Aluminum 5254-H34
Temper
AA 5254 · UNS A95254
H34 = strain hardened and stabilized, half hard
Half-hard stabilised sheet where higher yield strength is needed and bend radii can be generous.
Values for the H34 condition
Other 5254 tempers and conditions
5254 is listed in 14 conditions; see the grade overview at 5254.
Compare all 14 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Pick for deep drawing, spinning and tank heads, and for maximum resistance to sensitisation-related SCC. | 115 | 240 | 27 | 58 HB | 33 % IACS |
Strain hardened from hot working only | Standard temper for hot-rolled thick plate used in welded peroxide tanks and pressure vessels. | 115 | 240 | 25 | 63 HB | 33 % IACS |
Strain hardened and partially annealed, quarter hard | Over-worked then back-annealed to 1/4 hard; better ductility than H12 at similar strength. | 200 | 265 | 15 | 66 HB | 32 % IACS |
H32Default Strain hardened and stabilized, quarter hard | The standard stocked sheet/plate temper: good strength, still formable and weldable, with a stabilising anneal that locks in properties for Mg-bearing alloys. | 205 | 270 | 15 | 67 HB | 32 % IACS |
Strain hardened, quarter hard | Light cold work when a little extra strength is wanted but good bending is still needed; for 5254 usually superseded by the stabilised H32. | 210 | 270 | 13 | 67 HB | 32 % IACS |
Strain hardened and partially annealed, half hard | Half-hard with retained bendability — a common choice for formed vessel components. | 220 | 285 | 12 | 72 HB | 32 % IACS |
H34This page Strain hardened and stabilized, half hard | Half-hard stabilised sheet where higher yield strength is needed and bend radii can be generous. | 230 | 290 | 13 | 73 HB | 32 % IACS |
Strain hardened, half hard | Mid-hard cold-rolled sheet for moderately formed, higher-strength parts. | 240 | 290 | 10 | 73 HB | 32 % IACS |
Strain hardened and partially annealed, three-quarter hard | Three-quarter hard with slightly better formability than H16. | 245 | 305 | 10 | 77 HB | 32 % IACS |
Strain hardened and stabilized, three-quarter hard | Three-quarter hard stabilised sheet for strength-driven flat components. | 250 | 310 | 12 | 78 HB | 32 % IACS |
Strain hardened, three-quarter hard | High-strength cold-rolled sheet for flat or lightly formed panels. | 260 | 310 | 8 | 78 HB | 32 % IACS |
Strain hardened and partially annealed, full hard | Full-hard partially annealed sheet; highest strength available in thin gauge. | 265 | 325 | 7 | 80 HB | 32 % IACS |
Strain hardened and stabilized, full hard | Highest-strength stabilised temper; use only where forming and welding are minimal. | 270 | 330 | 10 | 80 HB | 32 % IACS |
Strain hardened, full hard | Maximum cold-worked strength, minimum ductility; flat product only, essentially no bending. | 285 | 330 | 6 | 82 HB | 32 % IACS |
What is 5254-H34?
5254-H34 is 5254 in the H34 temper — half-hard stabilised sheet where higher yield strength is needed and bend radii can be generous. 5254-H34 has a yield strength of 230 MPa (33.4 ksi) and a tensile strength of 290 MPa (42.1 ksi) — stronger than 60% of aluminum grades. Elongation at break is 13% and the elastic modulus is 70.3 GPa (10.2 Msi). 5254-H34 has a density of 2.66 g/cm³ (0.0961 lb/in³), lighter than 84% of aluminum grades. It melts at 593°C (1,099 °F). H32 is the default condition FabDigit quotes; H34 is available on request or by drawing note.
Advantages
- Good corrosion resistance — 80/100, better than 97% of aluminum grades
- Polishes to a fine finish — 70/100, better than 87% 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
Limitations
- Limited service temperature — 65°C (149 °F), worse than 97% of aluminum grades
5254-H34 properties
Typical room-temperature values for 5254-H34; 11 are specific to this condition. Other listed values are 5254 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
5254-H34 has a density of 2.66 g/cm³ (0.0961 lb/in³), lighter than 84% of aluminum grades. It melts at 593°C (1,099 °F).
Mechanical11
5254-H34 has a yield strength of 230 MPa (33.4 ksi) and a tensile strength of 290 MPa (42.1 ksi) — stronger than 60% of aluminum grades. Elongation at break is 13% and the elastic modulus is 70.3 GPa (10.2 Msi).
Thermal6
5254-H34 is rated for continuous service to 65°C (149 °F). It conducts heat at 126 W/m·K (72.8 BTU/hr·ft·°F), worse than 70% of aluminum grades. Thermal expansion is 23.9 µm/m·K (13.3 µin/in·°F).
Electrical3
5254-H34 conducts electricity at 32 % IACS, worse than 63% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is very good (80/100), better than 97% of aluminum grades.
Sustainability4
Producing a kilogram of 5254-H34 takes about 200 MJ of energy and emits 12 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 20%.
Manufacturability8
5254-H34's machinability is fair (48/100, worse than 68% of aluminum grades); weldability excellent (88/100); formability fair (50/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 5254-H34
Is 5254 easy to machine?
Gummy like all soft 5000 series — use sharp polished high-rake carbide, high surface speed, generous non-chlorinated coolant to avoid built-up edge; keep tooling free of iron/copper contamination for peroxide service.
Can 5254 be welded?
Readily GTAW/GMAW welded with 5356 or 5654 filler (5654 preferred for peroxide purity); as-welded joint strength approaches the O-temper level, so design to annealed properties.
Can 5254 be formed, bent or molded?
Excellent cold formability in O/H32; allow generous bend radii in H34 and above and avoid heating above ~65 °C in service after forming to prevent β-phase sensitisation.
What surface finishes work on 5254?
Anodises clear or hard with good uniformity; chemical cleaning and passivation of the surface is normally required before hydrogen-peroxide service to remove embedded iron and machining debris.
5254 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 |
|---|---|---|
| SiSi + Fe combined 0.45 max | ≤ 0.45 | — |
| FeSi + Fe combined 0.45 max | ≤ 0.45 | — |
| Cuheld low to avoid catalysing H2O2 decomposition | ≤ 0.05 | — |
| Mnkey difference vs 5154 | ≤ 0.01 | — |
| Mg | 3.1 – 3.9 | 3.5 |
| Cr | 0.15 – 0.35 | 0.25 |
| Zn | ≤ 0.2 | — |
| Ti | ≤ 0.05 | — |
| Others (each) | ≤ 0.05 | — |
| Others (total) | ≤ 0.15 | — |
| Al | balance | — |
5254-H34 — frequently asked
What is 5254-H34 used for?
5254-H34 is typically used for hydrogen peroxide tanks, chemical storage vessels and purity-critical piping. In short: peroxide-service Al-Mg alloy; high-purity, low-copper 5154; 80-rated corrosion resistance.
What is the yield strength of 5254-H34?
5254-H34 has a typical yield strength of 230 MPa (33.4 ksi) and a tensile strength of 290 MPa (42.1 ksi) — stronger than 60% of aluminum grades. Strength varies by condition: see the 14 listed tempers.
Is 5254-H34 easy to machine?
Reasonably — machinability is rated fair (48/100, worse than 68% of aluminum grades). Gummy like all soft 5000 series — use sharp polished high-rake carbide, high surface speed, generous non-chlorinated coolant to avoid built-up edge; keep tooling free of iron/copper contamination for peroxide service.
Can 5254-H34 be welded?
Yes — weldability is rated excellent (88/100). Readily GTAW/GMAW welded with 5356 or 5654 filler (5654 preferred for peroxide purity); as-welded joint strength approaches the O-temper level, so design to annealed properties.
What surface finishes work on 5254-H34?
Anodises clear or hard with good uniformity; chemical cleaning and passivation of the surface is normally required before hydrogen-peroxide service to remove embedded iron and machining debris.
Can 5254-H34 be formed, bent or molded?
Excellent cold formability in O/H32; allow generous bend radii in H34 and above and avoid heating above ~65 °C in service after forming to prevent β-phase sensitisation.
What is the maximum service temperature of 5254-H34?
5254-H34 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.
What is the difference between 5254-H32 and 5254-O?
H32 is the default condition — the standard stocked sheet/plate temper: good strength, still formable and weldable, with a stabilising anneal that locks in properties for Mg-bearing alloys. O: pick for deep drawing, spinning and tank heads, and for maximum resistance to sensitisation-related SCC. Yield strength is 205 MPa in H32 versus 115 MPa in O.
Sources
- International Alloy Designations and Chemical Composition Limits for Wrought Aluminum (Teal Sheets) — The Aluminum Association (2018)
- ASTM B209 — Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate — ASTM International (2021)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
- Aluminum Standards and Data — The Aluminum Association (2017)
- MMPDS / typical wrought aluminium physical property tables — Battelle (2023)
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.