4.45 |
| Cr | 0.05 – 0.25 | 0.12 |
| Zn | ≤ 0.25 | 0.05 |
| Ti | ≤ 0.15 | 0.03 |
| Others (each)0.15 % total | ≤ 0.05 | |
| Alremainder, nominally ~94 % | balance |
What surface finishes work on 5083?
Takes clear and hard anodizing well and paints/powder-coats readily after chromate-free conversion coating; leave mill or brushed finish for marine work, and do not plate or braze.
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).
Passivation
Conversion Coating
PVD Coating
Equivalent designations
Standards and trade names that resolve to Aluminum 5083 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- A95083
- Aluminum Association
- AA5083
- EN / DIN / Werkstoff-Nr.
- AlMg4.5MnAlMg4.5Mn0.7AW-50833.3547
- GB (China)
- 5A05LF4
- JIS
- A5083A5083P
How much does 5083 cost?
5083 is a standard-cost aluminum ($$), cheaper than about 81% 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.
5083 — frequently asked
What is 5083 used for?
5083 is typically used for ship hulls and superstructures, LNG and cryogenic storage tanks, welded pressure vessels, tank trailers and road tankers, armour-grade plate and marine deck fittings and hardware. In short: tough marine alloy; impact resistant.
What is the yield strength of 5083?
5083 has a typical yield strength of 228 MPa (33.1 ksi) and a tensile strength of 317 MPa (46 ksi) — stronger than 60% of aluminum grades. Strength varies by condition: see the 17 listed tempers.
Is 5083 easy to machine?
Reasonably — machinability is rated fair (50/100, worse than 65% of aluminum grades). Cuts easily but gummy — use sharp polished high-rake carbide, high surface speed, generous flood coolant or lubricant to avoid built-up edge; harder H32x/H34x tempers give cleaner chips than O.
Can 5083 be welded?
Yes — weldability is rated excellent (90/100). Excellent for GMAW/GTAW and friction stir with 5183 (highest strength) or 5356 filler; never use 4043 or 4000-series fillers (brittle Mg₂Si), keep interpass temperature low and avoid prolonged heating above 65 °C.
What surface finishes work on 5083?
Takes clear and hard anodizing well and paints/powder-coats readily after chromate-free conversion coating; leave mill or brushed finish for marine work, and do not plate or braze.
Can 5083 be formed, bent or molded?
Form in O or H111 for tight radii; H116/H321 plate bends well at generous radii but shows springback and Lüders/orange-peel markings — hot forming 200–250 °C is possible but re-sensitizes the alloy.
What is the maximum service temperature of 5083?
5083 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.
How much does 5083 cost?
5083 is a standard-cost aluminum ($$), cheaper than about 81% 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.
Can FabDigit make parts in 5083?
Yes — 5083 is available for CNC machining and sheet metal with instant online pricing. Upload a STEP file to get a price and a DFM check.
Sources
- ASTM B209 — Aluminum and Aluminum-Alloy Sheet and Plate — ASTM International (2021)
- ASTM B928 — High Magnesium Aluminum-Alloy Sheet and Plate for Marine Service — ASTM International (2019)
- EN 485-2 / EN 573-3 (EN AW-5083, AlMg4.5Mn0.7) — CEN (2018)
- International Alloy Designations and Chemical Composition Limits (Teal Sheets) — The Aluminum Association (2018)
- ASM Handbook Vol. 2 — Properties of Nonferrous Alloys — ASM International (1990)
- MMPDS-16 (Metallic Materials Properties Development and Standardization) — Battelle/FAA (2021)
- Marine plate 5083 H116/H321 datasheets — Constellium / Alcoa (2023)
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.