Aluminum 1070A
AA 1070A · EN AW-1070A, 3.0275
1070A is a refined commercially pure aluminum grade (99.7% Al) in the EN 573 1000-series family, with lower iron and silicon limits than 1070 and no heat-treatable strengthening.
Reference datasheet — 1070A is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the O condition
1070A tempers and conditions
1070A is supplied in 11 conditions, soft to hard. O is the default FabDigit quotes; the values on this page are for it.
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 |
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?
1070A is a refined commercially pure aluminum grade (99.7% Al) in the EN 573 1000-series family, with lower iron and silicon limits than 1070 and no heat-treatable strengthening. It is chosen for anodized and reflective surfaces, chemical service and electrical parts, where 231 W/m·K thermal conductivity, 61.5% IACS conductivity and 40% elongation matter; typical forms are sheet, strip, foil and plate in O and H1x/H2x tempers. In the annealed condition strength is only 25 MPa yield and 70 MPa tensile (20 HB), so parts must be designed for stiffness and geometry rather than load. Service is limited to about 150 °C; use 1050A where a slightly stronger commercial-purity sheet is acceptable. 1070A 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). 1070A has a yield strength of 25 MPa (3.63 ksi) and a tensile strength of 70 MPa (10.2 ksi) — weaker than 98% of aluminum grades. Elongation at break is 40% and the elastic modulus is 69 GPa (10 Msi).
What is 1070A used for?
- anodized architectural trim
- reflectors
- chemical tanks
- electrical parts
Advantages
- Readily welded — 95/100, better than 99% of aluminum grades
- Ductile — tolerates forming and impact — 40%, better than 98% of aluminum grades
- Forms and bends easily — 98/100, better than 98% of aluminum grades
- Polishes to a fine finish — 90/100, better than 98% of aluminum grades
- Conducts heat well — 231 W/m·K (133.5 BTU/hr·ft·°F), better than 97% of aluminum grades
Limitations
- Low strength — 25 MPa (3.63 ksi), worse than 98% of aluminum grades
- Difficult to machine — 30/100, worse than 92% of aluminum grades
1070A properties
Typical room-temperature values for 1070A-O; bars are the position among aluminum grades.
Physical3
1070A 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 has a yield strength of 25 MPa (3.63 ksi) and a tensile strength of 70 MPa (10.2 ksi) — weaker than 98% of aluminum grades. Elongation at break is 40% and the elastic modulus is 69 GPa (10 Msi).
Thermal6
1070A is rated for continuous service to 150°C (302 °F). It conducts heat at 231 W/m·K (133.5 BTU/hr·ft·°F), better than 97% of aluminum grades. Thermal expansion is 23.6 µm/m·K (13.1 µin/in·°F).
Electrical3
1070A conducts electricity at 61.5 % IACS, better than 97% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is very good (76/100), better than 90% of aluminum grades.
Sustainability4
Producing a kilogram of 1070A 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's machinability is poor (30/100, worse than 92% of aluminum grades); weldability excellent (95/100); formability excellent (98/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the aluminum family
Yield strength against density for every aluminum grade FabDigit runs. 1070A is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1070A
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.
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) |
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.
Surface treatments FabDigit runs on aluminum parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Organic Coating
Equivalent designations
Standards and trade names that resolve to Aluminum 1070A in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- AW-1070A3.0275
How much does 1070A cost?
1070A is a standard-cost aluminum ($$), cheaper than about 71% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
1070A — frequently asked
What is 1070A used for?
1070A 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?
1070A has a typical yield strength of 25 MPa (3.63 ksi) and a tensile strength of 70 MPa (10.2 ksi) — weaker than 98% of aluminum grades. Strength varies by condition: see the 11 listed tempers.
Is 1070A easy to machine?
Not especially — machinability is rated poor (30/100, worse than 92% 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 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?
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 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?
1070A 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.
How much does 1070A cost?
1070A is a standard-cost aluminum ($$), cheaper than about 71% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
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; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.