Aluminum 5456-H323
Supply condition
AA 5456 · UNS A95456 · EN AW-5456, AW 5456
H323 = strain hardened and stabilized to 1/4-hard-plus level
Stabilized sheet temper for stiffer formed marine panels needing stress-corrosion resistance.
Values for the H323 condition
Other 5456 tempers and conditions
5456 is listed in 9 conditions; see the grade overview at 5456.
Compare all 9 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Pick for maximum formability — deep drawing, severe bending, spinning — then accept the lowest strength. | 160 | 310 | 24 | 70 HB | 29 % IACS |
Strain hardened from hot working only | Hot-rolled thick plate temper for structural work where H116/H321 exfoliation testing is not required. | 165 | 310 | 18 | 73 HB | 29 % IACS |
Slightly strain hardened | Annealed-plus-light-working sheet/plate: a bit stiffer than O while still forming and welding easily. | 180 | 315 | 20 | 75 HB | 29 % IACS |
Strain hardened and stabilized, marine temper | Choose for marine plate where stabilization against age-softening/sensitization is specified; properties match H116. | 255 | 352 | 16 | 90 HB | 29 % IACS |
Strain hardened and stabilized, quarter hard | Al-Mg5Mn work-hardened to a quarter-hard level and thermally stabilized, giving marine-grade strength with good weldability and seawater corrosion resistance. | 255 | 352 | 16 | 90 HB | 29 % IACS |
Strain hardened, exfoliation-resistant | Sheet-gauge counterpart of H116 with the same strength envelope and exfoliation qualification. | 255 | 350 | 14 | 90 HB | 29 % IACS |
Strain hardened, corrosion-resistant marine temper | The standard marine plate/sheet temper: highest 5000-series strength with mandatory ASTM G66/G67 exfoliation qualification. | 258 | 352 | 16 | 90 HB | 29 % IACS |
H323This page Strain hardened and stabilized to 1/4-hard-plus level | Stabilized sheet temper for stiffer formed marine panels needing stress-corrosion resistance. | 270 | 365 | 10 | 95 HB | 29 % IACS |
Strain hardened and stabilized to 3/4-hard level | Highest-strength stabilized sheet temper of 5456 — for flat or lightly formed panels where strength governs. | 320 | 400 | 8 | 105 HB | 29 % IACS |
What is 5456-H323?
5456-H323 is 5456 supplied in the H323 condition — stabilized sheet temper for stiffer formed marine panels needing stress-corrosion resistance. 5456-H323 has a yield strength of 270 MPa (39.2 ksi) and a tensile strength of 365 MPa (52.9 ksi) — stronger than 69% of aluminum grades. Elongation at break is 10% and the elastic modulus is 71 GPa (10.3 Msi). 5456-H323 has a density of 2.66 g/cm³ (0.0961 lb/in³), lighter than 84% of aluminum grades. It melts at 568°C (1,054 °F).
Advantages
- Good corrosion resistance — 74/100, better than 87% of aluminum grades
- Readily welded — 88/100, better than 85% of aluminum grades
- Tough — resists crack growth — 32 MPa·√m (29.1 ksi·√in), better than 83% 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
5456-H323 properties
Typical room-temperature values for 5456-H323; 21 are specific to this condition. Other listed values are 5456 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
5456-H323 has a density of 2.66 g/cm³ (0.0961 lb/in³), lighter than 84% of aluminum grades. It melts at 568°C (1,054 °F).
Mechanical13
5456-H323 has a yield strength of 270 MPa (39.2 ksi) and a tensile strength of 365 MPa (52.9 ksi) — stronger than 69% of aluminum grades. Elongation at break is 10% and the elastic modulus is 71 GPa (10.3 Msi).
Thermal6
5456-H323 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 23.9 µm/m·K (13.3 µin/in·°F).
Electrical3
5456-H323 conducts electricity at 29 % IACS, worse than 78% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is very good (74/100), better than 87% of aluminum grades.
Sustainability4
Producing a kilogram of 5456-H323 takes about 200 MJ of energy and emits 12.5 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 35%.
Manufacturability7
5456-H323's machinability is fair (52/100, worse than 63% of aluminum grades); weldability excellent (88/100); formability fair (35/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 5456-H323
Is 5456 easy to machine?
Machines like other 5000 series: gummy chips, needs sharp polished-flute tools, high rake, high speed and flood coolant; hard tempers cut cleaner than O.
Can 5456 be welded?
Excellent for GMAW/GTAW and FSW with 5183 (preferred), 5356 or 5556 filler; never use 4000 series Si filler and keep interpass temperature low to avoid sensitization.
Can 5456 be formed, bent or molded?
Form in O/H111 for tight radii; H116/H321 plate needs generous bend radii and warm forming, and stretcher-strain (Lüders) marks can appear on annealed sheet.
What surface finishes work on 5456?
Takes clear and hard anodize well (slightly grey film), etch/conversion coats and marine paint systems readily; polishes to a satin rather than mirror finish.
5456 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 | — |
| Fe | ≤ 0.4 | — |
| Cu | ≤ 0.1 | — |
| Mn | 0.5 – 1 | 0.75 |
| Mgprimary strengthening addition | 4.7 – 5.5 | 5.1 |
| Cr | 0.05 – 0.2 | 0.1 |
| Zn | ≤ 0.25 | — |
| Ti | ≤ 0.2 | — |
| Others (each)total 0.15 max | ≤ 0.05 | — |
| Al | balance | — |
5456-H323 — frequently asked
What is 5456-H323 used for?
5456-H323 is typically used for marine hull and structural plate, deck houses and superstructures, pressure vessels, armour-grade plate, welded ship frames and bulkheads and storage tanks for marine service. In short: rugged marine structural grade.
What is the yield strength of 5456-H323?
5456-H323 has a typical yield strength of 270 MPa (39.2 ksi) and a tensile strength of 365 MPa (52.9 ksi) — stronger than 69% of aluminum grades. Strength varies by condition: see the 9 listed tempers.
Is 5456-H323 easy to machine?
Reasonably — machinability is rated fair (52/100, worse than 63% of aluminum grades). Machines like other 5000 series: gummy chips, needs sharp polished-flute tools, high rake, high speed and flood coolant; hard tempers cut cleaner than O.
Can 5456-H323 be welded?
Yes — weldability is rated excellent (88/100). Excellent for GMAW/GTAW and FSW with 5183 (preferred), 5356 or 5556 filler; never use 4000 series Si filler and keep interpass temperature low to avoid sensitization.
What surface finishes work on 5456-H323?
Takes clear and hard anodize well (slightly grey film), etch/conversion coats and marine paint systems readily; polishes to a satin rather than mirror finish.
Can 5456-H323 be formed, bent or molded?
Form in O/H111 for tight radii; H116/H321 plate needs generous bend radii and warm forming, and stretcher-strain (Lüders) marks can appear on annealed sheet.
What is the maximum service temperature of 5456-H323?
5456-H323 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.
Can FabDigit make parts in 5456-H323?
Yes — 5456-H323 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
- Aluminum Association Teal Sheets — International Alloy Designations and Chemical Composition Limits — The Aluminum Association (2018)
- ASTM B928 — High-Magnesium Aluminum-Alloy Sheet and Plate for Marine Service — ASTM International (2019)
- ASTM B209 — Aluminum and Aluminum-Alloy Sheet and Plate — ASTM International (2021)
- EN 485-2 / EN 573-3 (EN AW-5456) — CEN (2016)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol. 13B — Corrosion: Materials (aluminium in marine service) — ASM International (2005)
- MMPDS-typical wrought aluminium property tables — Battelle/FAA (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.