Aluminum 1070
AA 1070 · UNS A91070 · EN Al99.7, AW-1070 · JIS A1070
1070 is a commercially pure wrought aluminium (99.70 % Al min) supplied mainly as sheet, strip, foil, busbar and wire.
1070 tempers and conditions
1070 is supplied in 11 conditions, soft to hard.
Compare all 11 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Default stock condition for foil, deep-drawn parts, capacitor/conductor strip and anything needing maximum ductility and conductivity. | 25 | 68 | 43 | 19 HB | 59.5 % IACS |
As fabricated | Hot-rolled plate, extrusions and forgings where mechanical properties are not guaranteed. | 35 | 75 | 30 | 21 HB | 59 % IACS |
Strain hardened from hot working only | Hot-worked extrusion/plate temper of 99.7% pure aluminium retaining slight work hardening, giving strength just above annealed with very high ductility and conductivity. | 40 | 80 | 25 | 22 HB | 59 % IACS |
Strain hardened and partially annealed, quarter hard | Back-annealed light temper giving H12-level strength with better ductility for forming. | 62 | 88 | 16 | 26 HB | 59 % IACS |
Strain hardened, quarter hard | Light cold work when slightly more stiffness/handling strength is needed but forming is still required. | 70 | 85 | 12 | 25 HB | 59 % IACS |
Strain hardened and partially annealed, half hard | Half-hard sheet with restored ductility — preferred over H14 when tight bends or spinning are required. | 80 | 105 | 11 | 31 HB | 58.8 % IACS |
Strain hardened, half hard | Most common cold-worked sheet temper: better handling strength and flatness with moderate bending ability. | 92 | 105 | 8 | 30 HB | 58.8 % IACS |
Strain hardened and partially annealed, three-quarter hard | Higher-strength back-annealed strip for roll-formed and stamped parts needing some bend capability. | 100 | 120 | 7 | 34 HB | 58.6 % IACS |
Strain hardened, three-quarter hard | Choose for flat strip and stamped parts needing higher stiffness with only gentle bends. | 105 | 120 | 5 | 33 HB | 58.6 % IACS |
Strain hardened, full hard | Full-hard strip/foil for maximum work-hardened strength, springy flatness and clean blanking. | 122 | 135 | 4 | 35 HB | 58.5 % IACS |
Strain hardened, extra hard | Extra-hard drawn wire and very thin foil where maximum as-drawn strength is needed. | 140 | 155 | 2.5 | 38 HB | 58 % IACS |
What is 1070?
1070 is a commercially pure wrought aluminium (99.70 % Al min) supplied mainly as sheet, strip, foil, busbar and wire. It is chosen for its very high electrical and thermal conductivity, excellent corrosion resistance in atmospheric and many chemical environments, and outstanding cold formability/deep-drawability, plus bright-anodizing and reflectivity quality. Its limits are very low strength (it cannot be heat-treated and only work-hardens modestly), poor machinability due to gumminess, and softening/creep above roughly 100–150 °C. 1070 has a density of 2.71 g/cm³ (0.0977 lb/in³), lighter than 54% of aluminum grades. It melts at 646°C (1,195 °F). 1070 has a yield strength of 25 MPa (3.63 ksi) and a tensile strength of 68 MPa (9.86 ksi) — weaker than 98% of aluminum grades. Elongation at break is 43% and the elastic modulus is 69 GPa (10 Msi).
What is 1070 used for?
- Electrical conductors and busbars
- Chemical processing tanks and liners
- Deep-drawn and spun vessels
- Foil and thin strip
- Reflector sheet and bright trim
- Heat transfer fin stock
- Cable and wire conductors
Advantages
- Ductile — tolerates forming and impact — 43%, better than 99% of aluminum grades
- Forms and bends easily — 97/100, better than 97% of aluminum grades
- Conducts heat well — 227 W/m·K (131.2 BTU/hr·ft·°F), better than 95% of aluminum grades
- High electrical conductivity — 59.5 % IACS, better than 95% of aluminum grades
- Readily welded — 92/100, better than 95% of aluminum grades
Limitations
- Low strength — 25 MPa (3.63 ksi), worse than 98% of aluminum grades
- Difficult to machine — 35/100, worse than 86% of aluminum grades
1070 properties
Typical room-temperature values; bars are the position among aluminum grades.
Physical3
1070 has a density of 2.71 g/cm³ (0.0977 lb/in³), lighter than 54% of aluminum grades. It melts at 646°C (1,195 °F).
Mechanical10
1070 has a yield strength of 25 MPa (3.63 ksi) and a tensile strength of 68 MPa (9.86 ksi) — weaker than 98% of aluminum grades. Elongation at break is 43% and the elastic modulus is 69 GPa (10 Msi).
Thermal6
1070 is rated for continuous service to 150°C (302 °F). It conducts heat at 227 W/m·K (131.2 BTU/hr·ft·°F), better than 95% of aluminum grades. Thermal expansion is 23.6 µm/m·K (13.1 µin/in·°F).
Electrical3
1070 conducts electricity at 59.5 % IACS, better than 95% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is very good (78/100), better than 94% of aluminum grades.
Sustainability4
Producing a kilogram of 1070 takes about 205 MJ of energy and emits 12.5 kg of CO₂ — more than 76% of aluminum grades. Typical recycled content is 10%.
Manufacturability7
1070's machinability is fair (35/100, worse than 86% of aluminum grades); weldability excellent (92/100); formability excellent (97/100).
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. 1070 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1070
Is 1070 easy to machine?
Very soft and gummy — use polished high-rake tools, sharp inserts, high speed with low feed and generous lubricant; consider H18 temper or 6061 substitution for machined parts.
Can 1070 be welded?
Excellent with TIG/MIG using 1100 or 1188 filler (1070 wire for conductor work); resistance and friction-stir welding also fine, but weld metal reverts to annealed strength.
Can 1070 be formed, bent or molded?
Outstanding deep drawing, spinning, roll forming and foil rolling in O/H2x tempers; springback is low but the material galls, so use good lubrication and polished dies.
Manufacturability
The process limits FabDigit applies to 1070. Every 1070 part is priced by an engineer; design inside these and the quote comes back without a redesign loop.
CNC machining
| Machinability | Fair35 / 100 |
|---|---|
| ISO material group | N.1 |
| Cutting speed (rough / finish) | 350 / 420 m/min |
| Minimum wall | 0.5 mm |
| Minimum internal radius | 1 mm |
| Drill depth limit | 8× diameter |
| Best surface (machined / polished) | Ra 0.8 / — |
| Hardenable after machining | No |
Sheet metal
| Formability | Excellent97 / 100 |
|---|---|
| Weldability | Excellent92 / 100 |
| Bendable | Yes |
| Minimum bend radius | 0.5× thickness |
| Spring-back | Low |
| Welding processes | MIG, TIG, SPOT, LASER |
1070 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 |
|---|---|---|
| SiAA limit; EN AW-1070A limits Si 0.20 | ≤ 0.2 | 0.08 |
| Fe | ≤ 0.25 | 0.15 |
| Cu | ≤ 0.04 | 0.01 |
| Mn | ≤ 0.03 | 0.01 |
| Mg | ≤ 0.03 | 0.01 |
| Zn | ≤ 0.04 | 0.01 |
| Ti | ≤ 0.03 | 0.01 |
| V | ≤ 0.05 | 0.01 |
| Others (each)each other element | ≤ 0.03 | |
| Alminimum aluminium content defines the grade | ≥ 99.7 (balance) |
What surface finishes work on 1070?
Anodizes to clear, bright films (standard for reflectors and bright trim); accepts chemical brightening, chromate/chrome-free conversion coating and paint, but the soft surface dents and scratches easily.
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).
Passivation
Conversion Coating
PVD Coating
Equivalent designations
Standards and trade names that resolve to Aluminum 1070 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- A91070
- Aluminum Association
- AA1070
- EN / DIN / Werkstoff-Nr.
- Al99.7AW-1070AW 1070
- JIS
- A1070
How much does 1070 cost?
1070 is a budget-cost aluminum ($), cheaper than about 99% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
1070 — frequently asked
What is 1070 used for?
1070 is typically used for electrical conductors and busbars, chemical processing tanks and liners, deep-drawn and spun vessels, foil and thin strip, reflector sheet and bright trim and heat transfer fin stock. In short: very high purity; high conductivity.
What is the yield strength of 1070?
1070 has a typical yield strength of 25 MPa (3.63 ksi) and a tensile strength of 68 MPa (9.86 ksi) — weaker than 98% of aluminum grades. Strength varies by condition: see the 11 listed tempers.
Is 1070 easy to machine?
Not especially — machinability is rated fair (35/100, worse than 86% of aluminum grades). Very soft and gummy — use polished high-rake tools, sharp inserts, high speed with low feed and generous lubricant; consider H18 temper or 6061 substitution for machined parts.
Can 1070 be welded?
Yes — weldability is rated excellent (92/100). Excellent with TIG/MIG using 1100 or 1188 filler (1070 wire for conductor work); resistance and friction-stir welding also fine, but weld metal reverts to annealed strength.
What surface finishes work on 1070?
Anodizes to clear, bright films (standard for reflectors and bright trim); accepts chemical brightening, chromate/chrome-free conversion coating and paint, but the soft surface dents and scratches easily.
Can 1070 be formed, bent or molded?
Outstanding deep drawing, spinning, roll forming and foil rolling in O/H2x tempers; springback is low but the material galls, so use good lubrication and polished dies.
What is the maximum service temperature of 1070?
1070 is rated for continuous use to about 150°C (302 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does 1070 cost?
1070 is a budget-cost aluminum ($), cheaper than about 99% 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.
Can FabDigit make parts in 1070?
Yes — 1070 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
- International Alloy Designations and Chemical Composition Limits for Wrought Aluminum (Teal Sheets) — The Aluminum Association (2018)
- EN 573-3 / EN 485-2 — Aluminium and aluminium alloys: composition and sheet properties — CEN (2019)
- ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- Commercially pure aluminium 1070/1070A sheet, strip and foil datasheets — various mills (Chalco, Constellium, Alcoa) (2023)
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.