Aluminum 1070A-H26
Supply condition
AA 1070A · EN AW-1070A, 3.0275
H26 = strain hardened and partially annealed, three-quarter hard
Pick for stiff strip needing more residual ductility and shape stability than H16.
Values for the H26 condition
Other 1070A tempers and conditions
1070A is listed in 11 conditions; see the grade overview at 1070A.
Compare all 11 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
ODefault Annealed | Pick for maximum ductility, deep drawing, spinning and best bright-anodizing appearance. | 25 | 70 | 40 | 20 HB | 61.5 % IACS |
Slightly strain hardened | Pick for sheet/plate that received minor straightening or flattening after annealing but must stay essentially soft. | 28 | 72 | 33 | 21 HB | 61.5 % IACS |
As fabricated | Pick for hot-rolled plate, extrusions or forgings where properties are not guaranteed and further working/annealing follows. | 30 | 75 | 32 | 21 HB | 61 % IACS |
Strain hardened from hot working only | Pick for thicker hot-rolled plate or extrusions where a guaranteed minimum strength is required without cold work. | 35 | 75 | 25 | 23 HB | 61 % IACS |
Strain hardened and partially annealed, quarter hard | Pick when H12-level strength is wanted with better ductility and flatness stability from a stabilizing partial anneal. | 58 | 85 | 15 | 24 HB | 61 % IACS |
Strain hardened, quarter hard | Pick when a modest strength gain over O is needed while keeping good bendability. | 70 | 90 | 12 | 25 HB | 61 % IACS |
Strain hardened and partially annealed, half hard | Pick for half-hard strip that must still bend or roll-form without cracking — common for trim and reflectors. | 74 | 100 | 11 | 28 HB | 60.5 % IACS |
Strain hardened, half hard | Pick as the general-purpose stiffer sheet temper for panels, nameplates and cladding with mild forming. | 88 | 105 | 8 | 30 HB | 60.5 % IACS |
H26This page Strain hardened and partially annealed, three-quarter hard | Pick for stiff strip needing more residual ductility and shape stability than H16. | 90 | 115 | 7 | 32 HB | 60 % IACS |
Strain hardened, three-quarter hard | Pick for stiffer flat strip or shallow-formed parts where springiness and dent resistance matter. | 102 | 120 | 5 | 34 HB | 60 % IACS |
Strain hardened, full hard | Pick for thin foil/strip, reflector sheet and applications needing the highest strength and smoothest as-rolled surface. | 115 | 135 | 4 | 38 HB | 59.5 % IACS |
What is 1070A-H26?
1070A-H26 is 1070A supplied in the H26 condition — pick for stiff strip needing more residual ductility and shape stability than H16. 1070A-H26 has a yield strength of 90 MPa (13.1 ksi) and a tensile strength of 115 MPa (16.7 ksi) — weaker than 87% of aluminum grades. Elongation at break is 7% and the elastic modulus is 69 GPa (10 Msi). 1070A-H26 has a density of 2.7 g/cm³ (0.0975 lb/in³), lighter than 59% of aluminum grades. It melts at 646°C (1,195 °F). O is the default condition FabDigit quotes; H26 is available on request or by drawing note.
Advantages
- Readily welded — 95/100, better than 99% of aluminum grades
- Polishes to a fine finish — 90/100, better than 98% of aluminum grades
- Conducts heat well — 228 W/m·K (131.7 BTU/hr·ft·°F), better than 95% of aluminum grades
- High electrical conductivity — 60 % IACS, better than 95% of aluminum grades
- Good corrosion resistance — 76/100, better than 90% of aluminum grades
Limitations
- Low strength — 90 MPa (13.1 ksi), worse than 87% of aluminum grades
- Difficult to machine — 41/100, worse than 78% of aluminum grades
1070A-H26 properties
Typical room-temperature values for 1070A-H26; 10 are specific to this condition. Other listed values are 1070A reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
1070A-H26 has a density of 2.7 g/cm³ (0.0975 lb/in³), lighter than 59% of aluminum grades. It melts at 646°C (1,195 °F).
Mechanical11
1070A-H26 has a yield strength of 90 MPa (13.1 ksi) and a tensile strength of 115 MPa (16.7 ksi) — weaker than 87% of aluminum grades. Elongation at break is 7% and the elastic modulus is 69 GPa (10 Msi).
Thermal6
1070A-H26 is rated for continuous service to 150°C (302 °F). It conducts heat at 228 W/m·K (131.7 BTU/hr·ft·°F), better than 95% of aluminum grades. Thermal expansion is 23.6 µm/m·K (13.1 µin/in·°F).
Electrical3
1070A-H26 conducts electricity at 60 % IACS, better than 95% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is very good (76/100), better than 90% of aluminum grades.
Sustainability4
Producing a kilogram of 1070A-H26 takes about 205 MJ of energy and emits 12.5 kg of CO₂ — more than 76% of aluminum grades. Typical recycled content is 5%.
Manufacturability7
1070A-H26's machinability is fair (41/100, worse than 78% of aluminum grades); weldability excellent (95/100); formability good (64/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1070A-H26
Is 1070A easy to machine?
Very gummy — use polished high-rake carbide, high speed, sharp tools and flood coolant/lubricant to avoid built-up edge and tearing.
Can 1070A be welded?
Excellent with TIG/MIG using 1100 or 1188 pure-Al filler; joints are soft and any cold work is lost in the HAZ.
Can 1070A be formed, bent or molded?
Outstanding cold formability in O/H1x2 tempers — deep drawing, spinning, embossing and foil rolling; interanneal around 340–400 °C after heavy work.
What surface finishes work on 1070A?
Ideal for bright-dip, clear and specular anodizing and chemical/electro-brightening; the low Fe/Si keeps films colourless, and it also takes electroless plating and paint after conversion coating.
1070A 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 |
|---|---|---|
| SiEN 573-3 limit | ≤ 0.2 | 0.08 |
| Fetighter than 1070 practice | ≤ 0.25 | 0.15 |
| Cu | ≤ 0.03 | 0.01 |
| Mn | ≤ 0.03 | 0.01 |
| Mg | ≤ 0.03 | 0.01 |
| Zn | ≤ 0.07 | 0.02 |
| Ti | ≤ 0.03 | 0.01 |
| Others (each)each other element | ≤ 0.03 | — |
| Alminimum aluminium content | ≥ 99.7 (balance) | — |
1070A-H26 — frequently asked
What is 1070A-H26 used for?
1070A-H26 is typically used for anodized architectural trim, reflectors, chemical tanks and electrical parts. In short: low Fe/Si for clear anodizing; near-maximum formability; softest practical sheet grade.
What is the yield strength of 1070A-H26?
1070A-H26 has a typical yield strength of 90 MPa (13.1 ksi) and a tensile strength of 115 MPa (16.7 ksi) — weaker than 87% of aluminum grades. Strength varies by condition: see the 11 listed tempers.
Is 1070A-H26 easy to machine?
Not especially — machinability is rated fair (41/100, worse than 78% of aluminum grades). Very gummy — use polished high-rake carbide, high speed, sharp tools and flood coolant/lubricant to avoid built-up edge and tearing.
Can 1070A-H26 be welded?
Yes — weldability is rated excellent (95/100). Excellent with TIG/MIG using 1100 or 1188 pure-Al filler; joints are soft and any cold work is lost in the HAZ.
What surface finishes work on 1070A-H26?
Ideal for bright-dip, clear and specular anodizing and chemical/electro-brightening; the low Fe/Si keeps films colourless, and it also takes electroless plating and paint after conversion coating.
Can 1070A-H26 be formed, bent or molded?
Outstanding cold formability in O/H1x2 tempers — deep drawing, spinning, embossing and foil rolling; interanneal around 340–400 °C after heavy work.
What is the maximum service temperature of 1070A-H26?
1070A-H26 is rated for continuous use to about 150°C (302 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 1070A-O and 1070A-H18?
O is the default condition — pick for maximum ductility, deep drawing, spinning and best bright-anodizing appearance. H18: pick for thin foil/strip, reflector sheet and applications needing the highest strength and smoothest as-rolled surface. Yield strength is 25 MPa in O versus 115 MPa in H18.
Sources
- EN 573-3 Aluminium and aluminium alloys — chemical composition — CEN (2019)
- EN 485-2 Aluminium sheet, strip and plate — mechanical properties — CEN (2018)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- International Alloy Designations and Chemical Composition Limits (Teal Sheets) — The Aluminum Association (2018)
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.