Aluminum 1085 · temper
Aluminum 1085-H19
Properties of the H19 condition, compared with the other 1085 tempers.
Heavily rolled foil/wire condition used where maximum as-rolled strength is required.
What is 1085-H19?
1085-H19 is 1085 in the H19 temper — heavily rolled foil/wire condition used where maximum as-rolled strength is required. 1085-H19 has a yield strength of 130 MPa (18.9 ksi) and a tensile strength of 140 MPa (20.3 ksi) — weaker than 74% of aluminum grades. Elongation at break is 3% and the elastic modulus is 69 GPa (10 Msi). 1085-H19 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; H19 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 — 61.3 % IACS, better than 97% of aluminum grades
- Good corrosion resistance — 78/100, better than 94% of aluminum grades
- Readily welded — 90/100, better than 90% of aluminum grades
Limitations
- Difficult to machine — 25/100, worse than 96% of aluminum grades
- Limited service temperature — 100°C (212 °F), worse than 91% of aluminum grades
- Limited ductility — 3%, worse than 79% of aluminum grades
1085-H19 properties
Typical room-temperature values for 1085-H19 — 7 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-H19 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-H19 has a yield strength of 130 MPa (18.9 ksi) and a tensile strength of 140 MPa (20.3 ksi) — weaker than 74% of aluminum grades. Elongation at break is 3% and the elastic modulus is 69 GPa (10 Msi).
Thermal6
1085-H19 is rated for continuous service to 100°C (212 °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-H19 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 1085-H19 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-H19's machinability is poor (25/100, worse than 96% of aluminum grades); weldability excellent (90/100); formability poor (30/100).
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
- H19Heavily rolled foil/wire condition used where maximum as-rolled strength is required.130 MPa yield · 35 HB
Working with 1085-H19
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-H19 — frequently asked
What is 1085-H19 used for?
1085-H19 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-H19?
1085-H19 has a typical yield strength of 130 MPa (18.9 ksi) and a tensile strength of 140 MPa (20.3 ksi) — weaker than 74% of aluminum grades. Strength varies by condition: see the 12 listed tempers.
Is 1085-H19 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-H19 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-H19?
Bright-dip and clear anodize give very high specular reflectance; also takes chemical brightening, mechanical polishing and vacuum-metallized coatings well.
Can 1085-H19 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-H19?
1085-H19 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.
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.