Aluminum 1145-H24
Temper
AA 1145 · UNS A91145 · EN AW-1145, AW 1145 · JIS A1145
H24 = strain hardened and partially annealed, half hard
Half-hard but ductile strip for parts that must be formed after rolling (fin, container, lidding stock).
Values for the H24 condition
Other 1145 tempers and conditions
1145 is listed in 8 conditions; see the grade overview at 1145.
Compare all 8 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Pick for maximum ductility, deep drawing, flexible packaging laminates and formed heat-exchanger parts. | 25 | 75 | 35 | 21 HB | 61 % IACS |
Strain hardened and partially annealed, quarter hard | Stabilised soft-intermediate temper giving better bend ductility than H12 at similar strength. | 70 | 95 | 14 | 28 HB | 60 % IACS |
Strain hardened, quarter hard | Light cold work when a little stiffness is needed but forming must stay easy. | 75 | 90 | 12 | 28 HB | 60 % IACS |
H24This page Strain hardened and partially annealed, half hard | Half-hard but ductile strip for parts that must be formed after rolling (fin, container, lidding stock). | 85 | 115 | 10 | 33 HB | 60 % IACS |
Strain hardened, half hard | General-purpose semi-hard strip/sheet for mild bending with moderate strength. | 95 | 110 | 9 | 32 HB | 60 % IACS |
Strain hardened, three-quarter hard | Choose for flat strip and shallow-formed parts needing higher stiffness than H14. | 115 | 130 | 6 | 38 HB | 60 % IACS |
Strain hardened, full hard | Full-hard foil/strip for fin stock, shielding tape and laminate substrates where flatness and strength matter. | 140 | 150 | 5 | 44 HB | 60 % IACS |
Strain hardened, extra hard | The standard mill temper for 1145 foil — insulation/fin/cable and shielding foil where maximum as-rolled strength and flatness are wanted. | 150 | 165 | 4 | 42 HB | 60 % IACS |
What is 1145-H24?
1145-H24 is 1145 in the H24 temper — half-hard but ductile strip for parts that must be formed after rolling (fin, container, lidding stock). 1145-H24 has a yield strength of 85 MPa (12.3 ksi) and a tensile strength of 115 MPa (16.7 ksi) — weaker than 88% of aluminum grades. Elongation at break is 10% and the elastic modulus is 69 GPa (10 Msi). 1145-H24 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).
Advantages
- Conducts heat well — 230 W/m·K (132.9 BTU/hr·ft·°F), better than 96% of aluminum grades
- High electrical conductivity — 60 % IACS, better than 95% of aluminum grades
- Polishes to a fine finish — 80/100, better than 93% of aluminum grades
- Readily welded — 90/100, better than 90% of aluminum grades
- Good corrosion resistance — 72/100, better than 83% of aluminum grades
Limitations
- Difficult to machine — 30/100, worse than 92% of aluminum grades
- Limited service temperature — 110°C (230 °F), worse than 89% of aluminum grades
- Low strength — 85 MPa (12.3 ksi), worse than 88% of aluminum grades
1145-H24 properties
Typical room-temperature values for 1145-H24; 18 are specific to this condition. Other listed values are 1145 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
1145-H24 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).
Mechanical10
1145-H24 has a yield strength of 85 MPa (12.3 ksi) and a tensile strength of 115 MPa (16.7 ksi) — weaker than 88% of aluminum grades. Elongation at break is 10% and the elastic modulus is 69 GPa (10 Msi).
Thermal6
1145-H24 is rated for continuous service to 110°C (230 °F). It conducts heat at 230 W/m·K (132.9 BTU/hr·ft·°F), better than 96% of aluminum grades. Thermal expansion is 23.6 µm/m·K (13.1 µin/in·°F).
Electrical3
1145-H24 conducts electricity at 60 % IACS, better than 95% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is very good (72/100), better than 83% of aluminum grades.
Sustainability4
Producing a kilogram of 1145-H24 takes about 205 MJ of energy and emits 12.5 kg of CO₂ — more than 76% of aluminum grades. Typical recycled content is 15%.
Manufacturability8
1145-H24's machinability is poor (30/100, worse than 92% of aluminum grades); weldability excellent (90/100); formability good (68/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1145-H24
Is 1145 easy to machine?
Very gummy and low-strength — use polished high-rake carbide, high speed, sharp tools and flood lubrication; expect burrs and built-up edge, and prefer H18/H19 over O for any chip cutting.
Can 1145 be welded?
Readily GTAW/GMAW/resistance welded with 1100 or 1188 filler, but foil gauges are normally joined by seaming, adhesive lamination or ultrasonic welding; welding fully anneals the H temper locally.
Can 1145 be formed, bent or molded?
Outstanding cold formability in O temper (deep draw, foil embossing); H18/H19 needs generous bend radii or interstage annealing at 340–400 °C.
What surface finishes work on 1145?
Takes bright and clear anodising very well thanks to high purity; also accepts chromate/no-chrome conversion coats, adhesive lamination and printing — degrease rolling oil before coating.
1145 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+Fecombined silicon plus iron limit per AA registration | ≤ 0.55 | 0.35 |
| Cu | ≤ 0.05 | 0.01 |
| Mn | ≤ 0.05 | 0.01 |
| Mg | ≤ 0.05 | 0.01 |
| Zn | ≤ 0.05 | 0.01 |
| V | ≤ 0.05 | 0.01 |
| Ti | ≤ 0.03 | 0.01 |
| Others (each)others total 0.10 max | ≤ 0.03 | — |
| Alminimum 99.45 % aluminium | ≥ 99.45 (balance) | — |
1145-H24 — frequently asked
What is 1145-H24 used for?
1145-H24 is typically used for insulation foil facing, packaging foil, heat exchanger fin stock, foil-plastic laminates for flexible packaging, cable and duct wrap foil and reflective vapour barriers. In short: foil grade; excellent ductility.
What is the yield strength of 1145-H24?
1145-H24 has a typical yield strength of 85 MPa (12.3 ksi) and a tensile strength of 115 MPa (16.7 ksi) — weaker than 88% of aluminum grades. Strength varies by condition: see the 8 listed tempers.
Is 1145-H24 easy to machine?
Not especially — machinability is rated poor (30/100, worse than 92% of aluminum grades). Very gummy and low-strength — use polished high-rake carbide, high speed, sharp tools and flood lubrication; expect burrs and built-up edge, and prefer H18/H19 over O for any chip cutting.
Can 1145-H24 be welded?
Yes — weldability is rated excellent (90/100). Readily GTAW/GMAW/resistance welded with 1100 or 1188 filler, but foil gauges are normally joined by seaming, adhesive lamination or ultrasonic welding; welding fully anneals the H temper locally.
What surface finishes work on 1145-H24?
Takes bright and clear anodising very well thanks to high purity; also accepts chromate/no-chrome conversion coats, adhesive lamination and printing — degrease rolling oil before coating.
Can 1145-H24 be formed, bent or molded?
Outstanding cold formability in O temper (deep draw, foil embossing); H18/H19 needs generous bend radii or interstage annealing at 340–400 °C.
What is the maximum service temperature of 1145-H24?
1145-H24 is rated for continuous use to about 110°C (230 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Can FabDigit make parts in 1145-H24?
Yes — 1145-H24 is available for 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)
- ASTM B209 / B479 — Aluminum sheet, plate and foil — ASTM International (2021)
- EN 573-3 / EN 546 — Aluminium and aluminium alloys: chemical composition and foil — CEN (2019)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol. 13B — Corrosion: Materials — ASM International (2005)
- Aluminium foil alloy 1145 product data (fin / insulation / shielding foil) — Foil producer datasheets (2023)
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.