Aluminum 5070-H34
Temper
AA 5070 · EN AlMg4MnZn
H34 = strain hardened and stabilized, half hard
Higher strength sheet for lightly formed panels, treadplate and vessel walls.
Values for the H34 condition
Other 5070 tempers and conditions
5070 is listed in 11 conditions; see the grade overview at 5070.
Compare all 11 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Maximum formability for deep drawing, bending and spinning; lowest strength. | 130 | 275 | 22 | 70 HB | 29 % IACS |
Strain hardened from hot working only | Thick hot-rolled plate and extrusions where only minimum guaranteed properties are needed. | 140 | 280 | 16 | 73 HB | 29 % IACS |
H111Default Slightly strain hardened | Standard stocked plate/sheet condition: near-annealed formability with slightly higher proof strength from straightening/levelling. | 150 | 290 | 17 | 75 HB | 29 % IACS |
Strain hardened, quarter hard | Cold-rolled quarter-hard sheet supplied without stabilizing anneal; use where age-softening is acceptable. | 210 | 300 | 12 | 84 HB | 29 % IACS |
Strain hardened and stabilized, quarter hard | General-purpose semi-hard sheet: good balance of formability and strength for tanks and structures. | 215 | 305 | 12 | 85 HB | 29 % IACS |
Strain hardened, corrosion-resistant marine temper | Marine hull and offshore plate: strength of H32 plus ASTM G66/G67 qualified resistance to exfoliation and intergranular attack. | 220 | 310 | 12 | 87 HB | 29 % IACS |
Strain hardened and stabilized, marine temper | Equivalent strength to H116 with a thermal stabilization step; specified for shipbuilding and cryogenic/LNG structures. | 220 | 310 | 12 | 87 HB | 29 % IACS |
Strain hardened, half hard | Cold-rolled half-hard sheet for flat, lightly formed components. | 255 | 335 | 9 | 94 HB | 29 % IACS |
H34This page Strain hardened and stabilized, half hard | Higher strength sheet for lightly formed panels, treadplate and vessel walls. | 260 | 340 | 9 | 95 HB | 29 % IACS |
Strain hardened and stabilized, three-quarter hard | Stiff, high-strength thin sheet and coil for lightly bent or roll-formed parts. | 290 | 360 | 7 | 100 HB | 29 % IACS |
Strain hardened and stabilized, full hard | Maximum strain-hardened strength for flat parts with minimal forming; lowest ductility. | 315 | 380 | 6 | 105 HB | 29 % IACS |
What is 5070-H34?
5070-H34 is 5070 in the H34 temper — higher strength sheet for lightly formed panels, treadplate and vessel walls. 5070-H34 has a yield strength of 260 MPa (37.7 ksi) and a tensile strength of 340 MPa (49.3 ksi) — stronger than 68% of aluminum grades. Elongation at break is 9% and the elastic modulus is 70.5 GPa (10.2 Msi). 5070-H34 has a density of 2.66 g/cm³ (0.0961 lb/in³), lighter than 84% of aluminum grades. It melts at 575°C (1,067 °F). H111 is the default condition FabDigit quotes; H34 is available on request or by drawing note.
Advantages
- Good corrosion resistance — 74/100, better than 87% of aluminum grades
- Readily welded — 85/100, better than 79% 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
5070-H34 properties
Typical room-temperature values for 5070-H34; 22 are specific to this condition. Other listed values are 5070 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
5070-H34 has a density of 2.66 g/cm³ (0.0961 lb/in³), lighter than 84% of aluminum grades. It melts at 575°C (1,067 °F).
Mechanical16
5070-H34 has a yield strength of 260 MPa (37.7 ksi) and a tensile strength of 340 MPa (49.3 ksi) — stronger than 68% of aluminum grades. Elongation at break is 9% and the elastic modulus is 70.5 GPa (10.2 Msi).
Thermal6
5070-H34 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 µm/m·K (13.3 µin/in·°F).
Electrical3
5070-H34 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 5070-H34 takes about 200 MJ of energy and emits 12.5 kg of CO₂ — less than 60% of aluminum grades. Typical recycled content is 35%.
Manufacturability8
5070-H34's machinability is good (55/100, worse than 59% of aluminum grades); weldability excellent (85/100); formability fair (45/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 5070-H34
Is 5070 easy to machine?
Machines like other Al-Mg alloys: use sharp polished high-rake carbide, high speed and generous coolant to avoid built-up edge and stringy chips; harder H3x tempers cut cleaner than O.
Can 5070 be welded?
Excellent GMAW/GTAW and FSW weldability with 5183/5356 filler; HAZ softens back toward the annealed strength, so design joints on O/H111 properties.
Can 5070 be formed, bent or molded?
Form in O/H111 for tight bends; watch for Lüders (stretcher-strain) marks on annealed sheet and increase bend radii sharply in H34–H38.
What surface finishes work on 5070?
Takes good clear or hard sulfuric anodizing and marine paint systems; mechanically polished surfaces stay slightly satin, and etch/anodize contrast can vary with Mn-Fe intermetallics.
5070 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 |
|---|---|---|
| Siimpurity limit | ≤ 0.25 | 0.1 |
| Feimpurity limit | ≤ 0.35 | 0.2 |
| Cukept low for corrosion resistance | ≤ 0.1 | 0.03 |
| Mngrain-structure control | 0.2 – 0.7 | 0.45 |
| Mgprincipal solid-solution strengthener | 3.6 – 4.6 | 4 |
| Cr | ≤ 0.3 | 0.1 |
| Zndeliberate addition for extra strength | 0.3 – 0.9 | 0.55 |
| Tigrain refiner | ≤ 0.15 | 0.03 |
| Zrrecrystallization control (when added) | ≤ 0.2 | 0.1 |
| Others (each) | ≤ 0.05 | — |
| Others (total) | ≤ 0.15 | — |
| Al | balance | — |
5070-H34 — frequently asked
What is 5070-H34 used for?
5070-H34 is typically used for marine structural sheet, welded hull and superstructure plate, boat deck and bulkhead panels, storage tank shells, truck and trailer body panels and welded structural fabrications. In short: zn-modified 5000-series sheet; higher strength than 5754; marine welded fabrication.
What is the yield strength of 5070-H34?
5070-H34 has a typical yield strength of 260 MPa (37.7 ksi) and a tensile strength of 340 MPa (49.3 ksi) — stronger than 68% of aluminum grades. Strength varies by condition: see the 11 listed tempers.
Is 5070-H34 easy to machine?
Reasonably — machinability is rated good (55/100, worse than 59% of aluminum grades). Machines like other Al-Mg alloys: use sharp polished high-rake carbide, high speed and generous coolant to avoid built-up edge and stringy chips; harder H3x tempers cut cleaner than O.
Can 5070-H34 be welded?
Yes — weldability is rated excellent (85/100). Excellent GMAW/GTAW and FSW weldability with 5183/5356 filler; HAZ softens back toward the annealed strength, so design joints on O/H111 properties.
What surface finishes work on 5070-H34?
Takes good clear or hard sulfuric anodizing and marine paint systems; mechanically polished surfaces stay slightly satin, and etch/anodize contrast can vary with Mn-Fe intermetallics.
Can 5070-H34 be formed, bent or molded?
Form in O/H111 for tight bends; watch for Lüders (stretcher-strain) marks on annealed sheet and increase bend radii sharply in H34–H38.
What is the maximum service temperature of 5070-H34?
5070-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 5070-H111 and 5070-H38?
H111 is the default condition — standard stocked plate/sheet condition: near-annealed formability with slightly higher proof strength from straightening/levelling. H38: maximum strain-hardened strength for flat parts with minimal forming; lowest ductility. Yield strength is 150 MPa in H111 versus 315 MPa in H38.
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 B209 / B928 — Aluminum-Alloy Sheet and Plate; High-Magnesium Marine Plate — ASTM International (2021)
- ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- Aluminum: Properties and Physical Metallurgy (Hatch) — ASM International (1984)
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.