Aluminum 1085 · temper
Aluminum 1085-F
Properties of the F condition, compared with the other 1085 tempers.
Mill product with no controlled mechanical property limits; used for ingot-to-remelt, forging stock and hot-rolled plate to be further worked.
What is 1085-F?
1085-F is 1085 in the F temper — mill product with no controlled mechanical property limits; used for ingot-to-remelt, forging stock and hot-rolled plate to be further worked. 1085-F has a yield strength of 30 MPa (4.35 ksi) and a tensile strength of 70 MPa (10.2 ksi) — weaker than 97% of aluminum grades. Elongation at break is 30% and the elastic modulus is 69 GPa (10 Msi). 1085-F has a density of 2.7 g/cm³ (0.0975 lb/in³), lighter than 60% of aluminum grades. It melts at 646°C (1,195 °F). O is the default condition FabDigit quotes; F is available on request or by drawing note.
Advantages
- Polishes to a fine finish — 95/100, better than 100% of aluminum grades
- Conducts heat well — 234 W/m·K (135.2 BTU/hr·ft·°F), better than 99% of aluminum grades
- High electrical conductivity — 62.5 % IACS, better than 99% of aluminum grades
- Forms and bends easily — 97/100, better than 97% of aluminum grades
- Ductile — tolerates forming and impact — 30%, better than 96% of aluminum grades
Limitations
- Low strength — 30 MPa (4.35 ksi), worse than 97% of aluminum grades
- Difficult to machine — 25/100, worse than 96% of aluminum grades
1085-F properties
Typical room-temperature values for 1085-F — 4 properties are specific to this condition; the rest are grade-level values shared by every 1085 temper. Each bar shows where the value sits among the aluminum grades in FabDigit's library — further right is higher.
Physical3
1085-F has a density of 2.7 g/cm³ (0.0975 lb/in³), lighter than 60% of aluminum grades. It melts at 646°C (1,195 °F).
Mechanical12
1085-F has a yield strength of 30 MPa (4.35 ksi) and a tensile strength of 70 MPa (10.2 ksi) — weaker than 97% of aluminum grades. Elongation at break is 30% and the elastic modulus is 69 GPa (10 Msi).
Thermal6
1085-F is rated for continuous service to 150°C (302 °F). It conducts heat at 234 W/m·K (135.2 BTU/hr·ft·°F), better than 99% of aluminum grades. Thermal expansion is 23.6 µm/m·K (13.1 µin/in·°F).
Electrical3
1085-F conducts electricity at 62.5 % IACS, better than 99% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is very good (78/100), better than 94% of aluminum grades.
Sustainability4
Producing a kilogram of 1085-F takes about 215 MJ of energy and emits 13 kg of CO₂ — more than 92% of aluminum grades. Typical recycled content is 3%.
Manufacturability8
1085-F's machinability is poor (25/100, worse than 96% of aluminum grades); weldability excellent (90/100); formability excellent (97/100).
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Other 1085 tempers and conditions
1085 is also supplied in 11 other conditions. The full side-by-side table is on the 1085 overview.
- ODefaultChoose for maximum formability, deep drawing, foil stock and best electrical/thermal conductivity.22 MPa yield · 19 HB
- H18Fully cold-worked strip/foil: maximum strength and best rolled surface brightness, minimum ductility.115 MPa yield · 33 HB
- H16For flat panels and reflector strip needing more springback resistance; only gentle bends.100 MPa yield · 30 HB
- H26Stabilised three-quarter-hard strip for stamped reflector and trim parts requiring both strength and moderate bending.90 MPa yield · 29 HB
- H14Most common cold-worked sheet temper: good flatness and handling stiffness with usable bendability.85 MPa yield · 27 HB
- H24Half-hard but back-annealed: preferred over H14 when the part must still be bent or deep-drawn.75 MPa yield · 26 HB
- H12Light cold work for slightly stiffer sheet that still bends and draws easily.72 MPa yield · 24 HB
- H22Stabilised quarter-hard sheet with more ductility than H12 at similar strength — good for gentle forming.62 MPa yield · 23 HB
- H112Standard temper for hot-rolled thick plate, extruded bar and busbar profiles in high-purity aluminium.30 MPa yield · 21 HB
- FMill product with no controlled mechanical property limits; used for ingot-to-remelt, forging stock and hot-rolled plate to be further worked.30 MPa yield · 20 HB
Working with 1085-F
Is 1085 easy to machine?
Very gummy — use polished high-rake carbide, high speed, generous coolant/lubricant and chip-breaking geometry to avoid built-up edge and smearing.
Can 1085 be welded?
Excellent with TIG/MIG using 1100 or 1188 filler (or autogenous); no heat-treat recovery, so the HAZ simply returns to O-temper strength.
Can 1085 be formed, bent or molded?
Outstanding cold formability in O/H1x-low tempers — deep draws, spinning and foil rolling; springback is minimal but the metal galls, so use good drawing lubricant.
What surface finishes work on 1085?
Bright-dip and clear anodize give very high specular reflectance; also takes chemical brightening, mechanical polishing and vacuum-metallized coatings well.
1085 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 |
|---|---|---|
| Si | ≤ 0.08 | 0.04 |
| Fe | ≤ 0.12 | 0.07 |
| Cu | ≤ 0.03 | 0.01 |
| Mn | ≤ 0.02 | — |
| Mg | ≤ 0.02 | — |
| Zn | ≤ 0.03 | — |
| Ti | ≤ 0.02 | — |
| V | ≤ 0.05 | — |
| Ga | ≤ 0.03 | — |
| Others (each)each impurity | ≤ 0.01 | — |
| Al99.85% min aluminium | ≥ 99.85 (balance) | — |
1085-F — frequently asked
What is 1085-F used for?
1085-F is typically used for high-brightness reflectors, electronic foil and specialty capacitor stock. In short: highest conductivity 1xxx grade; foil and reflector purity; not a structural grade.
What is the yield strength of 1085-F?
1085-F has a typical yield strength of 30 MPa (4.35 ksi) and a tensile strength of 70 MPa (10.2 ksi) — weaker than 97% of aluminum grades. Strength varies by condition: see the 12 listed tempers.
Is 1085-F easy to machine?
Not especially — machinability is rated poor (25/100, worse than 96% of aluminum grades). Very gummy — use polished high-rake carbide, high speed, generous coolant/lubricant and chip-breaking geometry to avoid built-up edge and smearing.
Can 1085-F be welded?
Yes — weldability is rated excellent (90/100). Excellent with TIG/MIG using 1100 or 1188 filler (or autogenous); no heat-treat recovery, so the HAZ simply returns to O-temper strength.
What surface finishes work on 1085-F?
Bright-dip and clear anodize give very high specular reflectance; also takes chemical brightening, mechanical polishing and vacuum-metallized coatings well.
Can 1085-F be formed, bent or molded?
Outstanding cold formability in O/H1x-low tempers — deep draws, spinning and foil rolling; springback is minimal but the metal galls, so use good drawing lubricant.
What is the maximum service temperature of 1085-F?
1085-F 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 1085-O and 1085-H19?
O is the default condition — choose for maximum formability, deep drawing, foil stock and best electrical/thermal conductivity. H19: heavily rolled foil/wire condition used where maximum as-rolled strength is required. Yield strength is 22 MPa in O versus 130 MPa in H19.
Sources
- International Alloy Designations and Chemical Composition Limits for Wrought Aluminum (Teal Sheets) — The Aluminum Association (2018)
- EN 573-3 Aluminium and aluminium alloys — Chemical composition of wrought products — CEN (2019)
- EN 485-2 Aluminium and aluminium alloys — Sheet, strip and plate: mechanical properties — CEN (2016)
- ASM Handbook Vol. 2: Properties and Selection — Nonferrous Alloys — ASM International (1990)
- Aluminum: Properties and Physical Metallurgy — 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.