Aluminum 5383
AA 5383 · UNS A95383 · EN AW-5383, AW 5383
5383 is an Al-Mg-Mn(Zr) marine alloy optimized from 5083, using higher manganese, a trace zirconium addition and tight control of Si, Fe and Cu so that H116/H321 parent metal and welded joints are stronger than 5083 while keeping exfoliation and intergranular corrosion resistance (passes ASTM G66/G67).
5383 tempers and conditions
5383 is supplied in 9 conditions, soft to hard.
Compare all 9 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Pick for maximum formability in deep-drawn or heavily bent marine parts; lowest strength. | 150 | 300 | 20 | 72 HB | 29 % IACS |
Slightly strain hardened | Common for extrusions and lightly worked sheet needing good forming with slightly higher strength than O. | 175 | 310 | 17 | 78 HB | 29 % IACS |
Strain hardened from hot working only | Standard temper for hot-rolled heavy plate and extruded profiles where mechanical minima but no exfoliation test are required. | 200 | 315 | 13 | 85 HB | 29 % IACS |
Strain hardened and stabilized, quarter hard | Sheet temper for formed marine components needing a balance of strength and bendability. | 215 | 325 | 12 | 92 HB | 29 % IACS |
Strain hardened, corrosion-resistant marine temper | Default marine plate/sheet temper: highest guaranteed strength with ASTM G66/G67 exfoliation and IGC acceptance for hull and superstructure. | 220 | 330 | 13 | 95 HB | — |
Strain hardened and stabilized, marine temper | Alternative marine temper to H116 with a thermal stabilization step; specified where class rules or welding practice call for H321. | 222 | 330 | 13 | 95 HB | 29 % IACS |
Strain hardened and partially annealed, quarter hard | Quarter-hard, stabilized 5383 marine sheet — moderate strength with good forming ability and full seawater corrosion resistance. | 235 | 325 | 12 | 82 HB | 29 % IACS |
Strain hardened and stabilized, half hard | Choose for thin sheet needing higher strength and stiffness in panels with only mild forming. | 265 | 355 | 8 | 105 HB | 29 % IACS |
Strain hardened and partially annealed, half hard | Half-hard, stabilized 5383 sheet — higher strength than H22 with reduced ductility, used for marine and transport panels. | 285 | 360 | 9 | 92 HB | 29 % IACS |
What is 5383?
5383 is an Al-Mg-Mn(Zr) marine alloy optimized from 5083, using higher manganese, a trace zirconium addition and tight control of Si, Fe and Cu so that H116/H321 parent metal and welded joints are stronger than 5083 while keeping exfoliation and intergranular corrosion resistance (passes ASTM G66/G67). It is supplied as plate, sheet and extrusions for fast ferry and yacht hulls, ship superstructure, LNG/cryogenic structure and offshore platforms. It is not heat-treatable, service should stay below about 65 °C to avoid β-phase sensitization, machinability is average and it is unsuitable for bright decorative anodizing; 5083 is the nearest substitute. 5383 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). 5383 has a yield strength of 220 MPa (31.9 ksi) and a tensile strength of 330 MPa (47.9 ksi) — stronger than 59% of aluminum grades. Elongation at break is 13% and the elastic modulus is 71 GPa (10.3 Msi).
What is 5383 used for?
- Fast ferry hulls
- High-speed yacht hulls
- Ship superstructure panels
- LNG and cryogenic structural plate
- Offshore platform decks and modules
- Patrol and workboat hulls
- Welded marine extrusions
Advantages
- Good corrosion resistance — 80/100, better than 97% of aluminum grades
- Readily welded — 88/100, better than 85% of aluminum grades
- Ductile — tolerates forming and impact — 13%, better than 79% of aluminum grades
- Tough — resists crack growth — 30 MPa·√m (27.3 ksi·√in), better than 76% 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
5383 properties
Typical room-temperature values; bars are the position among aluminum grades.
Physical3
5383 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
5383 has a yield strength of 220 MPa (31.9 ksi) and a tensile strength of 330 MPa (47.9 ksi) — stronger than 59% of aluminum grades. Elongation at break is 13% and the elastic modulus is 71 GPa (10.3 Msi).
Thermal6
5383 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 24.2 µm/m·K (13.4 µin/in·°F).
Electrical3
5383 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 5383 takes about 205 MJ of energy and emits 12.5 kg of CO₂ — more than 76% of aluminum grades. Typical recycled content is 35%.
Manufacturability8
5383's machinability is fair (45/100, worse than 72% of aluminum grades); weldability excellent (88/100); 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. 5383 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 5383
Is 5383 easy to machine?
Gummy, long stringy chips — use sharp polished high-rake carbide, high speed, generous flood or MQL lubricant; expect built-up edge if speeds are low.
Can 5383 be welded?
Excellent for MIG/TIG (ER5183 preferred, ER5356 acceptable) and FSW; HAZ softens to near-O strength, so design joints to annealed-temper allowables and keep interpass temperature low.
Can 5383 be formed, bent or molded?
Good cold formability in O/H111; H116/H321 plate needs generous bend radii (≈2–3 t) and transverse bending is preferred over longitudinal.
Manufacturability
The process limits FabDigit applies to 5383. Every 5383 part is priced by an engineer; design inside these and the quote comes back without a redesign loop.
CNC machining
| Machinability | Better45 / 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 | Better88 / 100 |
| Bendable | Yes |
5383 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 | ≤ 0.25 | 0.1 |
| Fe | ≤ 0.25 | 0.15 |
| Cu | ≤ 0.2 | 0.05 |
| Mn | 0.7 – 1 | 0.85 |
| Mg | 4 – 5.2 | 4.7 |
| Cr | ≤ 0.25 | 0.1 |
| Zn | ≤ 0.4 | 0.2 |
| Ti | ≤ 0.15 | 0.03 |
| Zrgrain-structure control, key difference vs 5083 | ≤ 0.2 | 0.12 |
| Others (each) | ≤ 0.05 | |
| Others (total) | ≤ 0.15 | |
| Al | balance |
What surface finishes work on 5383?
Takes protective clear/hard anodizing and marine epoxy primers well; decorative bright anodize is only fair, and chromate-free conversion coatings are standard for painted hull structures.
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 5383 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- A95383
- Aluminum Association
- AA5383
- EN / DIN / Werkstoff-Nr.
- AW-5383AW 5383AlMg4.5Mn0.9
How much does 5383 cost?
5383 is a standard-cost aluminum ($$), cheaper than about 62% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
5383 — frequently asked
What is 5383 used for?
5383 is typically used for fast ferry hulls, high-speed yacht hulls, ship superstructure panels, LNG and cryogenic structural plate, offshore platform decks and modules and patrol and workboat hulls. In short: improved corrosion 5083.
What is the yield strength of 5383?
5383 has a typical yield strength of 220 MPa (31.9 ksi) and a tensile strength of 330 MPa (47.9 ksi) — stronger than 59% of aluminum grades. Strength varies by condition: see the 9 listed tempers.
Is 5383 easy to machine?
Reasonably — machinability is rated fair (45/100, worse than 72% of aluminum grades). Gummy, long stringy chips — use sharp polished high-rake carbide, high speed, generous flood or MQL lubricant; expect built-up edge if speeds are low.
Can 5383 be welded?
Yes — weldability is rated excellent (88/100). Excellent for MIG/TIG (ER5183 preferred, ER5356 acceptable) and FSW; HAZ softens to near-O strength, so design joints to annealed-temper allowables and keep interpass temperature low.
What surface finishes work on 5383?
Takes protective clear/hard anodizing and marine epoxy primers well; decorative bright anodize is only fair, and chromate-free conversion coatings are standard for painted hull structures.
Can 5383 be formed, bent or molded?
Good cold formability in O/H111; H116/H321 plate needs generous bend radii (≈2–3 t) and transverse bending is preferred over longitudinal.
What is the maximum service temperature of 5383?
5383 is rated for continuous use to about 65°C (149 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does 5383 cost?
5383 is a standard-cost aluminum ($$), cheaper than about 62% 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 5383?
Yes — 5383 is available for CNC machining and sheet metal; every part is priced by an engineer rather than instantly. Upload a STEP file to get a price and a DFM check.
Sources
- International Alloy Designations and Chemical Composition Limits for Wrought Aluminum (Teal Sheets) — The Aluminum Association (2018)
- EN 485-2 Aluminium and aluminium alloys — Sheet, strip and plate — Mechanical properties — CEN (2016)
- ASTM B928/B928M Standard Specification for High Magnesium Aluminum-Alloy Sheet and Plate for Marine Service — ASTM International (2019)
- ASM Handbook Vol. 2: Properties and Selection — Nonferrous Alloys — ASM International (1990)
- Marine plate alloy 5383 H116/H321 data sheet — Aleris/Corus Aluminium Rolled Products (2010)
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.