Aluminum 1090-H26
Supply condition
AA 1090 · EN AW-1090, AW 1090
H26 = strain hardened and partially annealed, three-quarter hard
Stiff strip that must still take a light forming or seaming operation.
Values for the H26 condition
Other 1090 tempers and conditions
1090 is listed in 11 conditions; see the grade overview at 1090.
Compare all 11 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Default stock condition: maximum ductility and conductivity for deep drawing, spinning, foil, capacitor and conductor applications. | 22 | 65 | 42 | 19 HB | 62 % IACS |
As fabricated | Hot-rolled or extruded stock with no mechanical property guarantee — for remelt, further working or non-structural parts. | 30 | 70 | 30 | 20 HB | 62 % IACS |
Strain hardened and partially annealed, quarter hard | Back-annealed from a harder temper for better ductility at the same strength level as H12 — good for drawn/stretched parts. | 60 | 80 | 22 | 23 HB | 61.9 % IACS |
Strain hardened, quarter hard | Light cold work for slightly stiffer sheet/strip that still bends and forms readily. | 65 | 80 | 20 | 24 HB | 61.8 % IACS |
Strain hardened and partially annealed, half hard | Half-hard strength with noticeably better bend performance than H14; common for formed foil laminates and strip. | 75 | 95 | 12 | 26 HB | 61.6 % IACS |
Strain hardened, half hard | Best general-purpose sheet balance: usable stiffness with acceptable bending for enclosures, trim and conductor strip. | 80 | 95 | 10 | 27 HB | 61.5 % IACS |
H26This page Strain hardened and partially annealed, three-quarter hard | Stiff strip that must still take a light forming or seaming operation. | 90 | 110 | 8 | 29 HB | 61.3 % IACS |
Strain hardened, three-quarter hard | Choose for flat parts needing more springiness and dent resistance with only mild forming. | 95 | 110 | 7 | 30 HB | 61.3 % IACS |
Strain hardened and partially annealed, full hard | Full-hard strength with slightly relieved internal stress; used for flat, springy thin strip and foil. | 105 | 125 | 5 | 32 HB | 61 % IACS |
Strain hardened, full hard | Fully cold-worked strip and household/technical foil where flatness and stiffness matter more than bending. | 110 | 125 | 5 | 33 HB | 61 % IACS |
Strain hardened, extra hard | Highest cold-work level, typical of thin technical foil and drawn wire; essentially no formability left. | 125 | 140 | 3 | 35 HB | 60.8 % IACS |
What is 1090-H26?
1090-H26 is 1090 supplied in the H26 condition — stiff strip that must still take a light forming or seaming operation. 1090-H26 has a yield strength of 90 MPa (13.1 ksi) and a tensile strength of 110 MPa (16 ksi) — weaker than 87% of aluminum grades. Elongation at break is 8% and the elastic modulus is 69 GPa (10 Msi). 1090-H26 has a density of 2.7 g/cm³ (0.0975 lb/in³), lighter than 59% of aluminum grades. It melts at 657°C (1,215 °F).
Advantages
- High electrical conductivity — 61.3 % IACS, better than 97% of aluminum grades
- Polishes to a fine finish — 88/100, better than 97% of aluminum grades
- Conducts heat well — 229 W/m·K (132.3 BTU/hr·ft·°F), better than 96% of aluminum grades
- Good corrosion resistance — 78/100, better than 94% of aluminum grades
- Readily welded — 89/100, better than 87% of aluminum grades
Limitations
- Limited service temperature — 100°C (212 °F), worse than 91% of aluminum grades
- Difficult to machine — 32/100, worse than 89% of aluminum grades
- Low strength — 90 MPa (13.1 ksi), worse than 87% of aluminum grades
1090-H26 properties
Typical room-temperature values for 1090-H26; 19 are specific to this condition. Other listed values are 1090 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
1090-H26 has a density of 2.7 g/cm³ (0.0975 lb/in³), lighter than 59% of aluminum grades. It melts at 657°C (1,215 °F).
Mechanical10
1090-H26 has a yield strength of 90 MPa (13.1 ksi) and a tensile strength of 110 MPa (16 ksi) — weaker than 87% of aluminum grades. Elongation at break is 8% and the elastic modulus is 69 GPa (10 Msi).
Thermal6
1090-H26 is rated for continuous service to 100°C (212 °F). It conducts heat at 229 W/m·K (132.3 BTU/hr·ft·°F), better than 96% of aluminum grades. Thermal expansion is 23.6 µm/m·K (13.1 µin/in·°F).
Electrical3
1090-H26 conducts electricity at 61.3 % IACS, better than 97% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is very good (78/100), better than 94% of aluminum grades.
Sustainability4
Producing a kilogram of 1090-H26 takes about 215 MJ of energy and emits 12.5 kg of CO₂ — more than 93% of aluminum grades. Typical recycled content is 5%.
Manufacturability8
1090-H26's machinability is poor (32/100, worse than 89% of aluminum grades); weldability excellent (89/100); formability good (65/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1090-H26
Is 1090 easy to machine?
Very gummy — use polished high-rake carbide, high speed, sharp tools and generous lubrication to avoid built-up edge and torn surfaces; not suited to fine threads or tight tolerances.
Can 1090 be welded?
Excellent with TIG/MIG using ER1100 or high-purity ER1188 filler; resistance and ultrasonic welding also fine, but the weld and HAZ are annealed so H-temper strength is lost.
Can 1090 be formed, bent or molded?
Outstanding cold formability in O/H2x tempers — deep drawing, spinning, embossing and rolling down to thin foil; expect strong springback-free but low-strength results and possible orange-peel from coarse grain.
What surface finishes work on 1090?
Ideal base for bright/clear anodising, chemical brightening and mirror polishing (reflectors, trim); films are thin and soft, so hard anodising or plating is preferred where wear matters.
1090 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 |
|---|---|---|
| Simax per EN 573-3 / AA registration | ≤ 0.07 | 0.03 |
| Fe | ≤ 0.07 | 0.04 |
| Cu | ≤ 0.02 | 0.01 |
| Mn | ≤ 0.01 | 0 |
| Mg | ≤ 0.01 | 0 |
| Zn | ≤ 0.03 | 0.01 |
| Ti | ≤ 0.02 | 0.01 |
| V | ≤ 0.05 | 0.01 |
| Ga | ≤ 0.03 | 0.01 |
| Others (each)others total 0.03 max | ≤ 0.01 | — |
| AlAl99.90 — verify exact impurity limits against the governing edition of EN 573-3 / GB/T 3190 | ≥ 99.9 (balance) | — |
1090-H26 — frequently asked
What is 1090-H26 used for?
1090-H26 is typically used for capacitor foil, vacuum-chamber components, reflector sheet, conductor and busbar stock, bright-anodized trim and thin-gauge rolled foil. In short: near-pure aluminum; ultra-clean.
What is the yield strength of 1090-H26?
1090-H26 has a typical yield strength of 90 MPa (13.1 ksi) and a tensile strength of 110 MPa (16 ksi) — weaker than 87% of aluminum grades. Strength varies by condition: see the 11 listed tempers.
Is 1090-H26 easy to machine?
Not especially — machinability is rated poor (32/100, worse than 89% of aluminum grades). Very gummy — use polished high-rake carbide, high speed, sharp tools and generous lubrication to avoid built-up edge and torn surfaces; not suited to fine threads or tight tolerances.
Can 1090-H26 be welded?
Yes — weldability is rated excellent (89/100). Excellent with TIG/MIG using ER1100 or high-purity ER1188 filler; resistance and ultrasonic welding also fine, but the weld and HAZ are annealed so H-temper strength is lost.
What surface finishes work on 1090-H26?
Ideal base for bright/clear anodising, chemical brightening and mirror polishing (reflectors, trim); films are thin and soft, so hard anodising or plating is preferred where wear matters.
Can 1090-H26 be formed, bent or molded?
Outstanding cold formability in O/H2x tempers — deep drawing, spinning, embossing and rolling down to thin foil; expect strong springback-free but low-strength results and possible orange-peel from coarse grain.
What is the maximum service temperature of 1090-H26?
1090-H26 is rated for continuous use to about 100°C (212 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Can FabDigit make parts in 1090-H26?
Yes — 1090-H26 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
- EN 573-3 — Aluminium and aluminium alloys, chemical composition of wrought products — CEN (2019)
- International Alloy Designations and Chemical Composition Limits for Wrought Aluminum (Teal Sheets) — The Aluminum Association (2018)
- EN 485-2 — Aluminium sheet, strip and plate: mechanical properties — CEN (2021)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol. 13B — Corrosion: Materials — ASM International (2005)
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.