Aluminum A1N30-H18
Temper
H18 = strain hardened, full hard
The standard hard temper for capacitor and thin packaging foil rolled to final gauge without interanneal.
Values for the H18 condition
Other A1N30 tempers and conditions
A1N30 is listed in 10 conditions; see the grade overview at A1N30.
Compare all 10 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
ODefault Annealed | Default soft condition for laminate/pouch foil, deep-drawn packaging and formable foil where maximum elongation is needed. | 30 | 80 | 30 | 23 HB | 61 % IACS |
As fabricated | Mill intermediate stock (hot-rolled coil/re-roll slab) supplied without guaranteed mechanical properties. | 45 | 90 | 25 | 25 HB | 60.5 % IACS |
Strain hardened and partially annealed, quarter hard | Partially annealed soft-hard balance for foil that must still be deep-formed after slitting. | 65 | 95 | 15 | 27 HB | 60.5 % IACS |
Strain hardened, quarter hard | Light cold work when slightly more stiffness than O is needed but forming is still required. | 75 | 95 | 12 | 28 HB | 60 % IACS |
Strain hardened and partially annealed, half hard | Most common semi-hard foil/strip temper: useful strength with retained bendability. | 85 | 110 | 10 | 31 HB | 60 % IACS |
Strain hardened, half hard | Mid cold-worked strip for shallow forming, shielding tape and fin/foil stock needing some handling stiffness. | 95 | 110 | 8 | 32 HB | 60 % IACS |
Strain hardened and partially annealed, three-quarter hard | Near-hard but stabilized ductility; used where H18 cracks during forming. | 105 | 125 | 6 | 36 HB | 59.5 % IACS |
Strain hardened, three-quarter hard | Choose when flatness/stiffness in thin gauge matters more than bendability. | 110 | 125 | 5 | 37 HB | 59.5 % IACS |
H18This page Strain hardened, full hard | The standard hard temper for capacitor and thin packaging foil rolled to final gauge without interanneal. | 135 | 150 | 3 | 44 HB | 59 % IACS |
Strain hardened, extra hard | Maximum cold work, used for very thin high-tension foil runs and etched capacitor foil substrates. | 150 | 165 | 2 | 46 HB | 59 % IACS |
What is A1N30-H18?
A1N30-H18 is A1N30 in the H18 temper — the standard hard temper for capacitor and thin packaging foil rolled to final gauge without interanneal. A1N30-H18 has a yield strength of 135 MPa (19.6 ksi) and a tensile strength of 150 MPa (21.8 ksi) — weaker than 72% of aluminum grades. Elongation at break is 3% and the elastic modulus is 69 GPa (10 Msi). A1N30-H18 has a density of 2.71 g/cm³ (0.0979 lb/in³), heavier than 51% of aluminum grades. It melts at 646°C (1,195 °F). O is the default condition FabDigit quotes; H18 is available on request or by drawing note.
Advantages
- Conducts heat well — 226 W/m·K (130.6 BTU/hr·ft·°F), better than 95% of aluminum grades
- High electrical conductivity — 59 % IACS, better than 95% of aluminum grades
- Good corrosion resistance — 72/100, better than 83% of aluminum grades
- Readily welded — 85/100, better than 79% of aluminum grades
Limitations
- Limited service temperature — 100°C (212 °F), worse than 91% of aluminum grades
- Difficult to machine — 35/100, worse than 86% of aluminum grades
- Limited ductility — 3%, worse than 79% of aluminum grades
A1N30-H18 properties
Typical room-temperature values for A1N30-H18; 14 are specific to this condition. Other listed values are A1N30 reference data and may not represent this condition. Bars are the position among aluminum grades.
Physical3
A1N30-H18 has a density of 2.71 g/cm³ (0.0979 lb/in³), heavier than 51% of aluminum grades. It melts at 646°C (1,195 °F).
Mechanical11
A1N30-H18 has a yield strength of 135 MPa (19.6 ksi) and a tensile strength of 150 MPa (21.8 ksi) — weaker than 72% of aluminum grades. Elongation at break is 3% and the elastic modulus is 69 GPa (10 Msi).
Thermal6
A1N30-H18 is rated for continuous service to 100°C (212 °F). It conducts heat at 226 W/m·K (130.6 BTU/hr·ft·°F), better than 95% of aluminum grades. Thermal expansion is 23.6 µm/m·K (13.1 µin/in·°F).
Electrical3
A1N30-H18 conducts electricity at 59 % 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 A1N30-H18 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
A1N30-H18's machinability is fair (35/100, worse than 86% of aluminum grades); weldability excellent (85/100); formability fair (35/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with A1N30-H18
Is A1N30 easy to machine?
Rarely machined; very soft and gummy — use sharp polished high-rake carbide, high speed, generous lubricant, and expect burrs on any slitting or die-cutting operation.
Can A1N30 be welded?
Excellent GTAW/GMAW/ultrasonic weldability with 1100 or 1188 filler in thicker gauges; in foil gauges joining is normally ultrasonic, resistance or adhesive lamination since fusion welding burns through.
Can A1N30 be formed, bent or molded?
Outstanding cold formability in O/H22 tempers (deep-draw pouch foil); hard H18/H19 foil work-hardens fast and should be interannealed at 300–380 °C if further forming is needed.
What surface finishes work on A1N30?
Takes clear anodizing, chemical conversion (chromate-free passivation) and PET/PP/nylon lamination well; degrease and remove rolling oil before coating, and etch (DC/AC) for capacitor foil surface area.
A1N30 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, as written in the 1N30/1230 registration | ≤ 0.7 | 0.45 |
| Cu | ≤ 0.05 | 0.01 |
| Mn | ≤ 0.05 | 0.01 |
| Mg | ≤ 0.05 | 0.01 |
| Zn | ≤ 0.05 | 0.01 |
| Tigrain refiner residual | ≤ 0.03 | 0.01 |
| Others (each) | ≤ 0.03 | — |
| Alminimum aluminium content defines the grade | ≥ 99.3 (balance) | — |
A1N30-H18 — frequently asked
What is A1N30-H18 used for?
A1N30-H18 is typically used for electrolytic capacitor foil, precision foil stock, laminated pouch and barrier foil, etched anode foil blanks, thin-gauge electrical strip and foil for heat exchanger fin stock. In short: JIS precision foil grade; 1230-class purity band; formability 98, weldability 90.
What is the yield strength of A1N30-H18?
A1N30-H18 has a typical yield strength of 135 MPa (19.6 ksi) and a tensile strength of 150 MPa (21.8 ksi) — weaker than 72% of aluminum grades. Strength varies by condition: see the 10 listed tempers.
Is A1N30-H18 easy to machine?
Not especially — machinability is rated fair (35/100, worse than 86% of aluminum grades). Rarely machined; very soft and gummy — use sharp polished high-rake carbide, high speed, generous lubricant, and expect burrs on any slitting or die-cutting operation.
Can A1N30-H18 be welded?
Yes — weldability is rated excellent (85/100). Excellent GTAW/GMAW/ultrasonic weldability with 1100 or 1188 filler in thicker gauges; in foil gauges joining is normally ultrasonic, resistance or adhesive lamination since fusion welding burns through.
What surface finishes work on A1N30-H18?
Takes clear anodizing, chemical conversion (chromate-free passivation) and PET/PP/nylon lamination well; degrease and remove rolling oil before coating, and etch (DC/AC) for capacitor foil surface area.
Can A1N30-H18 be formed, bent or molded?
Outstanding cold formability in O/H22 tempers (deep-draw pouch foil); hard H18/H19 foil work-hardens fast and should be interannealed at 300–380 °C if further forming is needed.
What is the maximum service temperature of A1N30-H18?
A1N30-H18 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 A1N30-O and A1N30-H19?
O is the default condition — default soft condition for laminate/pouch foil, deep-drawn packaging and formable foil where maximum elongation is needed. H19: maximum cold work, used for very thin high-tension foil runs and etched capacitor foil substrates. Yield strength is 30 MPa in O versus 150 MPa in H19.
Sources
- JIS H4160 — Aluminium and aluminium alloy foils — JSA (2018)
- JIS H4000 — Aluminium and aluminium alloy sheets, strips and plates — JSA (2022)
- International Alloy Designations and Chemical Composition Limits for Wrought Aluminum (Teal Sheets) — The Aluminum Association (2018)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- ASM Handbook Vol. 13B — Corrosion: Materials — ASM International (2005)
- Aluminium foil stock (1N30/1235) technical data — Japanese/Chinese foil rolling mills (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.